#ruby on 2013-10-08 — irc logs at freenode.irclog.whitequark.org

2013-08-12 20:51 apeiros changed the topic of #ruby to: Ruby 2.0.0-p247: http://ruby-lang.org (Ruby 1.9.3-p448) || Paste >3 lines of text on http://gist.github.com || this channel is logged at http://irclog.whitequark.org, other public logging is prohibited

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00:01 <heftig> by the way, in bash: read lavg1 lavg5 lavg15 tasks lastpid </proc/loadavg

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00:02 <heftig> in ruby: lavg1, lavg5, lavg15, tasks, lastpid = File.read("/proc/loadavg").split

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00:05 <[gnubie]> heftig: thank you! ;)

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00:16 <platzhirsch> Does anyone use syntastic for Ruby in Vim?

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00:18 <[gnubie]> heftig: how do you convert this command in ruby? $ free -m | grep -i "buffers/cache" | awk '{ print $3 }'

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00:19 <[gnubie]> heftig: i mean, if there is a direct way to get the same output without calling different shell commands

00:19 <platzhirsch> nvm

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00:24 <heftig> [gnubie]: this, I guess:

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00:24 <heftig> meminfo = Hash[ File.read("/proc/meminfo").scan(/^(\w+):\s*(\d+)/).map { |(name,amount)| [name,amount.to_i] } ]

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00:24 <heftig> (meminfo["MemTotal"] - meminfo["MemFree"] - meminfo["Cached"]) / 1024

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00:26 <heftig> ah, this is better:

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00:26 <heftig> meminfo = Hash[ File.read("/proc/meminfo").scan(/^([^:]+):\s*(\d+)/).map { |(name,amount)| [name,amount.to_i] } ]

00:26 <heftig> (meminfo["MemTotal"] - meminfo["MemFree"] - meminfo["Cached"]) / 1024

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00:27 <[gnubie]> heftig: let me try it. thanks.

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00:34 <Mattx> Is there any way to do more than one substitution at the same time?

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00:35 <Mattx> I want for example to replace 1 -> "a" and 2 -> "b"

00:35 <Mattx> in "foo 1 bar 2"

00:35 <Mattx> in one line

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00:35 <heftig> >> "foo 1 bar 2".tr("12","ab")

00:35 <eval-in> heftig => "foo a bar b" (https://eval.in/53161)

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00:35 <Mattx> ohh, cool

00:35 <Mattx> thanks heftig

00:35 <heftig> only works with single characters, though

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00:36 <Mattx> that's exactly what I'm looking for

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00:37 <popl> tr is transliteration, not substitution

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00:45 <Ahti333> hi! i'm currently trying to compile ruby 2, but i get a bunch of undefined symbol errors while linking. all begin with 'RUBY_DTRACE', and i could indeed not find any place these functions would be defined

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00:47 <Ahti333> does anyone know how i might fix this?

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00:56 <havenwood> Ahti333: Can you paste a Gist of the failure?

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00:59 <Ahti333> havenwood: https://gist.github.com/Ahti/605614769beb555688ec

00:59 <Ahti333> i am also trying to build for ios, armv7, i guess that would be a part of the problem?

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01:37 <tjbiddle> Hey guys - is there a way I can force a CLI to give me a stack trace? I'm running puppet and it eats it

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01:38 <danshultz> tjbiddle: what command are you using to run puppet?

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01:38 <tjbiddle> puppet autoami run --debug --verbose

01:38 <tjbiddle> I think there's --trace actually, trying now.

01:38 <tjbiddle> danshultz: (Forgot to tag)

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01:39 <danshultz> yeah, usually they is a --trace on most commands to force a trace

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01:39 <danshultz> that's just general convention many apps follow

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01:40 <tjbiddle> danshultz: Success. Yeah - Figured. Just `puppet help` doesn't print out options (I had to guess that --verbose and --debug existed, granted I probably should have just checked the man page :-))

01:40 <tjbiddle> Thanks!

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01:41 <danshultz> yep :) - also, would be better to pose that question in the #puppet room

01:43 <tjbiddle> danshultz: Already had :-) I was asking #ruby just if there was a way to force any arbitrary CLI app to do something, puppet was just an unnecessary detail

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01:45 <danshultz> tjbiddle: yeah, there isn't way to force a stack, etc

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01:45 <danshultz> it's up to the CLI app to suppress or provide that

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01:45 <danshultz> typically though, out of the gate, you'll get a full stack

01:46 <tjbiddle> danshultz: Yeah, didn't think there would be a way since it's normally a rescue statement - but was crossing my fingers, heh

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02:59 <nhmood> Is there any way to treat STDOUT (or $stdout) as a File type where I can use the .write method with it? (http://pastebin.kde.org/ptwrqbh3h)

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03:00 <bnagy> >> STDOUT.write "hi\n"

03:00 <eval-in> bnagy => hi ... (https://eval.in/53162)

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03:03 <nhmood> Whoops, my error wasn't related to using #write on STDOUT :-[, that seems to work fine, thanks!

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03:08 <lgierth> i'm having a fun time raising frozen errors: https://gist.github.com/lgierth/0ce6f5d119d1bfae12af

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03:09 <lgierth> i'd expect __id__ to be the same after rescueing, and using jruby and rubinius, it is

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03:10 <lgierth> but 1.8.7, 1.9.3, and 2.0.0 all create a new object that's not frozen, similar to what #dup does

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03:11 <lgierth> anybody got an idea what that's about? i didn't find it in rubyspec either

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03:38 <bnagy> lgierth: consider asking in #ruby-lang as well, just let em know you're crossposting

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04:05 <chrisbolton> K, I'm taking a second stab at this … https://gist.github.com/Iknewthisguy/6875557, I need to clean this up, not let the wallets or cost go below zero and retain the wallet totals. Oh yeah and a lot of help.

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04:17 <asdasdasdasdasd_> bnagy: got it by reading code. an exception needs a backtrace, and if it doesn't, mri just builds a whole new object instead of just assigning the backtrace

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04:31 <bnagy> chrisbolton: what are you actually trying to do?

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04:32 <bnagy> this is a programming exercise, right? Do you have the actual exercise?

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04:33 <chrisbolton> bnagy: something like this https://gist.github.com/Iknewthisguy/6875557

04:33 <chrisbolton> Not a programming exercise. An actual problem I'm trying to solve.

04:34 <bnagy> I looked at the code. Set it on fire, then tell me what you're actually trying to do

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04:35 <sevenseacat> lol

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04:37 <chrisbolton> Nice.

04:38 <chrisbolton> I have three buckets of money. I need to empty them in order until I've paid for whatever item.

04:38 <bnagy> just saying, no code that looks like that is ever correct ruby. If you explain your algorithm we can fit it into actual idiom

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04:38 <chrisbolton> I also need to keep track of the the amounts left in whatever buckets I've got.

04:39 <bnagy> ok so no load sharing, no 'most efficient' or anything

04:39 <chrisbolton> I know there's a beautiful ruby way to do it I just don't know how.

04:40 <chrisbolton> Yeah no load sharing. Need to iterate over the buckets/wallets/whatever you want to call them.

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04:40 <bnagy> there are a lot. I'll give you what I personally think is the clearest, but I won't write working code :)

04:40 <chrisbolton> Cool with me.

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04:40 <bnagy> make a paid variable first, paid = 0. Now we're going to iterate the wallets, that looks like wallets.each {|wallet|

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04:41 <heftig> lgierth: actually, i think rbx and jruby are wrong here

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04:41 <heftig> lgierth: raising an exception modifies the object, so it can't be frozen

04:41 <bnagy> now, if total - paid > 0, take money from this wallet

04:41 <bnagy> if paid is now enough, break

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04:42 <heftig> mri works around it by dupping, rbx violates the freeze

04:42 <lgierth> heftig: if i set the backtrace before raising, it isn't modified

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04:42 <bnagy> you could make it much shorter and golfier, but this code should be very obvious

04:42 <poisonarms> Is there a way to tell rubygems to not download from an HTTPS source?

04:43 <chrisbolton> golfier?

04:43 <lgierth> so it just seems to be a lack of `ex.set_backtrace(caller) if ex.kind_of?(Exception)`

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04:43 <bnagy> chrisbolton: yeah, like 'cooler' / shorter

04:43 <chrisbolton> Gotcha.

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04:43 <heftig> lgierth: and in that case, it's not dupped, either

04:44 <bnagy> so just start out with wallets as a simple array of numbers

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04:44 <lgierth> yeah, it essentially does exception_class.new(ex.to_s), as far as i understand

04:44 <bnagy> chrisbolton: uh you know what each blocks look like in ruby?

04:44 <chrisbolton> bnagy: yeah

04:44 <poisonarms> Figured it out.

04:44 <bnagy> cool

04:45 <poisonarms> gem source --add <source>

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04:46 <bnagy> chrisbolton: so the core logic in the block is if total - paid > w; #put it all in, set this wallet to 0; else #put in just enough; break

04:47 <chrisbolton> bnagy: Exactly. I'm taking a swag at it right now.

04:47 <bnagy> if you get to the end and paid < total then all the wallets will be 0

04:47 <bnagy> and I guess you handle that

04:47 <bnagy> although it's a lot easier if you just don't start the block until you know they can afford it

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04:48 <bnagy> chrisbolton: AUGH sorry my brain is fried

04:49 <chrisbolton> bnagy, exactly I would check to make sure the total wallets is greater than the cost before starting the loop.

04:49 <bnagy> you're going to have to work with each_index or map not each, I think

04:49 <bnagy> map is pretty idiomatic

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04:52 <bnagy> but break in a map won't work right

04:52 <chrisbolton> I'll figure out the loop and break

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04:52 <bnagy> if you want to break then iterate with each_index

04:53 <bnagy> and operate on wallets[i]

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04:57 <poisonarms> Is there a way to tell RubyGems where Ruby is when installing a gem? For example, I have 1.8.7 and 2.0.0, but by default, gems tries to build with 1.8.7. I want to build with 2.0.0, but I'm not sure how to accomplish this.

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04:58 <bnagy> poisonarms: use one of the version managers, or install systemwide from source, depending on your os

04:59 <poisonarms> Version managers?

05:00 <bnagy> rbenv chruby rvm, in (my) order of preference

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05:01 <sevenseacat> \o/ chruby

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05:06 <xybre> Man that yak is gonna be SO naked when I'm done..

05:07 <bnagy> what you shaving?

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05:08 <xybre> bnagy: All kinds of silly things. Picking tools for the job, fixing my prompt setup, getting zsh back up and running again, pull down old code spikes for reference, setting up CI services.. Maybe I should just spike some more code so I feel useful.

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05:55 <funburn> I need to send unix epoch time to a legacy app but I need to send it adjusted for local time so Time.to_i doesn't work, suggestions?

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05:58 <apeiros> funburn: Time#to_i + basic arithmetics.

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05:59 <funburn> that gets a little complicated with DST but I guess

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05:59 <funburn> I was hoping there was some pre-existing method chain that could do it cleanly

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06:00 <apeiros> Time#dst?

06:00 * apeiros got to commute

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06:00 <funburn> thanks for the pointer

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06:00 <xybre> funburn: ActiveSupport has a TimeWithZones class that might be useful.

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06:01 <funburn> xybre, trying not to use rails classes, but thanks for the suggestion!

06:01 <xybre> What about tzinfo?

06:02 <funburn> as in the unix command

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06:02 <xybre> http://rubydoc.info/gems/tzinfo/file/README.md

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06:03 <funburn> ah!

06:03 * xybre gets the trimmers, more yaks need shaving!

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06:03 <funburn> thanks!

06:03 <sevenseacat> shave all of the yakkkkks

06:04 <zachrab> anybody have any experience using cocoapods gem?

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06:04 <funburn> oh actually #gmt_offset does all the heavy lifting here

06:04 <sevenseacat> thats rubymotion specific isnt it?

06:04 <zachrab> sevenseacat: yes

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06:06 <sevenseacat> might be worth asking in a rubymotion place then

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06:08 <zachrab> did so but no active participants

06:10 <realcasually> quick question--i have a float.round(1), but i want it to also round to the nearest integer if its close

06:10 <realcasually> e.g. 5.01 -> 5

06:10 <popl> quick questions rarely are :)

06:10 <realcasually> but 5.23 -> 5.2

06:10 <realcasually> right now i get 5.0

06:10 <realcasually> which id like to avoid

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06:10 <realcasually> true, but i always like to think they will be ;)

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06:12 <popl> 5.2 is not an integer

06:13 <popl> what do you want 5.23 to round to?

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06:18 <coderhs> hey i installed a ruby gem, but doing so didn't install its dependencies

06:18 <coderhs> https://github.com/qburstruby/grape_goliath/blob/master/grape_goliath.gemspec

06:18 <coderhs> any idea why>

06:18 <coderhs> ?

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06:19 <sevenseacat> what did it install?

06:19 <coderhs> just the actual gem

06:20 <sevenseacat> then you probably already have all the other dependencies

06:20 <sevenseacat> there arent many

06:20 <coderhs> nope

06:20 <coderhs> rubygen is not in my system, due to that the gem isn't working

06:20 <coderhs> or <newgem> to be precise

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06:23 <popl> coderhs: how are you trying to install it?

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06:23 <coderhs> gem install grape_goliath

06:23 <realcasually> popl: i want 5.23 to round to 5.2

06:23 <realcasually> but 5.0 to round to 5

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06:24 <popl> so the next significant figure?

06:25 <popl> I don't know that there's a float method to do that. you will probably have to write the logic

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06:26 <sevenseacat> two significant figures unless the last one is a 0

06:26 <sevenseacat> then only one :P

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06:26 <popl> 0 is not a significant figure

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06:27 <sevenseacat> it is if its on the right of another

06:27 <sevenseacat> only leading 0s are insignificant

06:27 <popl> I think you've got that backwards

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06:28 <sevenseacat> no, 0.5 and 000000.5 are both only one significant figure

06:28 <sevenseacat> 00000.50 is two

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06:29 <popl> 00000.50 has one significant figure

06:29 <popl> .5

06:29 <sevenseacat> sigh

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06:30 <popl> don't sigh, point me to documentation which corrects me if I am misled.

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06:30 <sevenseacat> http://en.wikipedia.org/wiki/Significant_figures

06:30 <popl> I am reading a definition of it now and I think you are incorrect.

06:30 <sevenseacat> "Trailing zeros in a number containing a decimal point are significant. For example, 12.2300 has six significant figures: 1, 2, 2, 3, 0 and 0. The number 0.000122300 still has only six significant figures (the zeros before the 1 are not significant). "

06:30 <popl> trailing zeros

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06:31 <popl> the introduction of that article contradicts what you just quoted

06:31 <popl> ask wolfram mathworld instead

06:31 <sevenseacat> its exactly what i just said

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06:32 <popl> "The significant figures of a number are those digits that carry meaning contributing to its precision. This includes all digits except: * All leading zeros; * Trailing zeros [...]"

06:32 <popl> you are wrong. just admit it. :P

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06:32 <sevenseacat> now copy the rest of the line

06:32 <sevenseacat> instead of only the bits that back up what you say

06:32 <popl> which parts?

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06:33 <sevenseacat> "Trailing zeros when they are merely placeholders to indicate the scale of the number (exact rules are explained at Identifying significant figures); " (which links to the part i pasted above)

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06:33 <sevenseacat> this is like high school maths

06:33 <popl> yeah I know

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06:34 <popl> I like this, it is less amibiguous: http://mathworld.wolfram.com/SignificantDigits.html

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06:35 <sevenseacat> ... which also says what i was saying

06:35 <sevenseacat> this is fun.

06:35 <popl> you're saying 0.50 has two sig figs?

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06:36 <popl> or three?

06:36 <sevenseacat> two.

06:36 <popl> 0.5

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06:36 <sevenseacat> one.

06:37 <popl> no, is 0.5 the two significant figures of 0.50?

06:37 <sevenseacat> no

06:37 <sevenseacat> .50

06:37 <popl> because the trailing zero means jack

06:37 <sevenseacat> sigh

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06:39 <popl> how am I misinterpreting the wolfram alpha def'n?

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06:41 <popl> fyi that wolframalpha article does _not_ say what you were saying.

06:41 <sevenseacat> if you say so buddy.

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06:42 <popl> whatever man. if I'm wrong then I'll admit it, but you

06:42 <sevenseacat> clearnt not :P

06:42 <popl> 're just telling me I'm wrong and not showing me

06:42 <sevenseacat> clearly

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06:44 <popl> :(

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06:49 <Ins3kt> hi

06:49 <sevenseacat> howdy

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07:27 <realcasually> sorry--got disconnected

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07:28 <realcasually> so, i am not sure what to use

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07:28 <realcasually> i need 5.0 going to 5, but i need 5.12 going to 5.1

07:28 <realcasually> is there a way to do that with ruby Floats?

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07:29 <apeiros> realcasually: (num*10).round.fdiv(10)

07:30 <apeiros> err, just round(1) ?

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07:33 <realcasually> apeiros: thanks--reading about fdiv

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07:33 <apeiros> forget that

07:33 <apeiros> that's just emulating round(1)

07:34 <realcasually> apeiros: i want a max of 2 decimals

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07:34 <realcasually> but always try to reduce decimal count

07:34 <realcasually> so 5.00 should be 5

07:34 <apeiros> realcasually: um, you're not being consistent

07:34 <apeiros> 5.12 *is* 2 decimals

07:34 <apeiros> yet you say you want 5.1

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07:35 <apeiros> can you please make up your mind and then ask again?

07:35 <realcasually> d'oh sorry, 5.12 stays 5.12

07:35 <realcasually> 5.123 becomes 5.12

07:35 <apeiros> also, 5.00 *is* 5

07:35 <realcasually> 5.10 becomes 5.1

07:35 <apeiros> oh I suspect you're not talking about numbers but about presentation.

07:35 <realcasually> correct

07:36 <realcasually> i eventually display it in a string

07:36 <apeiros> since 5.00 is 5 and 5.10 is 5.1

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07:36 <apeiros> well, you should say that. it matters. just a tiny bit. you know?

07:36 <apeiros> I don't think there's a formatting option in sprintf to do that directly.

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07:36 <sevenseacat> where's popi to yell at apeiros for 'getting it wrong'

07:37 <sevenseacat> popl rather

07:37 <apeiros> you could sub away trailing zeroes: .sub(/(\.[^0]+)0*$/, '\1')

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07:37 <apeiros> popl? huh? haven't seen him do that.

07:37 <realcasually> apeiros: thanks--that would likely work

07:37 <realcasually> just not sure if someone has solved this already

07:38 <realcasually> but i didnt see anything in the float API that made sense

07:38 <sevenseacat> apeiros: sorry, just a reference to a significant-figures debate we had before

07:38 <apeiros> hm, that one is incomplete, though. it'll not turn 5.0 into 5

07:38 <realcasually> i tried to write something with a bunch of % functions, but the float precision bit me

07:38 <apeiros> sevenseacat: ah. missed that.

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07:44 <realcasually> seems odd there isnt a way to do that built it

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07:45 <realcasually> *built in

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07:46 <apeiros> um, not really

07:46 <apeiros> usually you want a specific precision

07:46 <apeiros> not a "oh once I'd like this, the other time I'd like that"

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07:47 <Hanmac> hihihi apeiros i found a new "toy" … i played with NaN a bit … did you know that "-@" can do to an NaN ? ;P

07:47 <apeiros> what you do is basically robbing the viewer of the information, how precise your numbers actually are.

07:47 <apeiros> hanmac: I'd expect it to return NaN?

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07:47 <apeiros> since all mathematical operations with NaN should result in NaN

07:48 <Hanmac> yes and no

07:48 <Hanmac> >> [[Float::NAN].pack("g"), [0.0/0.0].pack("g"), [-(0.0/0.0)].pack("g")]

07:48 <eval-in_> Hanmac => ["\x7F\xC0\0\0", "\xFF\xC0\0\0", "\x7F\xC0\0\0"] (https://eval.in/53166)

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07:48 <apeiros> o0

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07:49 <apeiros> ok, interesting. but not interesting enough for me to go read IEEE 754

07:49 <Hanmac> other operations like NaN +/- other return the same as self, but -@ is a little bit different

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07:49 <Hanmac> apeiros: it seems that -@ is used in ruby to turn an loud nan into an quiet one … (hm it may be not 100% correct for that IEEE one .. )

07:50 <realcasually> apeiros: on a mobile device, and when 2 digits tends to be rare, it is a better use of the space

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07:50 <realcasually> the point isnt to justify if you would do it the same as me, its to figure out if ruby offers an option

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07:50 <Hanmac> apeiros: i make a ticket for that to make it more clear: https://bugs.ruby-lang.org/issues/8994

07:50 <apeiros> realcasually: I have a better term for that: it's an inconsistent use of the space

07:50 <realcasually> yep, optimized for the mainline case

07:50 <realcasually> yet still supporting some edge cases

07:51 <apeiros> realcasually: look, it's your thing. I told you why there's no pre-made tool to do what you want (because it's usually not a good idea). you can accept it or go all around how what you do is a good idea anyway.

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07:53 <Hanmac> shevy: you are so quiet, are you an NaN too? ;D

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07:54 <iIlL10Oo> how to convert a integer to ipaddr ?

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07:56 <heftig> iIlL10Oo: IPAddr.new(i, Socket::AF_INET)

07:56 <Hanmac> iIlL10Oo: what kind of integer and what kind of ipaddr?

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08:05 <Ahti333> is there someone in here who is familiar with the details of building ruby? I am getting a bunch of undefined symbol errors during linking. all of them start with _RUBY_TRACE

08:05 <Ahti333> i can not find where these functions should be defined, so i am a bit confused about why they are used in a bunch of places in ruby code

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08:06 <Ahti333> *_RUBY_DTRACE

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08:07 <realcasually> apeiros: a=num.round(2).to_s; a.chop! while a.length > 1 and (a.end_with? '.' or a.end_with? '0');

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08:11 <iIlL10Oo> heftig: thank you , it works

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08:19 <shevy> hanmac just got home from a biochemistry lecture

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08:20 <Hanmac> shevy: i am sorry but i need to tell you that there is also one of my requests in ruby core … https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/43107

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08:21 <shevy> hanmac do you micro-optimize now? :P

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08:21 <shevy> I want mruby finished!

08:22 <Hanmac> shevy: no i looked at the Changelog and see some stuff commited that i requested 7 month ago

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08:22 <shevy> hehe

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08:24 <Hanmac> i mean i didnt had it on the radar anymore ;D

08:24 <Hanmac> shevy: did you see my pun .. ah i mean fun with NaN objects and the -@ method? ;D

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08:25 <shevy> half the time I have no idea what you are talking about :P

08:25 <Hanmac> xD

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09:35 <xybre> Can I IO#read_nonblock everything available? Or do I need to just set the length to some absurdly high value.

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09:37 <bnagy> xybre: .. think about what you just said

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09:37 <xybre> IO#read_nonblock requires a maxlen argument.

09:37 <bnagy> "hi is everything available yet" "no." "how about now?"

09:38 <Hanmac> xD

09:38 <xybre> I want everything thats currently buffered without blocking.

09:38 <olivier_bK> i try to make a ssh connection in ruby but all the time i get this (Net::SSH::AuthenticationFailed)

09:38 <olivier_bK> i try to pass my ssh_key

09:38 <xybre> I don't mean EOF.

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09:39 <apeiros> xybre: absurdly high value

09:39 <Hanmac> like Infinity + 1? :D

09:39 <apeiros> alternatively: buffer until it raises the "try again later" exception

09:40 <apeiros> then you actually know that there's nothing left

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09:41 <Hanmac> you mean like in the banks of the usa? ;P

09:41 <xybre> I was thinking I could do `while has_data? do; string << io.read_nonblock(1024); end` (where has_data? is a wrapper around IO.select) but I thought there might be a better way.

09:41 <workmad3> hanmac: Infinity + 1 == Infinity :P

09:41 <apeiros> usa? that 3rd world country?

09:41 <funburn> apeiros: I just wanted to follow up on my query earlier. I found that I could get what I trying for with this time.to_i + time.gmt_offset

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09:42 <Hanmac> workmad3: look at this:

09:42 <Hanmac> >> [[Float::NAN].pack("g"), [0.0/0.0].pack("g"), [-(0.0/0.0)].pack("g")]

09:42 <eval-in_> Hanmac => ["\x7F\xC0\0\0", "\xFF\xC0\0\0", "\x7F\xC0\0\0"] (https://eval.in/53169)

09:42 <apeiros> funburn: gah! I thought of Time#offset, but that didn't exist. didn't think of gmt_offset

09:42 <bnagy> xybre: I've always just used threads or wrapped reactors

09:42 <apeiros> funburn: good you found it!

09:42 <funburn> thank dog for documentation :)

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09:42 * apeiros bows to almighty dog

09:43 <funburn> :)

09:43 <workmad3> hanmac: what about it?

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09:43 <xybre> bnagy: Yeah, for some reason Rubinius doesn't implement one of the Socket methods I'm using so threading becomes problematic.

09:43 <xybre> (rather, so I'm using MRI)

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09:43 <bnagy> eh?

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09:43 <Hanmac> that the -@ function alters the NaN … imo should not do that

09:44 <workmad3> hanmac: no, the odd thing is that the middle value is different ;)

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09:46 <Hanmac> hm no its the -@ function on the NaN object that alters the third from the second

09:46 <workmad3> hanmac: for some reason '0.0/0.0' gives you a different NaN to 'Float::NAN'

09:46 <workmad3> hanmac: first and third values are the same

09:46 <workmad3> hanmac: second one is different

09:46 <apeiros> http://de.wikipedia.org/wiki/NaN says it's actually legit

09:46 <Hanmac> thats because Float::NAN is a quiet one, and 0.0 / 0.0 is not …

09:46 <workmad3> hanmac: first is a straight Float::NAN... so why is that different to 0.0/0.0

09:46 <apeiros> you can have a number of different values which all mean NaN

09:46 * apeiros off for lunch

09:47 <Hanmac> workmad3: i make a ticket about it https://bugs.ruby-lang.org/issues/8994

09:47 <xybre> bnagy: Rubinius doesn't implement TCPSocket#connect_address

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09:47 <workmad3> hanmac: ok, so -(0.0/0.0) is a quiet NaN

09:47 <workmad3> hanmac: and 0.0/0.0 isn't

09:48 <workmad3> hanmac: which seems correct

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09:48 <bnagy> xybre: that's on basicsocket, no?

09:48 <workmad3> hanmac: a signalling NaN should, if appropriate, be converted into a quiet NaN by an operation

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09:49 <xybre> bnagy: Yes, but that's the error Rubinius displays.

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09:49 <bnagy> does it have local_address?

09:50 <bnagy> like.. all that does is give you an addrinfo, no?

09:50 <bnagy> there's a million ways to get those

09:50 <Hanmac> workmad3: hm yeah but i dont think -@ is the right operation for that … (beause thats two different flags in the value)

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09:50 <bnagy> pack it by hand if you have to..

09:50 <xybre> bnagy: I assume the difference is that TCPServer.open(port).accept returns a TCPSocket in Rubinius, but a BasicSocket in MRI.

09:51 <xybre> bnagy: Yes, I just am not working on that codebase right now and so haven't changed lanes to tackle finding a different method.

09:51 <bnagy> *shrug* I never used TCPSocket tbh

09:52 <workmad3> hanmac: 'Floating point operations on a signaling NaN (sNaN) signal an invalid operation exception, the default exception action is then the same as for qNaN operands and they produce a qNaN if producing a floating point result.'

09:52 <bnagy> always seemed like gumf

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09:52 <bnagy> Socket is a wafer thin socket wrapper, adding a micron via TCPSocket is kinda lame

09:52 <xybre> Well.. if I want to use TCP sockets, thats the only way I'm aware of to do them in Ruby.

09:52 <workmad3> hanmac: seems correct to me

09:52 <bnagy> xybre: just use Socket

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09:53 <xybre> bnagy: Whats the difference?

09:53 <bnagy> TCPSocket is some pure ruby hand wavy shit

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09:53 <bnagy> Socket is a straightline socket.h port more or less

09:53 <bnagy> well wrap not port

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09:54 <Hanmac> workmad3: wikipedia says: "For example, a bit-wise IEEE floating-point standard single precision (32-bit) NaN would be: s111 1111 1axx xxxx xxxx xxxx xxxx xxxx where s is the sign (most often ignored in applications), a determines the type of NaN, and x is an extra payload (most often ignored in applications). If a = 1, it is a quiet NaN; if a is zero and the payload is nonzero, then it is a signaling NaN." … so i think -@ should alter "s" an

09:54 <xybre> s.connect Socket.pack_sockaddr_in(80, 'example.com') # I think I'll pass

09:55 <bnagy> xybre: well sockaddr is sockaddr, it's not like _super_ tricky

09:55 <bnagy> but yes, Socket is ugly

09:55 <xybre> http://ruby-doc.org/stdlib-1.9.3/libdoc/socket/rdoc/Socket.html#label-Quick+start

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09:56 <xybre> Well, in all fairness I'm going to build a wrapper around TCPSocket anyway.

09:56 <bnagy> hence all the rainbow shiny ruby gems to do every kind of socket IO with DSLs and all

09:57 <xybre> I haven't seen a good gem for that, I've seens lots of gems, but they're mostly chained to one platform and don't really cover a lot of ground.

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09:58 <bnagy> anyways, bedtime out here :)

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10:59 <_br_> What is the go-to solution if I want to integrate Twitter/Facebook login into a Sinatra based site that already uses Warden?

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11:21 <bonhoeffer> \exit

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11:23 <jmaister> /part and /quit sat in a boat. /part fell out, who was left?

11:24 <aagdbl> lol

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11:24 <aagdbl> {left: /quit/}

11:25 <_br_> cute

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11:36 <shevy> jmaister I once fell for /join #0

11:36 <jmaister> hirr

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11:37 <jmaister> That's almost as good as `sudo rm -fr /`

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11:42 <xybre> /quit was left

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12:06 <hugohagogo> aloha

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12:06 <olivier_bK> hi

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12:18 <TMM> xybre, did you have a chance to look at my suggested implementation? I'd really appreciate some of your feedback if you have the time

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12:27 <akesterson> I have a library that appears to be calling exit() when it hits an error (mcollective gem, rpc client, failing to read the config file and it's dying), but rescue SystemExit isn't catching it ... It's definitely exiting, however, a 'puts' immediately after the failing line does not print ... what can I do to catch this exit and stop it from killing my program, and fail gracefully?

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12:31 <apeiros> akesterson: you can smack the developer and tell him to do better. and to solve your problem without violence, you can monkey-patch Kernel#exit

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12:31 <apeiros> though, a `rescue SystemExit` worked nicely here

12:31 <_br_> Maybe of type fatal?

12:32 <akesterson> 'rescue SystemExit' didn't catch it

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12:32 <akesterson> I opened the source after asking the question, and they're doing 'exit!' which apparently 'rescue SystemExit' and 'rescue Exception' doesn't catch

12:32 <apeiros> or exit!, not exit

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12:32 <akesterson> but thankfully there is an undocumented flag on the initializer to prevent that behavior, so that solved the problem

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12:32 <akesterson> I may go and smack the developer anyway tho :)

12:33 <apeiros> akesterson: correct. exit! is non-rescuable.

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12:33 <apeiros> don't use the term `catch`, it means something different in ruby.

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12:33 <_br_> Yeah, still waiting for 'punch-over-tcpip' for this kind of nonsense.

12:34 <apeiros> also electrocute-over-tcpip-via-keyboard

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12:34 <_br_> oh yeah, big like

12:34 * apeiros thinks of 7of9 and an uncooperative alien

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12:35 <_br_> stvoy?

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12:35 <_br_> She actually fainted during the first few episodes due to the suit making it difficult to breathe.

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12:37 <apeiros> _br_: yes. when she electroshocked that guy remotely because he was uncooperative.

12:37 <apeiros> and yes, stvoy

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12:37 <apeiros> heh, didn't know about her fainting. poor her.

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12:38 <_br_> ah

12:38 <workmad3> she had to be sewn into it for filming, didn't she?

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12:38 <_br_> Bodycast :D

12:39 <apeiros> workmad3: well, there have been worse costumes…

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12:39 <_br_> really?

12:39 <apeiros> didn't worf spend like hours in the mask?

12:39 <_br_> ah true

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12:45 <_br_> Speaking of worf... http://www.youtube.com/watch?v=4NOM-kLfDR8

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13:07 <TMM> https://gist.github.com/hpvb/6870084 <--- if anyone wants to critique that would be great

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13:09 <Hanmac> TMM: def define_attr(*attr); singleton_class.send(:attr_accessor,*attr); end

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13:13 <Hanmac> TMM and you need to understand that the @@classes variable is shared between your LFactory and your CSFactory … (so they are the same for both)

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13:29 <tobiasvl> ugh don't use @@vars :(

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13:30 <Hanmac> someday ruby would have @@@vars … ;P

13:30 <kaldrenon> @@@vars are accessible even when your program isn't running.

13:30 <Hanmac> XXD

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13:31 <sevenseacat> lol

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13:32 <Hanmac> so they are available before the program is running? ;D

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13:33 <tobiasvl> yes, they exist in Platon's ideal world

13:33 <tobiasvl> they're always the same in any ruby program ever

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13:35 <kaldrenon> They're UberGlobals. They can be modified via REST API, SQL queries, reflection, and interpretive dance.

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13:36 <Hanmac> hm if they are UberGlobals i think they should be like $$vars

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13:39 <apeiros> hanmac: \@$!vars

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13:40 <Hanmac> XD

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13:41 <ccooke> That's just silly. I think it would be far better just to bring in global namespaces

13:42 <ccooke> For instance, $variable is visible in most of the code, while £variable only in parts. €variable might be visible in most of it, too, but not quite overlapping with $variable

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13:42 <ccooke> and a *true* global variable would be ¤variable

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13:43 <apeiros> please, it should be

13:43 <apeiros> and

13:43 <TMM> hanmac, I rely on those being shared between the different factories that's on purpose. Thanks for the attr_accessor thing, I didn't think you could do that for some reason

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13:44 <TMM> hanmac, do you like the way the factories work? would you write code like this?

13:44 <ccooke> apeiros: ... what glyph are those supposed to be? Doesn't seem to be visible here.

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13:45 <apeiros> ccooke: http://imgur.com/qHNGU5C

13:45 <ccooke> *laugh*

13:45 <ccooke> nice

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13:45 <ccooke> Unfortunately my font doesn't have those glyphs

13:45 <apeiros> your font is so 2012

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13:46 <sevenseacat> heh i didnt see those characters either

13:46 <ccooke> apeiros: that's just what I'd expect from a *ruby* developer ;-)

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13:48 <apeiros> you mean "developer"

13:48 <apeiros> we all know ruby "developers" are all "developers".

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13:49 <apeiros> only ASM *developers* are *developers*. the rest is developers.

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13:49 <ccooke> no, no, I think the ruby part is the main problem.

13:49 <ccooke> I mean, it's a great language, but such a shame about the community

13:49 * ccooke grins

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13:51 <Hanmac> apeiros: i thought ASM ones are *devilopers*

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13:51 <apeiros> no, no, malbolge is *evilopers*

13:51 <apeiros> d'oh, sorry, I accidentally the 'd'

13:51 <ccooke> hanmac: no, that's C developers who exploit undefined conditions

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13:51 <Hanmac> ccooke: hm no the only shame is in the dark part of the rails ;P

13:52 <ccooke> hanmac: heh. There is some, there

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13:52 <ccooke> I do have a few actual problems with the ruby community. The packaging issue, mainly.

13:53 <Hanmac> hm apeiros what do you think? should i make my own overload gem that supports method overloading? … (maybe with some magic i can get 'super' working)

13:53 <TMM> only bad C developers rely on UB

13:53 <apeiros> hanmac: errrr

13:53 * ccooke is primarily a sysadmin, and he really hates that his favourite language is such an absolute bastard to install sensibly on a server estate

13:53 <apeiros> hanmac: it's your time, up to you to waste it :-p

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13:54 <ccooke> TMM: and when demons shoot out of their nose, it is their own fault

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13:54 <TMM> ccooke, use the puppetlabs ruby packages if you use RHEL, then use FPM to automatically package all your gems and dependencies into separate RPMs

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13:54 <TMM> ccooke, it's the most sensible way I've found to manage ruby-on-servers

13:54 <ccooke> TMM: yeah, we've started to use those.

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13:55 <ccooke> I use Debian distros at home, though, which is a nightmare

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13:55 <TMM> debian should be much easier

13:55 <ccooke> IT *should* be

13:55 <ccooke> but it isn't

13:55 <TMM> the alternatives system makes it quite easy to handle

13:55 <TMM> if you use debian packages of course :)

13:55 <ccooke> Too much of the ruby community thinks that rvm is an acceptable installation method

13:56 <TMM> it's acceptable for testing

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13:56 <sevenseacat> yeah most people i know swear by rvm.

13:56 <ccooke> (I mean, it's a great developer and test tool, but it's terrible for end users or systems people)

13:56 <TMM> I like it on my development workstation a lot :)

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13:56 <TMM> yeah, what we really need is multiple roots of version information on a production system

13:56 <TMM> if we could have a BUNCH that would be great

13:56 <TMM> /sarcasm

13:57 <ccooke> in fact, I think the biggest issue I have with ruby as a whole is that there's very little actual thought for how an end user could use the code

13:57 <Hanmac> i curse rvm but its useful on Mac (because of the better install and automatic compiler finding )

13:57 <TMM> rvm is fantastic on desktops and ci systems

13:57 <ccooke> rvm is not something you should ever recommend a non-developer use

13:57 <TMM> I really like that I can just run rspec for 1.8, 1.9 and 2.0 without any issues (and consistently show 2.0 beating the pants of 1.8 speed wise)

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13:58 <TMM> but yeah... rvm is no solution for keeping servers up to date or automating deployments etc.

13:58 <ccooke> I have some code that runs faster on 1.8 than 2.0. But that's okay, because it's awful code and the replacement is faster on 2.0 ;-)

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13:58 <TMM> I like to make tons of little objects :P

13:59 <TMM> 2.0's gc is so much better it's not even funny

13:59 <TMM> I wonder if it comes close to jruby now

13:59 <cout> cute wittle objjewcts

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13:59 <ccooke> I should sort out rubinius packaging

13:59 <ccooke> it's looking really good

13:59 <TMM> my test suites don't pass on rubinius

14:00 <TMM> it's mostly just citrus actually

14:00 <TMM> maybe I should replace it with something else

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14:01 <TMM> most of my one-shot code actually runs with "GC.disable" :) if it runs out of cron it doesn't get GC

14:01 <TMM> is my rule

14:01 <TMM> :)

14:01 <ccooke> heh

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14:01 <ccooke> that makes sense

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14:01 <ccooke> I don't think my code would be good for that

14:01 <ccooke> or that would be good for my code, even

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14:02 <TMM> it's not going to make it slower

14:02 <ccooke> My irc bot has been running for a couple of weeks now, for instance :-)

14:02 <TMM> that's for sure

14:02 <TMM> oh yeah, of course

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14:02 <TMM> this is for one-shot stuff daemons get GC :)

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14:02 <ccooke> heh

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14:03 <ccooke> hmm. 1.3g virtual memory, 87m resident. No, I don't think I'll turn off GC for that.

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14:03 <TMM> it may help to disable gc before a request and enable it only just after

14:03 <ccooke> for a high-throughput server, aye

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14:04 <TMM> I've never actually done this

14:04 <ccooke> I think it's better to have a good GC rather than much around

14:04 <TMM> there's going to be some stuff to consider wrt exceptions and whatnot

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14:05 <ccooke> after all, turning off the GC for a request means you're *either* single threading your requests *or* eventually randomly enabling and disabling the GC all the time in the middle of other requests

14:05 <ccooke> better to code for minimal object creation and tune the GC for your workload

14:05 <ccooke> (although the tunables in ruby are nowhere near as mature as JAva, of course)

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14:10 <apeiros> ccooke: some also never GC and just kill the process :)

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14:13 <Hanmac> yeah, write the ruby script that it force-kill itself if its finish ; P

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14:17 <coderhs> hanmac: can we do that

14:17 <coderhs> :D

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14:19 <Morrolan> Have your script create tons of objects after it's done with its task, and wait for the system to kill the ruby process. ;)

14:19 <kaldrenon> What would be a clean way to sort an array of tuples by the second term? For example, if I have [[3,'b'], [1,'c'], [2,'a']], I want to get [[2,'a'], [3,'b'], [1,'c'] back from the sort

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14:20 <apeiros> kaldrenon: ary.sort_by { |a,b| b }

14:21 <kaldrenon> apeiros: Haha, I just realized that right after I hit enter. THanks. :)

14:21 Aryasam has joined #ruby

14:21 <apeiros> alternatively: ary.sort_by(&:last)

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14:21 <Hanmac> dam i wanted to type that! ;P

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14:21 <kaldrenon> I did ary.sort{ |a,b| a[1] <=> b[1] }

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14:22 <Hanmac> kaldrenon: i think your variant is slower

14:22 <kaldrenon> Hm, interesting

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14:24 <kaldrenon> I'm actually going to switch it to the &:last form - even if it's not a performance issue (the arrays in question are rarely > 10 elements), it prevents line wrap. :P

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14:26 <kaldrenon> Actually, that brings up a related question. So I'm doing this sort on the output of a map, so I have foo.map{|f| n = method_call(f); [f,n] if n }.compact.sort_by(&:last) - it occurs to me that I can probably clean that up

14:27 <kaldrenon> Can I fold the compacting and sorting into the block by changing the method I use, or similar?

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14:28 <kaldrenon> I suppose I can replace map with select and drop the compact.

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14:30 <kaldrenon> Wait, that doesn't work; I need the array of tuples, select gives me the original values

14:30 <kaldrenon> Sorry, I'll stop thinking out loud in the channel now. :P

14:30 <lectrick> I need someone to build a polynomial curve fit graph function for google docs. I'd do it myself but I don't have time. I'll be happy to pay them in BTC. :)

14:31 <sarbull> How should i handle "Cannot visit Proc"?

14:31 <Mon_Ouie> What gives you that error?

14:31 <waxjar> kaldrenon what does foo look like and what should it be mapped to?

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14:33 <kaldrenon> waxjar: foo starts out as an array of ints. I call a method which will return a string if the int meets a condition, nil otherwise. The end result I want is an array of [int,string] tuples, sorted by the string.

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14:34 <kaldrenon> using foo.select successfully rejects nils, but returns the original int, not [int,string]

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14:35 <waxjar> something like foo.map { |int| [int, that_method int] }.reject { |_, string| string.nil? }.sort_by { |_, string| string } ?

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14:37 <kaldrenon> waxjar: Well, my map is {|int| n = method(int); [c,n] if n} because method() returns nil when appropriate. So I can just do .compact on the end of the map (which I'm doing). I was wondering if I could fold it into the map, but I'm thinking it's okay as is.

14:38 <kaldrenon> Sorry, s/c/int/ there

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14:39 <Hanmac> you could also try: foo.each_with_object([]) {|int,a| a[int] = method(int) || nil} ;P

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14:42 <waxjar> kaldrenon: i guess it doesn't matter much, yeah. i like to have #map and friends return elements that look the same, feels a little cleaner :P

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14:42 <Mon_Ouie> If you want to map every item to 0, 1, or more items you can us flat_map (which is map and then concatenates all the results)

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14:42 <Mon_Ouie> (a.ka. collect_concat)

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14:43 <kraljev2> I know ruby has permutations built in

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14:43 <waxjar> he wants an Array of tuples

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14:44 <kraljev2> [[1,4],[1],[2,3]] would procude [1,1,2], [1,1,3],[4,1,2],[4,1,3]

14:44 <kraljev2> how to do that

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14:45 <bean> kraljev2: thats not a permutation.

14:45 <bean> :)

14:45 <kraljev2> i know

14:45 <Hanmac> Mon_Ouie: hm i had an idea for a moment, what about some kind of Array-like structure that has sorted_insert ? so that each time you add an element inside it its automatically added to the right place?

14:46 <kraljev2> I just wanted to say ruby has a lot of combinatorical function built-in

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14:46 <kraljev2> it is a product of some sor

14:46 <kraljev2> *sort

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14:46 <Mon_Ouie> hanmac: You could implement that efficiently (log(n) insertion time) using binary trees

14:47 <Hanmac> kraljev2:

14:47 <Hanmac> >> a=[[1,4],[1],[2,3]];a.shift.product(*a)

14:47 <eval-in_> Hanmac => [[1, 1, 2], [1, 1, 3], [4, 1, 2], [4, 1, 3]] (https://eval.in/53195)

14:48 <bean> nice, hanmac

14:48 <kraljev2> >> a = [[1,4],[1],[2,3],[10,11]]; a.shift.product(*a)

14:48 <eval-in_> kraljev2 => [[1, 1, 2, 10], [1, 1, 2, 11], [1, 1, 3, 10], [1, 1, 3, 11], [4, 1, 2, 10], [4, 1, 2, 11], [4, 1, 3, 10], [4, 1, 3, 11]] (https://eval.in/53196)

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14:49 <kraljev2> really nice, thanks

14:49 <kraljev2> a = [[1,4],[1],[2,3,4]]; a.shift.product(*a)

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14:49 <kraljev2> >> a = [[1,4],[1],[2,3,4]]; a.shift.product(*a)

14:49 <eval-in_> kraljev2 => [[1, 1, 2], [1, 1, 3], [1, 1, 4], [4, 1, 2], [4, 1, 3], [4, 1, 4]] (https://eval.in/53197)

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14:50 <Hanmac> kraljev2: there is a ticket for a class method ala Array.product: https://bugs.ruby-lang.org/issues/8970 but its not commited yet

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14:51 <kraljev2> this'd really useful

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14:53 <kraljev2> Who here agree ruby needs method naming overhaul

14:53 <bean> nope

14:54 <pontiki> nope

14:54 <kraljev2> there are many duplicates

14:54 <pontiki> i don't have a problem with that

14:54 <kraljev2> Array#take and Array#first

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14:54 <kraljev2> for example

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14:55 <kraljev2> a lot of legacy stuff

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14:55 <pontiki> map/collect, inject/reduce...

14:55 <pontiki> so what?

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14:55 <kraljev2> why do we have #delete_if and #reject

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14:56 <kraljev2> it would be more rubyish if we had #reject and #reject!

14:56 <Mon_Ouie> We do have those

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14:57 <Mon_Ouie> And #delete_if and #reject! are slightly different in that reject! returns nil if no change was made

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14:57 <kraljev2> Well, that is not KISS

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14:58 <kraljev2> Still, ruby is a great language, I just miss a new major version 3.0

14:58 <kraljev2> where we'd throw out all legacy restrictions

14:59 <kraljev2> for example iterators not being lazy by default

14:59 <kaldrenon> When dealing with a hash, is there a concise way to do a create_or_append action for a field? I know I can do foo[:bar] = foo[:bar] ? foo[:bar] + new_val : [new_val] for example, but surely there's a better way? (this is in a situation where I -don't- want to create the hash with Hash.new([])

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14:59 <kraljev2> Hash#default

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15:00 <kraljev2> #default=

15:00 <kraljev2> sorry

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15:00 <sevenseacat> 3.0? we just got 2.0

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15:00 <kraljev2> 2.1 is on the way

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15:01 <sevenseacat> yes, but we dont have it yet

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15:03 <Hanmac> kaldrenon: important: when using Hash + defaut_value: foo[:bar] += new_val works, but foo[:bar] << new_value does not

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15:04 <kaldrenon> >> a = {}; a.default = []; a[:foo] << 1; a

15:04 <eval-in_> kaldrenon => {} (https://eval.in/53198)

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15:04 <kaldrenon> >> a = {}; a.default = []; a[:foo] += 1; a

15:04 <eval-in_> kaldrenon => no implicit conversion of Fixnum into Array (TypeError) ... (https://eval.in/53199)

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15:05 <Hanmac> that exactly what i mean

15:05 <kaldrenon> Interesting.

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15:05 <Hanmac> hm ok its += [new_value]

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15:05 <apeiros> kaldrenon: you mutate the default value

15:05 <kaldrenon> >> a = {}; a.default = []; a[:foo] += [1]; a

15:05 <eval-in_> kaldrenon => {:foo=>[1]} (https://eval.in/53200)

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15:06 <apeiros> >> a = {}; a.default = []; a[:foo] << 1; a.default

15:06 <eval-in_> apeiros => [1] (https://eval.in/53201)

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15:06 <kaldrenon> apeiros: That is very helpful to know.

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15:06 <waxjar> you should use Hash.new { |hash, key| hash[key] = [] } or #default_proc=

15:07 <apeiros> i.e., `a[:foo] << 1` --> `a[:foo]` returns the default value, then `<< 1` pushes 1 to the default value. you do not assign a value to a key in that code.

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15:07 <Hanmac> apeiros: hm i had an idea while you was away, what about an Array like structure that has sorted_insert? so when you add an element its automatically inserted into the right place?

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15:08 <Hanmac> waxjar: important info: default_proc maybe not always an option because the Hash cant be Mashalled anymore

15:08 <kaldrenon> waxjar: What are the advantages of that approach? Is it creating a new object each time as opposed to referencing the same one?

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15:08 <apeiros> hanmac: that's called a heap ;-)

15:08 <waxjar> yes, exactly that kaldrenon

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15:08 <apeiros> hanmac: but yes, you could do it with an array too

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15:09 <Morrolan> kaldrenon: It executes the supplied proc whenever a default value is needed, and uses its return value for the default value, yea.

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15:10 <apeiros> depending on what your aim is, you'd choose a different underlying datastructure for a sorted collection

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15:10 <workmad3> kaldrenon: that particular proc also sets the value to the hash key

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15:10 <Hanmac> hm i had an imagination for an Array like object that has callback functions like before_insert, after_insert, before_sort, after_sort etc … (so you can make arry << obj, and the arry will be sorted after something was inserted … ;P )

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15:10 <workmad3> kaldrenon: whereas a normal default value doesn't set the key that wasn't present

15:11 <apeiros> hanmac: you can have my old SortedArray code if you want

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15:11 <kaldrenon> Could you show me an example of using #default_proc= ? I'm working with a hash that's passed as an argument, and I want to set a default after the fact.

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15:11 <workmad3> kaldrenon: gonna go out on a limb here and suggest 'hsh.default_proc = proc{|h, k| h[k] = []}' :P

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15:11 <hoelzro> yikes

15:12 <Hanmac> apeiros: hm ok maybe at next weekend

15:12 <hoelzro> I wouldn't alter a hash like that

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15:12 <Morrolan> workmad3: Oh, does the proc need to take care of setting the default value itself? I thought the value it returns would be used.

15:12 <kaldrenon> workmad3: Aha. I have not worked with procs before. Thanks

15:12 <hoelzro> sounds like it could potentially cause headaches from the dev using it

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15:12 <workmad3> Morrolan: depends on if you want the value to be placed into the hash or not

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15:13 <workmad3> Morrolan: if you don't set it, then the value is returned, but the key isn't set in the hash

15:13 <Morrolan> I see.

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15:13 <Morrolan> And yes, when setting Hash#default_proc I normally want a value to be set in the hash. ;D

15:13 <workmad3> >> a = Hash.new{"hi"}; a[:foo]; a.keys

15:13 <eval-in_> workmad3 => [] (https://eval.in/53202)

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15:14 <workmad3> Morrolan: yeah, the common case is to initialize to an array or a hash, so you'd want it in the hash :)

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15:15 <kaldrenon> >> a = Hash.new{|h,k| h[k] = "hi"}; a[:foo]; a.keys

15:15 <eval-in_> kaldrenon => [:foo] (https://eval.in/53203)

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15:15 <kaldrenon> I learned a thing!

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15:15 <Hanmac> kaldrenon: if you need Marshal remind this:

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15:15 <Hanmac> >> Marshal.dump(Hash.new {})

15:15 <eval-in_> Hanmac => can't dump hash with default proc (TypeError) ... (https://eval.in/53204)

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15:17 <apeiros> >> dp = proc { |h,k| h[k]=[] }; h = Hash.new(&dp); h.default_proc = nil; h2 = Marshal.load(Marshal.dump(h)); h2.default_proc = dp; h2[:foo]

15:17 <eval-in_> apeiros => [] (https://eval.in/53205)

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15:17 <apeiros> tadaa

15:17 <apeiros> that'd be the workaround

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15:18 <Hanmac> i need to write more Hash and Array like structures ;p

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15:18 <Hanmac> apeiros: look https://bugs.ruby-lang.org/projects/ruby-trunk/repository/revisions/43107 one of my requests are in ruby CORE ;D

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15:22 <apeiros> hanmac: I don't understand

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15:22 <platzhirsch1> That's awkard, any idea why `xclip some_file.txt` takes multiple seconds to execute on Ruby 2.0.0 as opposed to system('xclip some_file.txt') which is instantly?

15:23 <platzhirsch1> System uses a fork, backticks just opens a pipe, but I don't see explaining this

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15:23 <hoelzro> platzhirsch: strace it?

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15:24 <Hanmac> apeiros: didnt you say last time that it would be the end of the world if my code would go into ruby-core? ;D

15:24 <platzhirsch> hoelzro: oh, didn't know this tool yet

15:24 <apeiros> hanmac: that wasn't me I think

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15:24 <Hanmac> oh ok ;P

15:24 <hoelzro> strace is one of the most useful tools in the toolbox =)

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15:25 <apeiros> I'm only cruel to people who deserve it (or know that I'm kidding)

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15:26 <platzhirsch> hoelzro: sweet, although I feel a bit stunned by all the system calls that are printed now :D

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15:26 <platzhirsch> ah right, I wanted to see where it hangs with Ruby

15:26 <hoelzro> platzhirsch: you can filter with -e trace=$SYSCALL

15:26 <platzhirsch> hoelzro: thanks :)

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15:27 <hoelzro> but since you're looking for which system call, that might not help here =/

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15:27 <platzhirsch> I don't know what I am looking for

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15:27 <hoelzro> you're looking for any system call that blocks for a few seconds

15:28 <hoelzro> strace might not help

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15:28 <platzhirsch> that's pretty awesome I have attached it to a pry session

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15:28 <platzhirsch> prints everytime I type something

15:28 <hoelzro> but it's a good first step, since it reveals a lot of information with little investment

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15:28 <hoelzro> you can also attach to an existing process with -p

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15:28 <hoelzro> I wouldn't use it in pry =/

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15:29 <platzhirsch> too much noise?

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15:29 <hoelzro> yeah

15:29 * hoelzro had to use strace last week to debug sshd

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15:29 <hoelzro> that was fun =/

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15:29 <platzhirsch> well obviously it's stuck at a read operation, but that doesn't explain the behavior

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15:30 <hoelzro> what's it reading?

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15:30 <platzhirsch> I have no idea, xclip does not return anything

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15:31 <hoelzro> well, you see a read blocking in strace, don't you?

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15:31 <platzhirsch> yes

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15:31 <hoelzro> can you ls -l /proc/$PID/fd to find out what it's reading from?

15:31 <platzhirsch> read(7, "`xclip text.txt`\n", 8192) = 17 ... read(7, "", 8192) = 0

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15:33 <hoelzro> is your entire script `xclip text.txt`?

15:33 <platzhirsch> yes

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15:33 <hoelzro> and *that* read is blocking for a while/

15:33 <platzhirsch> /dev/pts/1,2 and 3 and 5 pipes

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15:33 <hoelzro> because that seems to be Ruby reading your script

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15:34 <platzhirsch> oh you are right

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15:34 <platzhirsch> but the read after that is what is actually returned, an empty string

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15:35 <bean> why would you use ruby to invoke a shell command if thats all you're doing

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15:35 <hoelzro> Ruby's probably doing a while(read(fd, buffer, SIZE) != 0)

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15:35 <hoelzro> so it performs a useless read at the end

15:35 <hoelzro> bean: debugging

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15:36 <platzhirsch> bean: Just trying to understand the behavior, I don't need this at all and if I would I would invoke system

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15:36 <platzhirsch> hoelzro: but that while would have a time out, wouldn't it?

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15:36 <hoelzro> no, because there's nothing left in the file

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15:37 <hoelzro> it would go into kernel land, and kernel will (more or less) immediately reply "there's nothing left"

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15:38 <platzhirsch> hoelzro: https://gist.github.com/platzhirsch/d6e7b0fcd6acaef49154

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15:39 <hoelzro> hmm

15:39 <hoelzro> well

15:39 <hoelzro> here 7 is a pipe

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15:39 <hoelzro> you should probably use strace -f to trace across forks

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15:40 <hoelzro> hmm

15:40 <hoelzro> your child process exits

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15:40 <hoelzro> odd that read blocks for a while after the child exits

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15:41 <platzhirsch> hoelzro: do you think it has to do with Resource temporarily unavailable here? https://gist.github.com/platzhirsch/d6e7b0fcd6acaef49154

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15:41 <hoelzro> hmm

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15:41 <hoelzro> what's 3? I assume a socket?

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15:42 <hoelzro> the blocking would make sense if the child process spawned another child that does the writing to the pipe

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15:43 <hoelzro> huh

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15:43 <hoelzro> OT, but I noticed you're based in Berlin.

15:43 <hoelzro> I was just there this weekend =)

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15:44 <platzhirsch> how did you know?

15:44 Valesk has quit [Ping timeout: 256 seconds]

15:44 <platzhirsch> cool thing

15:44 <hoelzro> Github =)

15:44 <platzhirsch> ah right :P

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15:47 <platzhirsch> it polls, so it waits for an event on a file descriptor

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15:48 <platzhirsch> and this poll has a timeout which runs out

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15:49 devoldmx has quit [Write error: Broken pipe]

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15:49 <platzhirsch> but the timeout is higher than it's actually waiting, well.. whatever, I am giving up, at least I have learnt something

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15:49 <hoelzro> hmm

15:49 <hoelzro> well

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15:49 <hoelzro> it'll poll for less than the timeout if data is available

15:49 <hoelzro> whether it's real data for an EOF

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15:50 <hoelzro> s/for/or/

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15:56 <platzhirsch> hoelzro: My guess is that it tries to read from the pipe, but the pipe is not available, freed yet, so it does a poll. The pipe gets freed again and the execution finishes

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15:57 <hoelzro> that's what's so weird; according to the trace, the child has exited

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15:57 <hoelzro> so the pipe's write end should be closed

15:58 <hoelzro> so a read should immediately return

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15:58 <platzhirsch> huh

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15:59 <platzhirsch> I enter xclip test.txt it finished, when I enter xclip -verbose text.txt I get: Reading text.txt and the Waiting for selection requests, Control-C to quit

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15:59 <platzhirsch> and then it quits after a time

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16:01 <platzhirsch> Apparently Xclip does not close stdout when it's done

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16:01 <nhmood> Is there an easy way to reference Constants that are defined within a Class outside of the class (without the use of MyModule::MyClass::Constant)

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16:02 <platzhirsch> hoelzro: http://sourceforge.net/p/xclip/bugs/9/

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16:03 <hoelzro> interesting

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16:05 <s2013> anyone here does nlp with ruby

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16:06 <platzhirsch> hoelzro: it's getting really weird, if I try select the console output while it's waiting, it finishes instantly :P

16:06 <s2013> also is there some sort of speech recognition gem for ruby

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16:07 <hoelzro> platzhirsch: I'm guessing xclip is waiting for a selection, and you're giving it one?

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16:07 <platzhirsch> well I just mark it with my mouse

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16:07 <hoelzro> that populates the selection on X

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16:08 <hoelzro> did you know that you only need to select + middle click on X?

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16:08 <platzhirsch> hoelzro: yes

16:08 <hoelzro> ok, just checking =)

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16:10 <platzhirsch> hoelzro: you are right

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16:10 <platzhirsch> I just printed the content of the XA_PRIMARY the default one, and it is what I have selected

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16:11 <platzhirsch> but is that really supposed to happen? Shouldn't the file content go into the selection

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16:13 <hoelzro> that would make sense...

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16:14 <hoelzro> that's odd

16:14 * hoelzro goes home

16:14 <platzhirsch> so it seems not to terminate at all if I don't do something

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16:14 <platzhirsch> hoelzro: anyway, thanks a lot for showing me strace :)

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16:53 <b3hnam> Here is my code http://dpaste.com/1409900/ the output of "puts client" is #<Twitter::REST::Client:0x00000002a99cf8> How can I find out the methods

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16:57 <heftig> try (client.methods - Object.methods)

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16:58 <_br_> Anyone here have a snippet for warden facebook/twitter login strategy? (running sinatra)

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17:00 <glaksmono> anyone is around?

17:00 <glaksmono> what's a way to format the active record result ?

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17:01 <Hanmac> glaksmono: #rubyonrails

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17:02 <_br_> glaksmono: look at awesome_print gem

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17:07 <a1ph4g33k> good morning all.

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17:09 <havenwood> g'morn

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17:43 <kraljev2> someone suggested this before

17:43 <kraljev2> temp.shift.product(*temp)

17:43 <kraljev2> for combinatorical product

17:43 <kraljev2> Do you have any idea how to make it lazy

17:44 <kraljev2> except recursive def

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17:46 <apeiros> kraljev2: enum_for(:product, *args)

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17:47 <volty> hi, is there a good gem for ruby parsing || tokenizing ?

17:47 <^conner> is there a pure rspec equivalent of aruba for cucumber?

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17:48 <dkamioka> volty: which type of parsing?

17:48 <dkamioka> volty: to tokenize, the .split i think is enough, depending of the string.

17:48 <volty> ruby source code

17:48 <dkamioka> oh.

17:49 <apeiros> volty: there's the one by whitequark (over in #ruby-lang), also rubys own ripper

17:49 <volty> dkamioka: i'm not not this low level :)

17:49 <dkamioka> you want some lexic and syntatic parser, like in compiler's subject ?

17:49 <apeiros> and zenspiders parsetree (I think that was the name)

17:49 <dkamioka> I took the compiler class in college... i used somthing like that....

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17:50 <^conner> dkamioka, treetop is an option too I believe

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17:50 <^conner> dkamioka, there's also racc which is like lex/yacc

17:50 <dkamioka> hmmm quick question, ||= sets if nil what does |= do? And why?!?!?!!? I tried and it set to "true"

17:50 <volty> dkamioka: I already wrote a tokenizer that I needed for scanning my files

17:51 <volty> i'm just trying to see what's there -- for future use

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17:51 <dkamioka> volty: unfortunately I had some java thing not ruby, so cant help.

17:51 <volty> apeiros: thx, going to goolge

17:51 <^conner> volty, I would look into racc if it's something serious as the generated code doesn't have runtime deps

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17:51 <dkamioka> apeiros, ^conner: nice to know some references, will keep that for future too.. thanks.

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17:51 <^conner> volty, but I have never used racc :)

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17:57 <volty> ^conner: i tried racc long time ago, though without a real goal // I'll look again if I start thinking about capturing class dependencies // for now I'll go to see what is the ruby's own ripper

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17:58 <apeiros> volty: hu? I understood you wanted to parse ruby source code - did I get that wrong? (or did you try that with racc a long time ago? or is that entirely disconnected?)

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17:58 <cubicme> hi, is there any clean way to map a hash to anoter hash, except converting it to array and hash again?

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17:58 <apeiros> cubicme: no

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17:59 <apeiros> I mean, you could do it without converting. but I don't think it'd be any cleaner: mapped={}; source.each do |k,v| mapped[map(k)] = map(v) end

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18:02 <cubicme> apeiros: thanks, right now i'm doing mapped = Hash[source.map { |k,v| [k,v] }]

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18:05 <volty> apeiros: i just wrote an enumerator that generates ruby tokens. For now it's enough for intended use of indexing & mapping to files. Then I was thinking about mapping to classes & modules and, before I proceed to think about ... wanted to see what is already ready there

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18:07 <kraljev2> apeiros:

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18:07 <volty> for now it's all about searching on source files

18:07 <kraljev2> sorry, your solution isn't lazy

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18:07 <kraljev2> enum_for doesn't do it

18:07 <kraljev2> temp = [[1,2]] * 50

18:07 <kraljev2> p temp.shift.product(*temp).take(10)

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18:07 <kraljev2> this announces out of ram

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18:08 <apeiros> cubicme: yeah, IMO the nicer variant

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18:09 <kraljev2> oh, nevermind

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18:09 <apeiros> kraljev2: sorry but enum_for is lazy.

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18:09 <volty> no no

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18:09 <kraljev2> my fault, thanks :)

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18:10 <volty> kraljev2: it's not your fault, and neither his

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18:10 <volty> if you want lazy you have to reimplement the product func

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18:11 <volty> in a way that returns an enum

18:11 <apeiros> volty: no

18:11 <volty> why?

18:11 <apeiros> that's precisely what enum_for does.

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18:11 <volty> not in this case

18:11 <apeiros> yes, also in this case.

18:11 <volty> product returns an array and not an enum

18:11 <volty> am I wrong?

18:12 <apeiros> if you do something with the enumerator which in turn does not return an enumerator, that's not due to enum_for

18:12 <apeiros> you're wrong

18:12 <apeiros> enum_for is NOT about return value

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18:12 <apeiros> enum_for is about yielding.

18:12 <volty> yes, i know very well, i was playing with enumerators

18:12 <apeiros> >> [1,2].product([3,4,5])

18:12 <eval-in_> apeiros => [[1, 3], [1, 4], [1, 5], [2, 3], [2, 4], [2, 5]] (https://eval.in/53209)

18:13 <apeiros> >> [1,2].enum_for(:product, [3,4,5])

18:13 <eval-in_> apeiros => #<Enumerator: [1, 2]:product([3, 4, 5])> (https://eval.in/53210)

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18:13 <Mon_Ouie> volty: If you call product with a block it will yield the elements of the product instead of returning the array. That's all you need to be able to use #enum_for

18:14 <volty> naaa

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18:14 <volty> i saw now what we are talking about, sorry, i didn't read well the kraljev2's code

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18:15 <apeiros> >> $d=[]; def foo; $d<<1;yield(1); $d<<2;yield(2); $d<<3;yield(3);$d<<4;end; enum_for(:foo).first(2); $d

18:15 <eval-in_> apeiros => [1, 2] (https://eval.in/53211)

18:15 <apeiros> lazy.

18:15 <apeiros> it does not evaluate the rest of the method.

18:15 <s2013> whats the easiest way to say difference between load and require

18:16 <volty> yes, i was playing with reading one line at a time a whole bunch of files with file mask

18:16 <apeiros> s2013: define 'easiest'.

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18:16 <s2013> i guess.. shortest way

18:16 <volty> even with IO.foreach(fn) ...

18:16 <s2013> ive been reading and i sort of get it

18:16 <apeiros> s2013: load does not load native code. load requires the suffix. load can/will load a file multiple times.

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18:16 <maasha> hey, I am looking for a map like method that iterates over a specified number of times, but still returns a enum.

18:16 <volty> i found something strange with ranges

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18:16 <s2013> gotcha

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18:17 <volty> going to dinner now, later I'll find the code and paste

18:18 <a1ph4g33k> bad timing ... the day after I spent a couple of hours to do a programming challenge for newrelic ( for a ruby instrumentation engineer position ) ... the position was removed from the website ... *sigh*

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18:22 <b3hnam> Is a better way to this substr : a[0,a.length-1] ?

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18:22 <b3hnam> a[0,a.length-1]

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18:23 <onewheelskyward> how about a[0..-1]?

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18:24 <MrZYX> b3hnam: .chop

18:24 <lectrick> b3hnam: what onewheelskyward said

18:25 <MrZYX> no, wait, actually that's the entire string, so just a

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18:25 <MrZYX> or .dup if you need a copy

18:25 <lectrick> string_or_array[0..-1] is likely the fastest way to lop off the last element

18:25 <waxjar> it's -2, actually

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18:25 <lectrick> actually, it's not

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18:25 <a1ph4g33k> do you want the element returned when it is removed ? or just chopped off ?

18:25 <MrZYX> we need b3hnam to clarify what behavior he wants ;)

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18:26 <onewheelskyward> >> "abcde"[0...-1]

18:26 <eval-in_> onewheelskyward => "abcd" (https://eval.in/53212)

18:26 <onewheelskyward> >> "abcde"[0..-1]

18:26 <eval-in_> onewheelskyward => "abcde" (https://eval.in/53213)

18:26 <lectrick> fuck it is

18:26 <lectrick> fuck. sorry

18:26 <lectrick> seriously?

18:26 <onewheelskyward> right. either triple dot or double dot negative plus one.

18:26 <lectrick> waxjar: my bad!

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18:27 <lectrick> i don't normally screw that up. /shocked. Maybe I was thinking of the triple dot version

18:27 <MrZYX> >> "abcde".chop

18:27 <eval-in_> MrZYX => "abcd" (https://eval.in/53214)

18:27 <waxjar> it's because if it were to be 0 ruby wouldn't know wether to start from the beginning or the end i guess

18:28 <lectrick> chop works well too

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18:30 <apeiros> lol

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18:37 <NinjaPenguin> Does hash have a .reverse! method?

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18:39 <levberlin> Hey guys - I'm helping a hackathon this weekend by having remote experts available that can't make it to NYC. If you want to help out for just a few hours, you can do so here: https://onscreenexpert.com/feast. Can also join the discussion on HN: https://news.ycombinator.com/item?id=6516895.

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18:40 <NinjaPenguin> Never mind, I completely missed the fact that sort_by returns an array which can be reversed.

18:40 <riceandbeans> not a fan of NYC

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18:41 <levberlin> riceandbeans: that's why you can help out from home :)

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19:01 <volty> https://eval.in/private/7976bfd38aa94c

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19:02 <volty> not the same object, i checked that

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19:05 <volty> but: https://eval.in/private/0c579b2143b9f8

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19:08 <volty> do not waste your time: https://eval.in/private/4bc97bdd5360f3

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19:11 <Hanmac> volty: whats wrong with them? i mean what did you excepted?

19:11 <volty> isn't that obvious ?

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19:12 <volty> if objects are 'a'..'b', 'a'..'c', i expect an array of ['a'..'b', 'a'..'c']

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19:13 <[spoiler]> hanmac, if you check his first link (https://eval.in/private/7976bfd38aa94c) I believe he expected the to_a/map to return:["a".."b", "a".."c", "a".."d", "a".."e", "a".."f"]

19:13 <Hanmac> haha look what i did try: https://eval.in/private/496f272de62482 ;D

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19:13 <[spoiler]> Frankly, I expected it too

19:13 <volty> of course, the objects are checked (shown) with each and inside the map proc

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19:14 <volty> it is not consistent.

19:14 <Hanmac> https://eval.in/private/13b084333be783 << workd

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19:15 <volty> I can make it work in many ways

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19:15 <volty> the prob. is why this bug / inconsistency

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19:16 <MrZYX> looks like range doesn't copy the object, so you modify the the object you gave to the earlier ranges you created

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19:18 <apeiros> volty: check o.end.object_id in your first one

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19:18 <apeiros> you're using succ!, so you're yieling the same string as range end all the time

19:18 <apeiros> *yielding

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19:18 <digitalcake> I just noticed something odd, Array.new(3, MyObject.new ) will produce 3 MyObjects but they will all be the same instance.

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19:19 <apeiros> digitalcake: use block form

19:19 <apeiros> Array.new(3) { MyObject.new }

19:19 <digitalcake> thanks.

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19:19 <apeiros> yw

19:20 <volty> apeiros: there's the each and there's the map that should return the same result

19:20 <volty> your explanation is ok, i'm not going to check it either

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19:21 <apeiros> volty: which example? (you should name/number them if you make multiple - it's not nice playing guessing games on which you mean)

19:21 <volty> the same object SEMANTICALLY

19:21 <Hanmac> hm i need to rebuild my ruby … for some reason i found a way to make SEGFAULTs with Range.new … oO

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19:21 <volty> the first one, i print the object from inside the map block before returning it

19:22 <apeiros> volty: again: *which example*

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19:22 <apeiros> you pasted 3

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19:22 <volty> the first https://eval.in/private/7976bfd38aa94c

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19:23 <[spoiler]> volty: the `bg` variable is the same in all of the ranges, that's why you get a..f everywhere

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19:23 <apeiros> volty: again, your range end is staying the same object

19:23 <apeiros> gimme a minute

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19:23 <[spoiler]> because "bg" is the reference to the same object

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19:24 <[spoiler]> succ! modifies the character in place

19:24 <[spoiler]> object*

19:24 <[spoiler]> it doesn't create a new one

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19:24 <apeiros> volty: http://pastie.org/8387519

19:24 <apeiros> this is what you're doing

19:24 <[spoiler]> this, for example, will solve the problem: https://eval.in/private/ef9b658658af87

19:24 <volty> let me finish with a question: should that be the expected behavior?

19:25 <[spoiler]> volty, yes

19:25 <apeiros> and you're surprised that when you look between the succ!'s, you get different results, but at when looking at it in the end, all are the same.

19:25 <apeiros> and yes, that's expected behavior.

19:25 <Hanmac> apeiros: can you try some code on your mashine? it crashs for me but it works for eval.in for some reason … (https://eval.in/private/988430e10aa948 … i tested it with ruby-trunk)

19:25 <volty> ok

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19:25 <[spoiler]> apeiros lol at that example

19:26 <apeiros> [spoiler]: well, that's what he does, unrolled.

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19:26 <apeiros> and without the range part. since that part is irrelevant to what he observes.

19:26 <[spoiler]> hanmac, it worked for me

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19:26 <apeiros> hanmac: Segmentation fault: 11

19:26 <Hanmac> yeah thats what i mean oO ;P

19:27 <apeiros> bug

19:27 <[spoiler]> irb(main):025:0> RUBY_VERSION

19:27 <[spoiler]> => "2.0.0"

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19:27 <[spoiler]> on Windows

19:27 <apeiros> RUBY_DESCRIPTION -> ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-darwin12.3.0]

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19:27 <Hanmac> yeah i am on darwin too ..

19:27 <[spoiler]> oh right, let me print that too

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19:28 <Hanmac> (for some reason it works for eval.in)

19:28 <[spoiler]> RUBY_VERSION #=> "ruby 2.0.0p247 (2013-06-27) [i386-mingw32]"

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19:28 <[spoiler]> eval.in's RUBY_DESCRIPTION: ruby 2.0.0p0 (2013-02-24 revision 39474) [i686-linux]"

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19:29 <Hanmac> hm it could be an 64 bit problem? oO

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19:30 <[spoiler]> Report a bug, if it wasn't already reported

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19:32 <Hanmac> currently flling the formula

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19:34 <Hanmac> hm can someone try it with 64bit ruby on linux?

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19:35 <havenwood> hanmac: fails on: "ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-linux]"

19:36 <banisterfiend> havenwood are you decent at coffeescript?

19:36 <havenwood> banisterfiend: nope

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19:36 <banisterfiend> ah np :)

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19:36 <havenwood> banisterfiend: been poking around at ClojureScript :P

19:36 <havenwood> banisterfiend: CoffeeScript looks neat, but i haven't used it enough to be procient ;(

19:37 <deception> Am I asking for trouble using activerecord outside of rails?

19:37 <deception> I'm thinking of just using datamapper then

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19:38 <havenwood> deception: AR is meant to be usable outside Rails. DM actually is funnily also active record pattern, but the upcoming successor to DM, rom-rb, is data mapper pattern.

19:38 <havenwood> deception: Prolly too early to use ROM, but looks neat. :)

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19:38 <deception> Haven't heard of ROM, I'll have to go check it out

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19:39 <aedorn> hanmac: it works on Rubinius 2.0 x86_64 ;)

19:39 <havenwood> https://github.com/rom-rb

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19:41 <havenwood> hanmac: SystemStackError: stack level too deep on JRuby :P

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19:41 <Hanmac> havenwood: hm yeah thats why i rescue the StackError (or did JRuby ignore that?? )

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19:43 <havenwood> hanmac: it ignored it

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19:43 <Hanmac> HUCH!! (another reason why i hate JRuby!)

19:43 <havenwood> <3 JRuby

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19:45 <Hanmac> hm ok then imo its also an bug in jruby, because imo it should not make an StackError

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19:46 <dllama> hey guys. hoping someone might be able to point me in the right direction here. I'm using mongo in a rails4 app. but can't seem to figure out how to do eager loading for an association and google results haven't worked for me

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19:47 <havenwood> hanmac: https://gist.github.com/havenwood/4a618f95d1f16473555a

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19:47 <[spoiler]> havenwood, Oh! rom-rb seems pretty badass, actually

19:47 <havenwood> dllama: Might have better luck with Rails issues in #RubyOnRails

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19:48 <havenwood> [spoiler]: Yeah, i'm looking forward to it!

19:48 <dllama> havenwood, I've asked there, was ignored.

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19:48 <dllama> went to #mongo and #mognoid too, and still can't seem to find what i'm looking for

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19:49 <Hanmac> havenwood: i try to file the bug on #jruby … hm i will look how long it takes until they react of my call that i found a bug

19:49 <zenloop> Hey guys, simple question, how do I load a cookbook from a file into shef?

19:49 <havenwood> hanmac: :D

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19:50 <Hanmac> and i need to kick karma in the ass, i mean why am i the person that found this creepy bugs? it seems that i am to experimentalphily ;P

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19:51 <[spoiler]> zenloop, is shef a library/gem or are you kidding? haha

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19:51 <havenwood> hanmac: You are like the truffle pig of seg faults!

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19:51 <nhmood> I thought it was Chef? http://docs.opscode.com/just_enough_ruby_for_chef.html

19:52 <zenloop> spoiler: http://docs.opscode.com/chef_shell.html

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19:52 <Hanmac> havenwood: is that the game "pick the ruby interpreter with an stick until it segfaults" ? ;P

19:52 <havenwood> haha

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19:53 <nhmood> Is there a way to add arbitrary code to every method in a class in one place?

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19:54 <nhmood> e.g. If I want a debug print I have to add debug_print "This is #{self}" to every method I write

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19:54 <nhmood> Is there a way to bake that into every method that is created under a given class

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19:54 <[spoiler]> nhmood, only thing that comes to mind is loading + parsing the file, injecting your code, evaling it... I don't think you can "open" a method?

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19:54 <lectrick> This is probably heresy, but I believe unit tests should live inside the class they are testing

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19:55 <lectrick> thoughts? apeiros? banisterfiend?

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19:56 <lectrick> I wrote a little framework to help that work and it seemed to work well. "Building" the class by running it, runs the unit test.

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19:56 <havenwood> hanmac: maybe a silly question, but does MRI successfully rescue SystemStackError?

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19:57 <lectrick> Sorry, by running it I meant running the class directly (not including it from another class)

19:57 <Hanmac> havenwood: hm yeah it does

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19:58 <havenwood> hanmac: figured...

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20:00 <apeiros> lectrick: quoi?

20:00 <[spoiler]> apeiros, > <nhmood> Is there a way to add arbitrary code to every method in a class in one place?

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20:00 <[spoiler]> <nhmood> e.g. If I want a debug print I have to add debug_print "This is #{self}" to every method I write

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20:00 <[spoiler]> <nhmood> Is there a way to bake that into every method that is created under a given class

20:01 <[spoiler]> Oh, my irc client can display hiragana and katagana. Plesantly surprised

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20:02 <apeiros> nhmood: see Module#method_added

20:02 <apeiros> and yes

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20:02 <apeiros> not as nicely as an AOP language would allow you to, though.

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20:03 <[spoiler]> apeiros, I think you misunderstood. He wants to add code *into* the method

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20:03 <apeiros> [spoiler]: define *into*. if it's at the start or the end: yes. within the method: no.

20:03 <havenwood> nhmood: you wanna know when a method is added to the class or when it's called?

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20:03 <nhmood> I have a generic debug message that identifies which method I am currently in (used for debugging) (always at the beginning of the method)

20:04 <nhmood> Right now I manually add this one liner to every method I write

20:04 <apeiros> [spoiler]: see - at the beginning. and that's possible.

20:04 <nhmood> Using method_added?

20:04 <apeiros> nhmood: that's a rather bad solution to your problem, though.

20:04 <nhmood> apeiros: What would you suggest instead

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20:05 <apeiros> well, you won't like it as it's not a recipe: debug in a saner fashion :)

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20:06 <apeiros> for existing methods you can use instance_methods to iterate over them

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20:07 <volty> nhmood: i use, like you, manual debugging but not with the method name, just numbers or variables with binding, file number and line number

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20:07 <volty> you have to pass to classic debugging for that

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20:08 <nhmood> Yeah, it is more of a general debugging tool than oen I use to fix specific problems

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20:08 <[spoiler]> apeiros, Hmm. How would you inject code into the method? I know of a way to run code before or after the method that's called, but I can't think of a way to inject code into one

20:09 <nhmood> It is easier when I notice unexpected behavior to turn on a Debug constant flag and then read the flow of my program in and out of methods

20:09 <[spoiler]> Just curious, I doubt I'd ever need it though

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20:09 <apeiros> [spoiler]: read the backlog

20:09 <onewheelskyward> Once I learned about visual debuggers, I've never gone back.

20:09 * [spoiler] reads

20:09 <apeiros> I said *within* was not possible. but that's not what he wants.

20:09 <[spoiler]> oh

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20:10 <apeiros> and "not possible" is actually just a lame hand waving for "very hard"

20:10 <apeiros> you could use tools like ruby2ruby or similar

20:10 <apeiros> but it's ugly, error-prone and nothing I'd recommend.

20:11 <[spoiler]> "<apeiros> if it's at the start or the end: yes. within the method: no" found it :P I missed it earlier

20:11 <yxhuvud> or open the files and load them again :D

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20:12 <apeiros> yxhuvud: he wants to add the code dynamically

20:12 <apeiros> i.e. generated code

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20:13 <Hanmac> apeiros: it seems i have some kind of "pauli-effect" on programs … when i poke them, they break ;P

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20:13 <apeiros> hanmac-pauli you shall be called henceforth

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20:13 <[spoiler]> hanmac, I think your pokes break out of the "poke" zone and become "probes" :P

20:14 <nhmood> So when #method_added for before method call and #method_removed for after it seems?

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20:14 <banisterfiend> hanmac can you speak to apeiros in german for a while

20:14 <nhmood> Besides not being the best way to debug (:p) are there any other downsides to this?

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20:16 <apeiros> nhmood: method_added is executed when you define a method. the idea is that you use that callback to redefine your method.

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20:16 <apeiros> i.e. you alias the method away and replace it with a new definition which does your debug print and then calls the alias

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20:18 <nhmood> I see

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20:19 <nhmood> It seems like it applies to a class instance

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20:20 <nhmood> aka. would I have to add the method for each class I create or would defining it under the Module carry down to all classes?

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20:20 <apeiros> yes. classes are instance of Class. hence an instance method of Class (and Module, which is Class' superclass) become "class methods"

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20:21 <apeiros> class methods are inherited. define it on Object and you'll get all (unless some descendant redefines it and doesn't call super)

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20:21 <apeiros> careful though, not that you create an infinite loop :) (adding within method_added will trigger method_added)

20:22 <nhmood> Ooo that is tricky

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20:22 <nhmood> Object --> Module --> Class is the correct heirarchy?

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20:23 <[spoiler]> nhmood, BasicObject

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20:24 <nhmood> I see, thanks

20:25 <[spoiler]> I meant to say that it's BasicObject - Object - Module - Class

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20:25 <[spoiler]> You can check by calling `super_class` on Class

20:25 <[spoiler]> wait

20:25 <[spoiler]> it might be superclass

20:25 <[spoiler]> actually... superclass looks more familiar

20:26 <nhmood> Yes, it is superclass

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20:26 <nhmood> I figured the BasicObject --> Object... part haha

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20:26 <Hanmac> [spoiler] & nhmood http://ruby-doc.org/core-2.0/Class.html there is a diagram for thar

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20:33 <havenwood> the '+' is a swordsman and the '^' is a bat, so be careful as you navigate the castle

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20:34 <havenwood> ruby object model roguelike

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20:34 <Hanmac> "ruby hierarchy - now a dungeon crawler"

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20:36 <nhmood> lol thanks hanmac

20:36 <[spoiler]> havenwood, hanmac lol

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20:39 <flyinprogramer> rabl question: http://pastebin.com/BRE3WMty

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20:41 <boycey> hi. need to change d/l server for rvm. any ideas ? getting just 40kbs atm

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20:45 <havenwood> flyinprogramer: https://gist.github.com/havenwood/11784b17ba992e1c718f

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20:46 <havenwood> boycey: Not sure, maybe try #rvm

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20:47 <havenwood> boycey: oh, nvm - see you're already there

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20:47 <havenwood> tsk tsk S3

20:47 <havenwood> the invincible cloud...

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20:48 <boycey> invincible? sure … https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=newssearch&cd=1&ved=0CC4QqQIoADAA&url=http%3A%2F%2Fwww.theregister.co.uk%2F2013%2F09%2F13%2Famazon_cloud_problem_north_virginia%2F&ei=fm9UUrTkO-aW0AWIzoGAAg&usg=AFQjCNEo3ZmkCtxxvVjxCK2mnjztXp6WLA&sig2=2vwMkGx7YCHiKtEW00w-WA&bvm=bv.53537100,d.d2k

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20:56 <pangur> Why does ... arr = IO.read("base.csv", "r", "\t") ... give me an error that says: roll.rb:9:in `read': no implicit conversion from string (TypeError) from roll.rb:9:in `<main>'? I take it that it is to do with the first element of each csv record being an integer? How do I get it solve this, please?

20:57 <pangur> It is a tab-separated file rather than a comma separated one.

20:57 <apeiros> pangur: what should the 3rd argument "\t" do?

20:58 <pangur> I was expecting it to indicate that the delimiter was a tab rather than a comma

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20:58 <[spoiler]> Isn't IO#read name, length, offset?

20:58 <apeiros> pangur: you're aware that you're using *IO* read?

20:58 <apeiros> IO has absolutely no concept of CSV

20:58 <[spoiler]> pangur: http://ruby-doc.org/core-2.0.0/IO.html#method-c-read

20:59 <pangur> Can I dispense with the IO then?

20:59 <apeiros> ?

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20:59 <pangur> I am taking that I do not need the IO part of IO.read

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21:00 <[spoiler]> Well, the big problem here is that I don't think #read does what you think it does.

21:00 <apeiros> oh… I think you'll have to learn a bit about how OO works.

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21:00 <apeiros> pangur: any class can have a read method. and no, you can't just "do away with IO and just use 'read'"

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21:01 <apeiros> if you want to read CSV files and don't want to parse yourself, you'll have to use a class which deals with CSVs. IO does not.

21:01 <pangur> I basically just want to open a file of lines, read each one, split it into "fields" and play about with that.

21:01 <apeiros> ruby stdlib includes the CSV class.

21:01 <[spoiler]> IO.read("blah.cvs", <how many btyes to read>, <offset>) #=> String

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21:01 <apeiros> also, how the heck did you get the idea to "just try and use 3rd param of read as separator"?

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21:02 <apeiros> programming doesn't work by wishing really hard that a method does what you want from it…

21:02 <shevy> hmm

21:02 <shevy> what!

21:02 <shevy> lies!

21:02 <shevy> LIEEES!!!

21:02 <[spoiler]> apeiros, keyword: try haha

21:02 * apeiros gives shevy a cake

21:03 <shevy> .cvs, didn't someone write a replacement for that... :D

21:03 * pangur was trying to import some of the idioms from other scripting languages of which he is vaguely aware.

21:03 <shevy> bad [spoiler] baaaad

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21:03 <shevy> I can't remember the name...

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21:04 <pangur> It seemed to me that I had seen "\t" begin used as a delimiter in one of the forums, somewhere.

21:04 <[spoiler]> shevy, Pfft. My typos are like unicorns

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21:04 <shevy> pangur File.readlines is too simple?

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21:04 <pangur> I would not have thought so, shevy :)

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21:04 <shevy> well dunno...

21:04 * pangur is very rusty on ruby

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21:04 <shevy> I always dread running .gsub on it leading to incompatible encoding stuff

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21:05 <[spoiler]> pangur, take a look at this: http://ruby-doc.org/stdlib-1.9.2/libdoc/csv/rdoc/CSV.html

21:05 <pangur> I have installed my ruby using rvm

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21:05 <BraddPitt> is there a way to programmatically get a ruby method definition?

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21:06 <[spoiler]> BraddPitt, use the #method :name method

21:06 * pangur is looking at [spoiler]'s link.

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21:06 <BraddPitt> no like

21:06 <BraddPitt> uh

21:06 <BraddPitt> the documentation

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21:06 <apeiros> BraddPitt: no

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21:06 <apeiros> BraddPitt: pry provides means

21:06 <BraddPitt> damn

21:07 <apeiros> `? Time.now` <- docs

21:07 <apeiros> `$ Time.now` <- code

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21:07 <apeiros> core methods require an additional gem, though

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21:07 <shevy> BraddPitt try __method__ inside a method perhaps?

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21:07 <BraddPitt> i just meant like in a REPL

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21:07 <apeiros> pry is a repl

21:08 <shevy> hmm the language Io had cool introspection, you could get the content and I think definition for any method at runtime whenever you wanted

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21:08 <shevy> BraddPitt show_method perhaps?

21:08 <apeiros> shevy: JS too. Function has toString

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21:08 <shevy> damn

21:08 <shevy> I want to continue hating JS

21:08 <[spoiler]> shevy, you can get the "content" (code) of a function in Javascript, too

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21:08 <shevy> :(

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21:11 <[spoiler]> shevy, you could do something like `new Function(<arguments, if any>, "bleh(); return;")`

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21:11 <shevy> hmm

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21:11 <shevy> why is the Function part upcased?

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21:11 <[spoiler]> it's the same as doing `function() { bleh(<arguments, if any>); return; }`

21:11 <shevy> hmm

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21:12 <[spoiler]> Because "Function" is a, well... function

21:12 <[spoiler]> it's like a class, i suppose

21:12 <[spoiler]> except JS has no classes

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21:13 <[spoiler]> i mean

21:13 <shevy> I find JS confusing

21:13 <shevy> although Io language also is prototypic

21:13 <[spoiler]> You can't really use lowerface cunction because "function" is a keyword

21:13 <shevy> ruby is like the most prototypic class-based language out there

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21:14 <shevy> ok, I can't use downcased function

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21:14 <shevy> but the new Function part still confuses me...

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21:14 <[spoiler]> it's like

21:14 <[spoiler]> Function.new

21:14 <[spoiler]> in ruby

21:15 <[spoiler]> like, ruby has a class keyword and a Class class

21:15 <shevy> ok, that is just class Function; end yes?

21:15 <shevy> or is it more like Function = method(name_here)

21:16 <[spoiler]> Uh

21:16 <[spoiler]> It's like doing

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21:16 <[spoiler]> ok hold on

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21:17 * shevy holds on

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21:19 * shevy wonders if [spoiler] is still alive ...

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21:19 <[spoiler]> he is :D

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21:20 <nobitanobi> Anybody familiar with Nokogiri? I am trying to find all images that are children of an anchor which href value is equal to 'a', 'b' or 'c'. So far I have done this: https://gist.github.com/novito/6891911 -- but I fail to see how to get the images. Any thoughts? Thanks

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21:21 <[spoiler]> shevy, https://gist.github.com/omninonsense/82a0ec81058a07acdcab

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21:21 <[spoiler]> Well, the ruby equivalent of example 2 would be a proc/block

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21:22 <[spoiler]> but I didn't use it so you get an idea of how JS works, I know you know ruby

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21:22 <shevy> [spoiler] interesting

21:23 <shevy> does this mean that javascript has a feature that ruby does not have?

21:23 <[spoiler]> nobitanobi, erm, did you try using attribute selectors inside css?

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21:23 <shevy> [spoiler] I know only some ruby, not 100%... lots of the meta-stuff is rather complicated so I avoid it when I can

21:23 <[spoiler]> shevy, Ruby has it, it just implements it differently

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21:24 <nobitanobi> uhm? [spoiler] I am able to get the anchors that satisfies href = a, b or c. But after that, I don't know how to get the images inside each of those anchors

21:24 <[spoiler]> nobitanobi, is it an img element?

21:24 <nobitanobi> yes

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21:24 <nobitanobi> I know I can do. anchor_element.children

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21:25 <nobitanobi> but I just want the <img> elements

21:25 <nobitanobi> particularly, the src attribute of the img elements

21:25 <nobitanobi> :)

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21:25 <[spoiler]> how about

21:26 <[spoiler]> you call css on the anchor inside the block?

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21:26 <nobitanobi> uh

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21:26 <nobitanobi> what do you mean? as a condition?

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21:26 <nobitanobi> oh ok. I know what you mean

21:27 <[spoiler]> something like https://gist.github.com/omninonsense/6892009 (not sure what elements are inside anchors, but I think it should be nokogiri compatible)

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21:27 <nobitanobi> Oh interesting. I can call css on any nokogiri element

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21:27 <nobitanobi> Yeah [spoiler] exactly thanks

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21:28 <[spoiler]> nobitanobi, probably. I'm not 100% sure, but I think it should work

21:28 <nobitanobi> do you think it would make sense to do all this in just one line?

21:28 <[spoiler]> nobitanobi, yeah, I think it can be truncated

21:28 <nobitanobi> I mean, finding all anchors that satisfy href = 'a', 'b' or 'c' and get the images?

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21:28 <nobitanobi> I think is cleaner in two steps...

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21:28 <nobitanobi> uh

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21:30 <[spoiler]> Also, I think this should work:

21:30 <[spoiler]> anchors = page.css('a[href]').select { |anchor| roots.include? anchor['href'] }.

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21:30 <[spoiler]> shevy, JavaScript is pretty cool. If you want to "transition" into JS from Ruby, you can try CoffeeScript! I still think Ruby is a nicer than JS, but I also love JS

21:31 <nobitanobi> uh, interesting. I thought that by doing that, you would just select href, not the anchor itself

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21:31 <[spoiler]> Nope. It's an attribute-selector. It selects all elements that have that attribute

21:31 <[spoiler]> you could even do [href]

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21:31 <[spoiler]> but there's no point, I guess

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21:32 <nobitanobi> [spoiler], thanks.

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21:32 <[spoiler]> nobitanobi, if you wanna read more about attribute selectors: http://www.w3.org/TR/CSS2/selector.html#attribute-selectors

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21:32 <nobitanobi> [spoiler], thanks I will read that.

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21:33 <[spoiler]> nobitanobi, also don't forget that they can used to target *any* attribute (even data-* attributes)

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21:34 <nobitanobi> [spoiler], you know, when doing this "anchor.css('img').attr('src')" I get "undefined method `attribute' for nil:NilClass"

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21:34 <nobitanobi> [spoiler], ok. I am guessing I might need to look at xpath too, for more complex operations

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21:34 <[spoiler]> nobitanobi, Hmm. Are you sure there's an img tage inside the anchor?

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21:35 <nobitanobi> nop, not always.

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21:35 <nobitanobi> right, I might need to make sure first..

21:35 <nobitanobi> anchor.css('img').attribute('src') if anchor.attibute('img')

21:35 <nobitanobi> oh shut

21:35 <nobitanobi> no sorry. I would need to make sure that anchor.children contains img.

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21:38 <[spoiler]> I'm not sure if the anchor is even a nokogiri object. Try debugging it to see

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21:39 <nobitanobi> yup, it is : Nokogiri::XML::Element

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21:40 <[spoiler]> nobitanobi, Great! Also, I don't remember if #css returns an element or an array?

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21:41 <nobitanobi> array

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21:42 <[spoiler]> anchor.css('img').attribute('src') wouldn't work, then

21:42 <apeiros> d'oh

21:42 <nobitanobi> I'm doing soomething like this: if images = anchor.css('img') images.each do |image| srcs << image.attribute('src')

21:42 <apeiros> I think I got my wife addicted to the pc game 'fez'

21:42 <[spoiler]> Oh, okay then

21:43 <[spoiler]> apeiros, is that the rabbit game?

21:43 <nobitanobi> [spoiler], thanks

21:43 <apeiros> [spoiler]: it's the retro game where you start 2d and later learn how to "rotate" the worldview

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21:43 <apeiros> nobitanobi: `images.each do |image| srcs << image.attribute('src')` --> `srcs = images.map { |image| image.attribute('src') }` please

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21:43 <bnagy> rrr fez

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21:44 <[spoiler]> Oh! I know that game! I played it hahahaha

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21:44 <apeiros> she accidentally played from my save-point (played through) and found a full cube I missed :-S

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21:44 <[spoiler]> Damn, she's got you! :P

21:44 <apeiros> yeah

21:44 <bnagy> there is one bit where I am stuck because it requires non-retarded jumping on things skills

21:44 <apeiros> lava?

21:45 <bnagy> yeah

21:45 <[spoiler]> retarded jumping is how I play Guild Wars 2

21:45 <apeiros> :)

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21:45 <apeiros> yeah, the lava bit was where she asked me to help her

21:45 <apeiros> jumping isn't her thing either

21:45 <bnagy> I have like 58 cubes or something :<

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21:46 <platzhirsch> [1..5].include?(3) => false, literate programming? You are doing it wrong

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21:48 <[spoiler]> platzhirsch, that's an array with 1 element haha

21:48 <platzhirsch> [spoiler]: ^^

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21:48 <[spoiler]> At first I didn't understand what was wrong, and then I noticed the brackets

21:49 <platzhirsch> yeah, I was going for something like this [1..40, 41..90,91..100]

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21:49 <Hanmac> >>[*1..5]

21:49 <eval-in_> Hanmac => [1, 2, 3, 4, 5] (https://eval.in/53257)

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21:51 <Hanmac> >> [*1..40,*41..90,*91..100] == [1..40,41..90,91..100].flat_map(&:to_a)

21:51 <eval-in_> Hanmac => true (https://eval.in/53258)

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21:53 <Hanmac> platzhirsch: see thats how you can make it with your sample

21:53 <platzhirsch> hanmac: yeah :)

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21:54 <apeiros> bnagy: oh wow, I have probably some 40-50.

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21:58 <Hanmac> havenwood: look what old rubinius1.2 do with my newest founding: https://eval.in/private/7e56c6b1c83ff7

21:59 <shevy> man

21:59 <shevy> are you crashing things again

21:59 <shevy> no wonder you dont finish your GUI bindings!

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22:07 <bnagy> apeiros: once you decode the alphabet and start second playthrough lots of them are just grunt work

22:08 <bnagy> but then I got distracted by coding Go

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22:09 <[spoiler]> hanmac, isn't that a normal error, considering Object is a not a valid object type for a range? o:

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22:09 <[spoiler]> `bad value for range (ArgumentError)`

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22:10 <Hanmac> [spoiler]: hm yeah but i manage to get pass this error, and then it raise an StackError (imo it should not)

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22:11 <[spoiler]> hanmac, oh, I thuoght you're still messing with the segfault bug

22:11 <Hanmac> [spoiler]: the problem: Range only checks if < method or something exist, it does not check if the <=> is possible missing

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22:12 <Hanmac> [spoiler]: imo its a bit of combined (it should neigher segfault and not StackError)

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22:12 <pangur> Thanks, apeiros and [spoiler]. Got it all working now. Thanks again.

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22:14 <[spoiler]> hanmac, You don't resuce an Argument error. You rescue SystemStackError 3 times

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22:14 <[spoiler]> or maybe my dyslexia is kicking in and I'm not reading this properly

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22:15 <[spoiler]> pangur, yw :)

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22:16 <Hanmac> [spoiler]: like i said … the code inside should not raise an StackError (i only catch them to show when the Segfault appears)

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22:16 <Hanmac> i mean currently it does raise an StackError but imo that is wrong, thats why i make a ticket

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22:17 <[spoiler]> hanmac, o.o I thought it's raising an ArgumentError, I don't see a StackError. Damnit, I am confused!

22:18 <Hanmac> haha, just try it on jruby … because jruby cant rescue StackErrors ;D

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22:20 <[spoiler]> If I run the code & remove all the `SystemStackError`s, then it works fine. So, rbx is not raising a stack error? Also, i tried changing it to ArgumentError and there was no stack error

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22:20 <Hanmac> rbx seems to work, but the others make dump

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22:21 <[spoiler]> Ooooh, ok let me test the other ones

22:21 <[spoiler]> Oh yeah it takes a shit

22:21 <Hanmac> [spoiler]: i already tested some https://bugs.ruby-lang.org/issues/9003

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22:23 <[spoiler]> hanmac, Oh okay. I get it now.

22:23 * [spoiler] slaps his forehead

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22:24 * Hanmac - finding Segfaults since '88 ;P

22:24 <[spoiler]> Haha

22:24 <platzhirsch> Having a positive integer, how do I map it into one of three categories using ranges? Any idea how to make this as a one liner?

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22:25 <platzhirsch> { range => categoriy, ... }

22:25 <[spoiler]> platzhirsch, You have 3 ranges and want to see if it fits?

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22:26 <platzhirsch> [spoiler]: Yes, like so: { 0..20 => 'a', 21..80 => 'b', 81..100 => 'c' }[5] => 'a'

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22:27 <platzhirsch> I could add an array with the same ranges and pick it with select and include? ^^

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22:27 <Hanmac> platzhirsch:

22:27 <Hanmac> >> {1..3 => "A", 4..6 => "B"}.find{|r,_| r === 5}.last

22:27 <eval-in_> Hanmac => "B" (https://eval.in/53273)

22:27 <crus> why does my irb prompt change from >> to ?> if i type ; ? what does ?> mean?

22:27 <platzhirsch> case equality, nice one

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22:28 <platzhirsch> crus: parsing, it displays the staet of the parser, it is expecting something which closes the state again

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22:28 <crus> platzhirsch: how can i close the state?

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22:30 <platzhirsch> crus: if you enter something that is syntactical correct it should not happen in the first place, but maybe I get this wrong

22:30 <crus> platzhirsch: okay yes, it happens if i just presss enter without entering anything too.. typing something syntactically correct gives me the >> prompt - thanks.

22:31 <platzhirsch> ah I see what you mean, I don't get the question mark, but everthing is indented

22:31 <platzhirsch> err the semicolo

22:31 <[spoiler]> Okay, I'm off to bed

22:31 <[spoiler]> see ya!

22:31 <platzhirsch> [spoiler]: good fight

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23:03 <Deele> hey, is it possible to make a fully standalone ruby app with gems and other libraries?

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23:12 <shevy> what is "fully standalone"

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23:13 <shevy> it seems to imply that it depends on something

23:13 <shevy> basically, the target computer needs to have a working version of ruby. once that is the case, you could wrap everything into a gem and add that to that "app"

23:13 <Deele> like allinoneruby which allows to carry around ruby code and run on any os

23:14 <shevy> you mean http://www.erikveen.dds.nl/allinoneruby/ ?

23:14 <Deele> http://rubyforge.org/projects/allinoneruby/

23:14 <shevy> well it has not been maintained in 6 years :\

23:14 <Deele> oh, I see

23:15 <Deele> didn't notice

23:15 <froy> ruby code can already run on any OS

23:15 <Deele> yeah, but afaik, it should be installed, and gem package manager should be installed

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23:15 <froy> yeah. why is that a problem? so install it.

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23:16 <froy> are you trying to bundle the ruby vm with an application or something?

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23:16 <Deele> I guess so

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23:17 <Deele> I think, I'm asking too complex questions, before even being fully capable of coding in ruby

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23:18 <froy> if you want to distribute your application with an install of ruby, you'll have to have different distributions which are made for different platforms.

23:18 <froy> on the other hand, it's not hard to ask them to install ruby.

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23:19 <froy> and even then, most unix operating systems come with ruby.

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23:19 <Deele> I'm thinking about creating a gui app with shoes

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23:20 <Deele> and before that, thinking how will look installation of that app on brand new Win and *nix computer

23:20 <froy> this isn't any different from distributing an app for java.

23:20 <froy> if you need to run a java app, you have to install the vm.

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23:23 <volty> bandle, package -> click & go

23:23 <volty> there are people that have to deploy their apps with least messing on the client side

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23:24 <volty> so the answer is (if froy is right): no, ruby does not have that yet // and the answer cannot be ' shouldn't be difficult etc etc '

23:24 <volty> sorry

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23:26 <volty> java comes in one click

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23:28 <Deele> ok

23:28 <volty> my ho is that some people should stop thinking that everybody can play, like us, installing ruby's, gem's, rvm's etc etc

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23:28 <Deele> you mean?

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23:28 <volty> Deele: i was at froy

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23:29 <volty> sometimes here people ask simple questions but receive hackerish answers

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23:35 <BrightNewFuture> Deele, try stackoverflow.com.

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23:35 <Deele> what should I try exactly?

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23:35 <BrightNewFuture> Specifically, try asking that question on stackoverflow.com Deele.

23:36 <volty> anybody knows how to send a text to a terminal ?

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23:36 <Deele> I'm asking here, as I'm not really sure, what is my question

23:36 <Deele> or should I really need answer :)

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23:37 <Deele> I need to write a working program and only then think about deploying it

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23:37 <volty> http://www.google.com/search?q=ruby+how+to+create+a+bundle+with+all+gems+needed&ie=UTF-8&oe=UTF-8

23:37 <volty> ah, ok :) write it and come back later

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23:38 <jlundy> hey guys, silly question

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23:38 <jlundy> can you use rescue on a single line?

23:38 <jlundy> without begin that is

23:38 <Deele> volty thx, now I know what is my question

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23:38 <jlundy> such as something like "1/0 rescue 0" (if you wanted to do something crazy)

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23:40 <bnagy> jlundy: you should check our irb or pry

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23:40 <bnagy> then you can try these things yourself easily

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23:40 <bnagy> >> 1/0 rescue 0

23:40 <eval-in_> bnagy => 0 (https://eval.in/53281)

23:41 <volty> jlundy: you cannot since ruby has to know what to guard for rescuing

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23:41 <jlundy> ah weird that it doesnt complain

23:42 <bnagy> it doesn't complain because it's valid

23:42 <bnagy> volty is just being wrong as usual

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23:42 <bnagy> and now we'll have some epic discussion about how it's all context blah blah blah

23:42 <volty> yes dear -- as always :)

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23:42 <jlundy> if (@selenium.find_element(:css, '.save-cancel .message') rescue false)

23:42 <volty> you have to grow yet -- out of your context :)

23:42 <jlundy> is what Im trying to do essentially

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23:43 <jlundy> if selenium throws the exception because the element doesnt exist

23:43 <jlundy> I wanted to rescue and set the conditional to false

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23:43 <jlundy> so that the rest of the logic will run

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23:43 <bnagy> jlundy: yeah it works, I'd probably use nil, but same same

23:43 <jlundy> ah. seems to not work for me is why I was curious

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23:43 <bnagy> if there's more than one thing that could be wrong in find_element then you should handle it 'properly'

23:44 <jlundy> sure, its either there or not

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23:45 <bnagy> >> if (raise rescue true); puts "lol"; end

23:45 <eval-in_> bnagy => lol ... (https://eval.in/53286)

23:45 <bnagy> the syntax is valid, if it's not working then something else is wrong

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23:46 <jlundy> yeah on me probably

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23:46 <jlundy> thanks

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23:47 <bnagy> np ( but test in irb next time ;)

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23:50 <riceandbeans> I can't remember who I was talking to earlier but someone told me how to make a variable with a variable name

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23:50 <volty> you are so good, notionful in ruby, i like you when you assist the people in this way :)

23:51 <riceandbeans> ie, array contains names of the variables, which in turn are object references to names of objects, defined by attr_accessors within themselves for unique values

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23:54 <volty> riceandbeans: iterate and eval

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