#ruby on 2012-02-01 — irc logs at freenode.irclog.whitequark.org

2011-11-28 00:09 Topic for #ruby is now Ruby programming language || ruby-lang.org || RUBY SUMMER OF CODE! rubysoc.org/ || Paste >3 lines of text in http://pastie.org || Para a nossa audiencia em portugues http://ruby-br.org/

00:00 newbold [newbold!~adam@74-134-27-218.dhcp.insightbb.com] has joined #ruby

00:00 <newbold> does "uninitialized constant Net::IMAP" mean that I need to download or install something for the IMAP functions?

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00:02 <newbold> oh, duh, neverminsd

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00:03 <regedarek> Hi, anybody here?? how to setup in sinatra LOAD_PATH becose when i have require 'filename' and filename in the same directory i recieve no such file to load

00:03 <deryldoucette> require_relative not require if its in the same dir

00:05 <regedarek> ok and this is consistent with convention?

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00:13 <richo> not all rubies have require_relative tho

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00:33 <regedarek> ok thx

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00:40 <regedarek> and another question how shuld i setup root path in config.ru becose in production(heroku) i get require_relative 'hkshop'

00:40 <regedarek> sory

00:40 <regedarek> 2012-02-01T00:38:35+00:00 app[web.1]: config.ru:5:in `require_relative': cannot infer basepath (LoadError)

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00:59 <waxjar> i set up a Procfile that does bundle exec ruby -I ./ app.rb, maybe that'll work for you regedarek

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01:38 <codefriar> so, this is probably a stupid question, but are there any known issues with itteratting over an array knowing that the block executed will most likely add to the array ?

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01:43 <savage-> codefriar: yes, that's not safe and can mess up the ordering

01:44 <codefriar> savage-: what if I don't care about the ordering ?

01:44 <codefriar> I could use a set

01:44 <codefriar> er

01:44 <codefriar> an array

01:44 <savage-> codefriar: do not modify the data structure while iterating

01:44 <banister`sleep> codefriar: y not just iterate over a dup

01:44 <savage-> codefriar: you could iterate over a dup

01:44 <savage-> banister`sleep: i still owe you a stack explorer!

01:44 <codefriar> I tried doing it with dispatch (macruby) with queues and jobs but it segfaults

01:45 <banister`sleep> savage-: just when you're ready

01:45 <savage-> you bet!

01:45 <savage-> good night guys! smell ya later.

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01:58 <Jarred> Hi all

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02:05 * mythmon waves

02:05 <Jarred> I have a state machine. The state machine itself is very simplistic. But, the mechanism that defines what to switch to, and when isn't. Every couple minutes it gets new data that could result in it needing to change state. It could be getting this data at any time, and should perform at least one action on it always. I need something to manage the state. The thing is, I don't know that much about state machines, or design patterns. Is

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02:43 <jesseangell> I can't for the life of me figure out why gem install ffi works fine..but bundle install rvm blows up with extconf.rb errors. using rvm ..ruby 1.9.3 in a gem set.. any ideas? http://pastebin.com/W1uXmxXX

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02:56 <wallerdev> jesseangell did you look at the log file?

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02:57 <jesseangell> wallerdev: all it says is /var/lib/jenkins/.rvm/rubies/ruby-1.9.3-p0/bin/ruby extconf.rb which executes fine if I run it like that

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03:00 <regedarek> hi i have big problem with data format

03:00 <regedarek> = DateTime.parse(r.reserv_from)

03:00 <regedarek> = Date::strptime(r.reserv_from, "%m-%Y")

03:00 <regedarek> this always gives me error: undefined method `sub!' for 2011-02-21 00:00:00 +0100:Time

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03:06 <shevy> regedarek perhaps because .sub does not work on Time object

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04:01 <shevy> Anyone familiar with FFI? I just started to dive into it. Hello world example: http://pastie.org/3293406 I am wondering if it is possible to use default arguments to functions such as #puts though

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04:07 <banisterfiend> shevy: just FFXII i played on ps3 a few years ago

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04:08 <banisterfiend> shevy: isn't FFI a text adventure

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04:19 <shevy> hmmm for now I'll assume that it is not possible to use default arguments in FFI

04:19 <shevy> attach(mod, name)

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04:24 <banisterfiend> shevy: join #pry

04:24 <banisterfiend> shevy: i'll give u ops

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04:25 <Banistergalaxy> Shevy....

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04:26 <shevy> one thing after the other!

04:26 <shevy> I am now on the new ruby-gnome

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04:26 <shevy> stupid gtksourceview2 ...

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04:30 <redgetan> is there a way to get the string in the current line of STDOUT?

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04:35 <Animawish> what does this error mean?

04:35 <Animawish> in `index': type mismatch: NilClass given (TypeError)

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04:36 <shevy> Animawish the argument is probably nil

04:36 <shevy> to .index

04:36 <shevy> check it

04:37 <shevy> or perhaps the object on which #index is called

04:37 <shevy> one of these two :)

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04:49 <Animawish> is there an opposite for .include?

04:50 <Animawish> .exclude?

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04:54 <rippa> Animawish: !foo.include?

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04:58 <Animawish> well it's an array

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05:01 <Animawish> I've got

05:01 <Animawish> array.include? item

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05:07 <shevy> Animawish .reject

05:07 <shevy> though

05:07 <shevy> that would give you only the non included ones

05:08 <shevy> puts 'Yup is not included' unless %w( abc def ghi ).include? 'abc' # => nil

05:08 <shevy> and no output!

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05:48 <jesseangell> I'm having a hell of a time with segmentation faults using ruby 1.9.3-p0 on Ubuntu. Happens about 50% of the time when I run rspec

05:48 <jesseangell> Anyone have a clue? Been chasing this for hours..

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05:51 <shevy> No idea. I am still on 1.8.7. 1.9.x is annoying me way too much in general

05:51 <banisterfiend> jesseangell: give a backtrace

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05:52 <jesseangell> banisterfiend: https://gist.github.com/36db0e9e0bf972c34c36

05:52 <jesseangell> banisterfiend: happens about 50% of the time I run rspec in the exact same way

05:56 <banisterfiend> jesseangell: look at this line: /var/lib/jenkins/.rvm/gems/ruby-1.9.3-p0/gems/yard-0.7.5/lib/yard.rb:46

05:57 <jesseangell> banisterfiend: require file seems to have nothing to do with yard though. if i get yard out of the picture then it blows up on back ports.rb line 5 or something

05:57 <jesseangell> about 50% of the time for that too

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05:57 <banisterfiend> jesseangell: weird, sounds like your 1.9.3 build is broken

05:58 <banisterfiend> jesseangell: try reinstalling it

05:58 <jesseangell> banisterfiend: I keep rebuilding it every which way I can think of .. and it does that

05:58 <jesseangell> i've tried gcc 4.4….gcc 4.3..etc

05:58 <banisterfiend> jesseangell: stick to 1.9.2 then ;)

05:58 <banisterfiend> hehe

05:58 <banisterfiend> sorry i cant be of more help

05:58 <banisterfiend> jesseangell: try asking on the ruby-forum

05:58 <banisterfiend> core members hang there

05:58 <banisterfiend> and probalby have an answer for oyu

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06:19 <shevy> rvm ... builder ... segfaults

06:19 <shevy> It all scares me

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06:25 <jesseangell> shevy: tell me about it. been fighting this for …well way too long

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06:25 <jesseangell> and every time I think I fixed it

06:25 <jesseangell> i realize the problem is deeper and worse

06:25 <shevy> hehe

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06:58 <regedarek> Hi

06:58 <regedarek> me again :)

06:58 <regedarek> how to save parametr with association

06:59 <regedarek> item = Item.find_by_name(params[:name])

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06:59 <regedarek> item.reservations.last.status = 2 | item.save

06:59 <regedarek> how to save this record in Reservation model

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07:09 <jesseangell> shevy: doesn't seem to be a problem on 1.92.

07:09 <jesseangell> shevy: must be something funky about 1.9.3

07:15 <shevy> jesseangell yeah that's the evolution of ruby in the 1.9.x branch. from suck to more suck.

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07:18 <skim1776> hello there

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07:19 <skim1776> is it normal to have many require_relative imports in the ruby project? is it possible to replace them with some simple construction?

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07:20 <banisterfiend> skim1776: you probably shouldnt have too many in a single file

07:21 <banisterfiend> that likely demonstrates you havent modularized your code very well

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07:21 <skim1776> 3 is too many? I saw some constructions with __FILE__ which can replace it

07:23 <banisterfiend> skim1776: 3 is ok

07:23 <skim1776> banisterfiend, ok, thanks

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07:35 <senthil> Is there any library that can find prepositions/verbs etc. in a given sentence/paragraph. I found several natural language parsers, but none find prepositions.

07:40 <L|NUX> can someone tell me how can i parse 2012-02-01T01:35:45-0600 to 01/Feb/2012:01:35:45 -0600 this ?

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07:45 <L|NUX> any one ?

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07:49 <moshef> how do i reject/delete some items from array? for example array[0..2] . is it possible?

07:50 <L|NUX> http://pastie.org/private/9t2ehjjbibkhxi8t5ayffq

07:50 <L|NUX> can someone please look into this

07:50 <a_a_g> moshef: yes

07:51 <moshef> a_a_g: ...

07:51 <a_a_g> negative indices also work - array[0..-1]

07:51 <moshef> enlighten me plesae

07:51 <a_a_g> you want to pick out sections of arrays right? based on start and end index?

07:52 <moshef> yeah

07:52 <moshef> lets say i want to remove the first 2 objects in array. array[0] and array[1]

07:52 <moshef> and will you do it ?

07:53 <a_a_g> arr[0..1] will create a new array of the 2 elements

07:54 <moshef> but it will not be removed from the first array

07:54 <moshef> from the original one i mean

07:54 <a_a_g> http://ruby-doc.org/core-1.9.3/Array.html#method-i-slice-21

07:54 <a_a_g> thats what you want

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07:56 <moshef> a_a_g: true, thanks

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07:57 <regedarek> hi, how to sahi, how to format 2012-02-22 00:00:00 +0100 to only date??

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08:00 <rippa> require 'date'; Date.parse '2012-02-22 00:00:00 +0100'

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08:00 <L|NUX> rippa: hmm

08:00 <L|NUX> ok

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08:02 <sgronblo> Is there a good reason that raise deals with Exception classes instead of instances?

08:02 <sgronblo> What if your Exception has some non-standard constructor...

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08:10 <sgronblo> Is it just that the docs for Exception are a bit dumb and old?

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08:10 <sgronblo> raise seems to work just fine with Exception instances too

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08:13 <banisterfiend> sgronblo: read 'exceptional ruby' book

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08:32 <skim1776> in the lib file I have project_name.rb file and project_name folder, and 3 files which include only one module per file, I include them as require_relative "project_name/file_name"

08:33 <skim1776> but when I use module method such as ModuleName::module_method it raises error uninitialized constant ProjectName::ModuleName

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09:43 <banisterfiend> JonnieCache: ping

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09:51 <skim1776> why doesn't "rake test" produce any output if there are tests?

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09:53 <moshef> is there a quick way to rotate over array and remove "duplicate" entries?

09:53 <rippa> Array#uniq

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09:54 <Tasser> skim1776, depends on what rake test does

09:55 <moshef> rippa: thanks

09:55 <skim1776> Tasser, it produced the result, number of assertions and other, but I've changed some code(not in the test files but in source) and nothing is produced

09:55 <moshef> rippa: i'd like to remove the first one, not the last

09:56 <moshef> is it possible?

09:56 <rippa> reverse array

09:56 <moshef> yeah was about to ask if i should do that :)

09:56 <moshef> thanks

09:57 <Tasser> skim1776, bisect the changes

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10:43 <tshirtman> hi there, i'm a bit new to ruby, and i'm wondering why "yield {:key => value, :key2 => value2} doesn't work, but whey i do yield some_method_that_return_an_hash, everything is ok

10:45 <tshirtman> i google around but i didn't find anyone asking about this, so no answer :]

10:46 <tshirtman> (the method just do "return {:key => value, :key2 => value2}" so the yield should be able to do the same thing, right?

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10:47 <rippa> yield({:key => value, :key2 => value2})

10:47 <tshirtman> ooooh

10:49 <tshirtman> thanks, it works, now, why? {} should be enough to isolate it right?

10:50 <rippa> {} is also block syntax

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10:51 <tshirtman> ok thanks

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10:55 <shevy> yeah that confuses people

10:56 <shevy> hash and block syntax can be the same

10:56 <shevy> but it can be different too ... Hash.new vs. do/end

10:56 <shevy> tshirtman do you wear tshirts

10:56 <tshirtman> i only knew about do/end yet

10:56 <tshirtman> yep :)

10:56 <tshirtman> all day of the year :)

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10:57 <shevy> what I like about {} block is that to me it is visually more appealing to group a block that way, than use do/end

10:58 <tshirtman> i was about to ask why two syntax for the same thing, especially if it makes some corner case awkward

10:59 <tshirtman> but yeah, i understand it can be nicer in some situations, i'm more of a "one way to do it" guy though (but i have to do ruby now, so i learn it ;))

11:00 <tshirtman> and i don't intend to create any flamewar, i just whant to understand :)

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11:08 <shevy> not sure tshirtman, I think one constraint is that there is only a limited amount of syntax possible without introducing more and more keywords

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11:08 <shevy> like the addition of the ugly -> operator in ruby 1.9.x

11:08 <shevy> one way to do it is possible in ruby - just pick one, and ignore the others

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11:11 <tshirtman> yeah, of course, until you deal with other people code, that is ^^, but yeah, nothing that can't be solved with some project coding standard :)

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11:12 <shevy> I hate other people's code

11:12 <tshirtman> heh ^^ http://abstrusegoose.com/432

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11:19 <Ammar01> hi, is there a quick and easy way to construct a date {x} years ago from today's date in ruby?

11:19 <Mon_Ouie> Date.now - 365 * x

11:20 <Mon_Ouie> Well, doesn't really work, you have to take leap years in account

11:20 <Mon_Ouie> Or use another method to create the date

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11:21 <Ammar01> thanks Mon_Ouie - leap years was a concern I had too

11:21 <oddmunds> Ammar01: https://github.com/mojombo/chronic

11:22 <Ammar01> thanks oddmunds that looks very useful

11:23 <oddmunds> it looks like it should do EXACTLY what you're after :)

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11:23 <Mon_Ouie> I wouldn't use it for this problem though, as it doesn't involve parsing any human-written date

11:24 <Mon_Ouie> I would just use Date.new(Date.today - x, …)

11:24 <Mon_Ouie> today.year*

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11:29 <fanzeyi> Hello, I met a problem when i try to access DATA in unittest file(I used 'test/unit').. Error Msg: uninitialized constant DATA .. Are there any ways to access DATA in a test file?

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11:46 <Ammar01> Mon_Ouie that works great: x = Date.new(Date.today.year - 10). I can use x.leap? to check if it's a leap year but is there a way I can directly modify the year of that date object?

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12:03 <dagobah_> Is there a nice way to total up values in an .each{} ?

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12:04 <dagobah_> I don't want: total = 0 ; things.each { |thing| total += thing.size }; total;

12:04 <Mon_Ouie> Ammar01: No, date objects are immutable, you need to copy all the other attributes over

12:04 <dagobah_> What's the nicer way?

12:04 <Mon_Ouie> dagobah_: Use inject

12:04 <dagobah_> thanks

12:04 <Mon_Ouie> inject(0) { |sum, obj| sum + obj.size }

12:05 <Mon_Ouie> Ammar01: Also, don't forget what should happen when you try to get "three years from 29th February"

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12:53 <gyre007> does every iterator have to have a block assigned to it or is there any other use of it ?

12:54 <ccooke> no, iterators are objects

12:54 <ccooke> "iterator = array.each" works, for instance, and there are methods you can call on the iterator.

12:55 <gyre007> ccooke, ok cool...I'm just a newbie hence my stupid question

12:56 <gyre007> ccooke, what kind of objects are they ? Proc objects ?

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12:58 <ccooke> gyre007: Enumerator

12:59 <gyre007> ok

12:59 <gyre007> cheers

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13:12 <`brendan> morning ya'll

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14:06 <DerTyp> hello

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14:07 <DerTyp> can anyone tell me where I can find a more detailed error than that on the browser: Change this error message for exceptions thrown outside of an action (like in Dispatcher setups or broken Ruby code) in public/500.html

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14:36 <AxonetBE> I'm using ruby 1.9.3 and when I load the app he gives me [FATAL] failed to allocate memory

14:37 <AxonetBE> using it with rails 3.2.1

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14:41 <shevy> typical 1.9.x

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14:49 <shevy> I think we witness a negative evolution for a while, until things eventually reach a turning point and get better again

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14:52 <banisterfiend> shevy: watch this with me http://www.sockshare.com/file/0F59185170CD897A#

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14:53 <mw44118> just for fun, I have a question about ruby. Could I modify the assignment method on an object x, so that when somebody does y = x, instead of setting y to point to x, y points to something else? How would I do that?

14:54 <rippa> no

14:54 <rippa> you can't

14:54 <googya> hi,all, I met a problem when using apache2 and passenger

14:56 <JonnieCache> mw44118: you sort of could, you can write setter methods which lie about what they do

14:56 <mw44118> rippa: OK, but I could do y.foo = x, and define the assignment method for y.foo.

14:56 <JonnieCache> you cant do it with local variable assignment though

14:56 <rippa> mw44118: yes

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14:57 <mw44118> rippa: thanks

14:59 <Mon_Ouie> mw44118: You can't because there is no assignment method

14:59 <Mon_Ouie> C++'s operator= is more like Ruby's replace method

14:59 <Mon_Ouie> e.g. str = "foo"; str.replace "bar" # str is still the same object, with a different content

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15:07 <DerTyp> I get this error code in the browser: Change this error message for exceptions thrown outside of an action (like in Dispatcher setups or broken Ruby code) in public/500.html

15:08 <DerTyp> trying to run getontracks

15:09 <DerTyp> can anyone tell me where i can find a more detailed error message

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16:13 <asteve> header['content-type'] ||= ''; what is this statement doing?

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16:16 <waxjar> it's a tricky statement, but here's a good explanation: http://www.rubyinside.com/what-rubys-double-pipe-or-equals-really-does-5488.html

16:16 <waxjar> basically it assigns '' to header['content-type'] when header['content-type'] is nil

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16:20 <asteve> @var = instance variable, @@var = class variable, $var = global variable?

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16:20 <asteve> header[] is not an array but a hash?

16:22 <waxjar> yes

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16:52 <virtuoussin13> I have question. I'm looking at a module that uses self.extended to get some special behavior when a module is extended. Where is that method, and others like it, documented?

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16:53 <virtuoussin13> In particular, i'm trying to find a way to get a special handler to run whenever a new method is defined on an object

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16:55 <dl3r> exists a function to check whether a number existing in a string?

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16:57 <Seppman> of course, use string.match(/\d/) #! /\d/ - A digit character ([0-9])

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17:02 <glacius> outside of active record waht is the best way to access a sql server data from ruby

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17:03 <dl3r> i found a better solution Seppman, look :3 http://hadoop.apache.org/

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17:05 <Seppman> dl3r: Overkill for testing if Digit exists in a String :-)

17:05 <dl3r> Seppman: no, my code is better than yours, because it's faster :P

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17:06 <Seppman> we'll see next week

17:07 <virtuoussin13> I see this idiiom a lot, what exactly is this used for? class << self; self; end

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17:11 <ccooke> virtuoussin13: it accesses the metaclass of 'self' (also known as the eigenclass)

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17:11 <virtuoussin13> so, the class object of self?

17:11 <ccooke> no, not really

17:12 <ccooke> Everything in ruby is an object, and every object has a class

17:12 <ccooke> Every object, though, has an eigenclass. Imagine it as a parent class that's specific to that object alone

17:12 <virtuoussin13> ah

17:13 <ccooke> (there are better descriptions)

17:13 <virtuoussin13> so what does the << bit mean? I know that class < whatever means inheritance

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17:14 <blueadept> really dump question i know but how do i reference this provider value? http://pastie.org/private/t83dfdgumxrjpe9kxpjw

17:14 <blueadept> dumb*

17:14 <ccooke> virtuoussin13: that's used to access the metaclass

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17:15 <virtuoussin13> I see. So it's a way to add a method to a specific instance of a class?

17:15 <virtuoussin13> why not just use define_method or whatever?

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17:15 <ccooke> virtuoussin13: that is: "class Foo": A new class named Foo. "class X < Foo": A new class X, inheriting from Foo. "class << x": Access the metaclass of x

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17:16 <elliot98> hello

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17:16 <virtuoussin13> ccooke: I see. Why the self; in the body of class << self; self; end ?

17:16 <elliot98> how would it be possible to set up RUBY with COM and be able to read ODL files?

17:16 <ccooke> virtuoussin13: because there, the metaclass you're trying to access is that of self - your own metaclass.

17:17 <ccooke> virtuoussin13: define_method will, in class context, add new methods to the class. If you create a new object in the same class, you'll see the new method.

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17:17 <ccooke> virtuoussin13: if you define methods in a metaclass, they are specific to the one object the metaclass is tied to.

17:18 <virtuoussin13> but couldn't you do x = A.new; x.define_method(:whatever, whatever) ?

17:18 <ccooke> virtuoussin13: so, you can define a new method "bar" which is unique to a single instance of the object.

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17:18 <Seppman> Just one fast and simple question: Whats the fastest way to switch a boolean to its opposite, like if bool = true then bool = false else if bool = false then bool = true

17:18 <ccooke> virtuoussin13: but x is not a class, and thus does not have the define_method method :-)

17:19 <ccooke> Seppman: !bool is usually used

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17:20 <virtuoussin13> so is that the only way to add in an instance method to a specific object?

17:20 <Seppman> thanks a lot. and i can simply do !bool or is it better to use bool = !bool?

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17:20 <ccooke> virtuoussin13: it's certainly the *cleanest* way :-)

17:20 <virtuoussin13> I see

17:21 * Seppman hasn't got it when the fuction changes the object itself or makes a changed return value

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17:22 <virtuoussin13> where can I find the documentation for stuff like method_added, extended, or whatever?

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17:22 <blueadept> how can you check if value is an array or not?

17:23 <blueadept> kind_of?(Array)?

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17:23 <elliot98> basically, there's some ODL files along with some DLLs and want to know how to insert them into RUBY

17:24 <rippa> blueadept: also #is_a?

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17:26 <blueadept> cool

17:26 <blueadept> thanks!

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17:28 <ccooke> virtuoussin13: google is pretty useful, there ;-)

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17:28 <virtuoussin13> I mean, I did

17:28 <virtuoussin13> and I get blog posts

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17:29 <Seppman> i did it with bool = !bool, that will work in any case

17:29 <virtuoussin13> it doesn't seem to exist on ruby-doc.org

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17:30 <virtuoussin13> the defined method doesn't not appear in the API for object, module, or class

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17:31 <virtuoussin13> googling for ruby callbacks gets me the blog post where I first heard about method_added

17:32 <virtuoussin13> google for "ruby extended method" and several variations just gets me tons of documentation for the "extend" method, and stuff about how to extend classes in Ruby

17:32 <virtuoussin13> so no ccooke, google not pretty useful here at all

17:32 <ccooke> http://ruby-doc.org/docs/ProgrammingRuby/html/ref_c_object.html - fourth link here from google "method_missing"

17:33 <virtuoussin13> i'm not asking about method missing

17:33 <virtuoussin13> none of the methods I'm talking about are listed in there

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17:33 <ccooke> Veejay: okay. http://ruby-doc.org/docs/ProgrammingRuby/html/ref_c_module.html

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17:34 <ccooke> Fourth link from method_added on google ;-)

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17:34 <virtuoussin13> ccooke: I assume that was for me?

17:34 <ccooke> aye.

17:35 <ccooke> virtuoussin13: look at Class, too

17:35 <virtuoussin13> why does that method not appear in www.ruby-doc.org/core-1.9.3/Module.html

17:35 <virtuoussin13> is it deprecated or something?

17:35 tsousa [tsousa!~tsousa@188.251.92.164] has joined #ruby

17:36 <tsousa> in how much time can i learn ruby?

17:36 <virtuoussin13> tsousa: 4 years and 5 days

17:36 <virtuoussin13> exactly

17:36 <tsousa> i already know some python and some c and some haskell

17:36 <virtuoussin13> 4 years and 4 days if you're REALLY good

17:36 <jesseangell> tsousa: in that case…about 5 years to unlearn all that

17:36 <virtuoussin13> don't look haskell and c tho

17:36 <virtuoussin13> *unlearn

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17:37 badabim_ [badabim_!~badabim@17.212.167.10] has joined #ruby

17:37 <tsousa> yeh thanks is that i need to write an webpage for some small organization

17:37 savage- [savage-!~savage_@istep.static.monkeybrains.net] has joined #ruby

17:37 <tsousa> and i was looking ate ruby

17:37 <tsousa> for start some web dev

17:37 <tsousa> i dont know any web dev stuff

17:37 <virtuoussin13> tsousa: you should consider using assembly for web dev

17:37 <tsousa> yeh thanks

17:37 <virtuoussin13> :P

17:37 <tsousa> vou are beeing very helpfull

17:37 <virtuoussin13> fwiw, I could pick up ruby in maybe a week

17:38 <virtuoussin13> that was just ruby itself tho, I dunno how long it would take to learn Rails

17:38 <jesseangell> tsousa: honestly..the best web dev solution these days is: https://github.com/jayferd/balls

17:39 <virtuoussin13> jesseangell: I'm shocked that exists

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17:40 <jesseangell> virtuoussin13: its my favorite enterprise stack…beats java at least

17:40 <virtuoussin13> hah

17:40 <tsousa> jesseangell, yeh that should be awesome to write a medium website + meeting/organization technology

17:40 <savage-> hi

17:40 apok [apok!~apok@c-107-3-149-167.hsd1.ca.comcast.net] has joined #ruby

17:41 <savage-> wow, limechat is WAY better than colloquy

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17:50 <davidcelis> if you're not gonna go with command line, textual is probably the best OS X IRC client

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18:10 <Dreamer3> can i have an initializer return a different class?

18:10 <Dreamer3> like a subclass?

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18:10 <Dreamer3> Animal.new("dog") => <Dog>

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18:11 <Dreamer3> or do i just need to write a class method to accomplish something like that

18:12 <ccooke> Dreamer3: you can overload self.new if you really want to (you would have to call 'super' in it), but a new factory method would be much cleaner

18:13 <ccooke> (and wouldn't break the principle of least surprise)

18:13 <apeiros_> ccooke: it's not overloading. it's simply defining.

18:13 <apeiros_> (not even redefining)

18:13 <ccooke> apeiros_: this is very true.

18:13 <apeiros_> and I don't think you'd have to call super either.

18:13 <apeiros_> class Animal; def self.new(type); if type == "dog" then Dog.new else …

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18:14 <ccooke> apeiros_: hmm. it's the else that's the problem.

18:14 <apeiros_> or case, or hash-lookup, or const_get with string manipulation, etc.

18:14 <ccooke> apeiros_: if you want to have a possibility of creating an Animal object, anyway

18:14 <apeiros_> ah, ok, yes, then super would be the proper way to go.

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18:14 <ccooke> if you define a .new and do *not* call super, then you cannot create an object of your *own* class.

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18:15 <apeiros_> also you'd have to take care of the redefined super if you inherit from Animal

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18:15 <apeiros_> so Dog.new actually works, if Dog < Animal

18:15 <ccooke> yeah.

18:15 <ccooke> basically, it's quite doable but an absolute minefield.

18:15 <twixmix> Ya I don't really get why you'd do it, seems strange to me.

18:15 <ccooke> hence it being better to use a factory method

18:16 <ccooke> well, if you wanted to do class-level things *before* creating an object, the cleanest option would be to define a self.new and call super in it.

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18:17 <ccooke> a valid option there, for instance, is if you want your class to only have one instance for a particular set of parameters to new()

18:18 <ccooke> you can store the result of super() into a hash, then in new() before calling super you can check the hash and return the pre-existing instance without actually creating a new object.

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18:22 <Dreamer3> ccooke: ah, thanks :)

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18:23 <Dreamer3> does new call initialize then?

18:23 <Dreamer3> guess i can bang out a test

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18:24 <twixmix> Yes new calls initialize

18:24 <ccooke> Dreamer3: yes, it does. If you call super, that'll be handled for you though

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18:24 <twixmix> Dreamer3: Yes, super will also automatically pass along all the method parameters

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18:26 <ccooke> twixmix: well, it will if you call it as "super". If you call "super( params )" then it will pass what you give it.)

18:26 <twixmix> ccooke: This is true

18:26 <Dreamer3> but if i'm overriding the behavior i don't really want to call super, do it? :)

18:26 <apeiros_> it will also pass blocks

18:27 <apeiros_> even with super()

18:27 <Dreamer3> if i'm just calling new on a different class

18:27 <Dreamer3> i'd just have something like a case statement that called new on the appropriate class (for my simple example)

18:27 <ccooke> Dreamer3: will you ever want an instance of the class your modified new is defined in?

18:28 <apeiros_> Dreamer3: why do you insist on new btw?

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18:28 <apeiros_> why not e.g. Animal["dog"].new?

18:28 <apeiros_> that'd not break the "contract" of Class#new

18:28 <Dreamer3> that's a neat syntax

18:28 <ccooke> apeiros_: that's a nice idiom

18:28 <Dreamer3> i don't even think i'd need new :)

18:28 <Dreamer3> Vin["1234567890"]

18:28 <ccooke> Dreamer3: you can get apeiros_'s idiom by defining self.[]

18:28 <Dreamer3> returns the proper object

18:29 <Dreamer3> ccooke: yes i know :)

18:29 <Dreamer3> i hadn't thought of that

18:29 <twixmix> apeiros_: Ya, that's a decent way to do it without breaking new.

18:29 minh [minh!~minh@p5DD7C33D.dip.t-dialin.net] has joined #ruby

18:29 <Dreamer3> apeiros_: i'm not insisting, was just curious :)

18:29 <Dreamer3> using new would just avoid rewriting existing API code :)

18:29 <Dreamer3> since vins are created using new currently

18:30 <Dreamer3> but that can be changed :)

18:30 Skaag_ [Skaag_!~Skaag@67.133.201.89] has joined #ruby

18:30 <Dreamer3> honestly i don't think it's that bad if Class.new returned a subclass of Class to be honest

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18:30 <Dreamer3> Animal.new("dog").bark!

18:31 <minh> Hi there! I'm very, very new to Ruby and wondered how to dynamically/programmatically determine which modules are included by a class (e.g. class 'Range' includes module 'Enumerable' by default)

18:31 <Dreamer3> Animal.new("duck").quack!

18:31 <Dreamer3> but really my case is more about duck typing… when all classes would have a similar API

18:31 <Dreamer3> so you shouldn't care which class your'e working with

18:31 <Dreamer3> but the implimention details would be hidden

18:31 <Dreamer3> anwyays, thanks :)

18:32 <virtuoussin13> I see stuff like ||= and &&= in code. What do those operators mean?

18:32 <deryldoucette> ||= means if the left-0hand is not set (or is nil) then set it

18:32 <virtuoussin13> oh, conditional assignment

18:33 <deryldoucette> yea

18:33 <twixmix> virtuoussin13 basically var || var = []

18:33 <twixmix> var ||= []

18:33 <twixmix> basically return var, or set var to [] if it doesn't exist.

18:34 <atmosx> aloha rubyists

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18:38 <twixmix> yo

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19:14 <LMolr> Hi, we are planning to make a simple invoice/quote application, and we would like to release it as both a web application and a native application. Anyone knows some references to architectural patterns to start an analysis? Thanks

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20:07 <dagobah> How do I map rows in a database to (as yet uninitialized) ruby classes?

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20:14 <heimark> anyone have a moment to help me with a question about modules?

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20:17 <Mon_Ouie> Probably, but don't ask to ask anyway

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20:19 <heimark> haha, ok.. i'll just ask then

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20:20 <heimark> i am trying to write a set of methods to prettify console output that is tabular (in a table)

20:20 <heimark> so it has nice lines

20:20 <heimark> i am using a module and including it across classes

20:20 <heimark> but want a way to set the border character

20:21 <heimark> where the default border character is "|" but this can be changed with accessor methods

20:21 <heimark> whats the right way to do that in ruby?

20:21 <heimark> *if there is a 'right' way

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20:22 <Mon_Ouie> You can use instance variables for that (including instance variables of the class itself)

20:22 Squarepy [Squarepy!~Luuk@ip82-139-118-42.lijbrandt.net] has joined #ruby

20:23 <heimark> and instantiate the variable in the module?

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20:24 <Mon_Ouie> A variable is never "instanciated" or "defined", it exists as soon as you set it to something

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20:26 <heimark> ok, but where would I set the initial value, to make sure that there is a default?

20:26 <heimark> like this? http://pastebin.com/2jL8GJFT

20:27 <heimark> are those second and third methods redundant?

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20:28 <Mon_Ouie> Defining initialize in a module is something you should avoid, as that doesn't play well with superclasses

20:28 <heimark> ok

20:29 <Mon_Ouie> I'd remove that method and define the getter as @tableprint_border ||= "|"

20:29 <heimark> ah, that works

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20:29 <heimark> can't believe I didn't think of that

20:29 <heimark> there's no way to do this with like attr_accessor?

20:31 <Mon_Ouie> attr_* family can be used as long as the name of the method matches the name of the ivar

20:31 <Mon_Ouie> If you have many similar methods, you can always define your own methods similar to attr_accessor

20:32 <heimark> ah, that's clever

20:32 <heimark> thank you very much

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20:32 <Mon_Ouie> (Using define_method or possibly class_eval to avoid some overhead)

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20:46 <v0n> some gems need to require 'rubygems' with Ruby 1.8. What is the best way to make this work with every Ruby version? require 'rubygems' is enough (I guess it won't matter with Ruby 1.9)?

20:46 <v0n> I often see something like require 'rubygems' if RUBY_VERSION == ...

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20:47 <v0n> not really cool :/

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20:49 <moshef> i have an array of hashes, how do i check if there is a certain value within one of the hashes?

20:49 <moshef> i can't include because it will try to find something that match the entire hash

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20:51 <canton7> moshef, array_of_hashes.any?{ |arr| arr.include?(value) } maybe?

20:51 <canton7> s/arr/hash

20:51 <moshef> thought there might be an easier way...

20:51 <moshef> thanks tho

20:52 bradly [bradly!u5445@gateway/web/irccloud.com/x-kaomuyinggaidovc] has joined #ruby

20:52 <moshef> canton7: but this checks the entire hash, isn''t it ? I'm a bit confused

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20:53 <canton7> did you want to know whether one of the hashes includes a certain key or a certain value?

20:53 <jY> anyone use thin and know if it's possible to log the url each thin process is handling in it's log?

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20:54 <moshef> value

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20:55 <moshef> any?{|hash| hash.has_value?(2969)) this works

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20:55 <canton7> yeah, was going to say you need has_value? in that case

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21:01 <moshef> canton7: awesome, thanks buddy

21:01 <moshef> got another question

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21:01 <moshef> i have an array with some values

21:01 <moshef> could be 1, 5, 21, whatever

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21:02 <moshef> now i'd like to get the last 20 values of this array

21:02 <apeiros_> moshef: ri Array#last

21:03 <moshef> apeiros_: great, tnx

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21:07 <bradly> Is there a better way of normalizing an array and single object besides [var].flatten ?

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21:11 <apeiros_> bradly: ?

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21:12 <bradly> So i have a object that is sometimes an array and sometimes a single object that I would like to normalize into an array no matter what

21:12 <bradly> aperios_: does that make sense?

21:12 <apeiros_> bradly: normalize at the source. that's the best solution

21:13 <apeiros_> also, use tab completion for nicknames. spares you the embarrassment…

21:13 <apeiros_> if you insist on normalizing at the wrong place, look at Kernel#Array and Array::wrap

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21:16 <bradly> apeiros_: Thanks. I get the var from an API and the API returns a single object if only 1 record is found, but an array of objects if multiple are found. The [obj].flatten works but it isn't clear the purpose of the code to someone reading the code.

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21:17 <apeiros_> bradly: that sounds like a stupid API

21:17 <bradly> apeiros_: lol. I agree!

21:18 <apeiros_> anyway, the methods I named you are less potentially dangerous than flatten and the tool for such things.

21:18 <canton7> I've seen [*might_be_an_array] around -- not sure what you make of that, apeiros_

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21:22 <apeiros_> canton7: the most appropriate method is Array::wrap IMO. the others will iirc use to_a if available which is potentially dangerous. I'd have to check whether that's still true in 1.9.3, though.

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21:25 <canton7> apeiros_, is that a rails addition? Doesn't seem to be in native ruby

21:25 <apeiros_> oh, seems like :(

21:25 <apeiros_> incredible. I usually know such things otherwise.

21:26 <tensai_cirno> Very tricky question. I would like somehow redefine raise for Object, but I don't want to catch rescued exceptions. Any points?

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21:30 <apeiros_> catching exceptions is impossible anyway…

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21:34 <tensai_cirno> apeiros_, I can catch raised exceptions

21:36 <shevy> I can catch butterflies

21:36 <shevy> I dont really use catch/throw though

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21:40 <zeshoem> How do I fix these errors? http://pastebin.com/C5ifzRy3

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21:43 <zeshoem> I am having trouble installing Ruby 1.9.3 root@ubuntu:~# rvm install 1.9.3

21:43 <apeiros_> tensai_cirno: actually no, you can't.

21:44 <tensai_cirno> apeiros_, uhmm, i mean _hooking actions_, not actually catching

21:44 <tensai_cirno> to raised events

21:45 <shadoi> that is the strangest way to extract an archive.

21:45 <shadoi> zeshoem: the download is probably corrupt

21:45 <apeiros_> tensai_cirno: rescue. catch is something different.

21:46 <shevy> zeshoem you can use "tar" in one go without the need of |

21:46 <shadoi> tar jxf file.tar.bz2 -C outdir

21:46 <shadoi> shevy: but he's not doing it, rvm is. :)

21:46 <shevy> tar -vjxf

21:47 <shevy> ? he is using tar there, isn't he?

21:47 <shevy> oh

21:47 <shevy> indeed

21:47 <shevy> I think rvm makes people dumber

21:48 <shadoi> you can tell is a programmers solution to a sysadmin problem.

21:48 <shadoi> s/is/it's/

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21:58 <Boohbah> shevy: it certainly did that to me

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22:00 <zeshoem> I got past the first install, but gems isnt installing

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22:00 <zeshoem> undefined method `map' for Gem::Specification:Class (NoMethodError)

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22:02 <zeshoem> http://pastebin.com/VTuXfGN5

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22:08 <luxurymo_> how can i make a regex to find some portion of a string and stop when it encounters the first "?"

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22:09 <Confiscative> Hi. I'm running OSX and rvm on MRI Ruby 1.9.2. I want to compile C extensions. How would I get access to ruby.h with rvm?

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22:13 <burgestrand> Confiscative: when you write C extensions you write a mkmf script; running it with a ruby installed through RVM will do the right thing

22:13 <burgestrand> Confiscative: http://guides.rubygems.org/c-extensions/

22:14 <burgestrand> Confiscative: in your C code you reference it with “#include <ruby.h>”

22:15 <Confiscative> I did that, and I now see that some paths in the Makefile are set to the correct directory in ~/.rvm

22:16 <Confiscative> Still I'm getting the error: ruby.h: No such file or directory

22:16 stringoO [stringoO!~JLstring@bas1-toronto42-1279599116.dsl.bell.ca] has joined #ruby

22:17 <Confiscative> In the Makefile, topdir and hdrdir are set to the correct directory.

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22:17 <burgestrand> Confiscative: I take it you generated the makefile with the extconf.rb-script you’ve written, and did not write it yourself?

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22:19 <Confiscative> Sorry, yes. The extconf.rb in ext/foo/ generates it.

22:19 <Confiscative> My Rakefile specifies: Rake::ExtensionTask.new("foo")

22:20 <burgestrand> Confiscative: using rake-compiler, I take it?

22:20 <Confiscative> Yes, but I did follow a guide that uses 'Hoe'. (this guide: http://tenderlovemaking.com/2009/12/18/writing-ruby-c-extensions-part-1/)

22:21 <Confiscative> I'm scrolling through the guide you linked now.

22:21 <burgestrand> It’s all great, but it’s more things to troubleshoot and take into account when things don’t work. I’d try a bare-bones example just to make sure things work first. I should have one around somewhere that should be just download and compile…

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22:23 <burgestrand> Can’t find it, bugger.

22:24 <Confiscative> I'll follow the thing you linked and see if I get the error again :)

22:24 <Confiscative> I didn't really like using that 'hoe' gem I know nothing about anyway ;)

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22:26 <burgestrand> Confiscative: good luck, I’m not sure I’ll be around when you’re done, but if you run into issues again you could try asking in #ruby-lang

22:26 artOfWar [artOfWar!~artofwar@nat/yahoo/x-nlswxgaizfwnkisa] has joined #ruby

22:26 <burgestrand> (the channel is pretty much the same as this one, but tends to be more active at this hour than this channel and often the answers/questions in there have better quality(

22:26 <jamiemill> Why might the rubygem God say "using event system: none / [fail] event system did not load" on ubuntu 11?

22:27 <burgestrand> jamiemill: if I recall correctly, God can use certain ways to listen for events rather than polling for them, I don’t remember what kind that is on the top of my head

22:29 <jamiemill> burgestrand: Yes I believe so - I'm using the chef "god" recipe to install so hoped it would just work. I did set up manually on ubuntu 10 and don't remember having this problem

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22:31 <mister_m> what does |= do?

22:31 <mister_m> is that bitwise OR

22:32 <burgestrand> mister_m: yes, don’t confuse it with ||= though

22:32 <mister_m> burgestrand: I won't. thank you

22:33 <burgestrand> mister_m: and it’s | itself that is bitwise OR, the = is assignment, x |= y is x = x | y

22:33 <burgestrand> mister_m: same way like +=, -=, *=, /= works

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22:41 <Confiscative> burgestrand: The building works alright now. Thanks for the help :)

22:41 <burgestrand> Confiscative: awesome :)

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22:53 <graft> okay, quick and dirty to make an MxN array with some initial value, e.g.: [ [ nil] * m ] * n

22:53 <graft> except that doesn't work, because you get n copies of the same array

22:54 <graft> you can do it with map, e.g.: ([ 0 ] * n).map{|a| [nil] * m}

22:54 <graft> but that seems ugly and wasteful

22:54 <graft> anyone got a neater idea?

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22:59 <canton7> graft, Array.new(m){ Array.new(n) } is maybe the clearest

23:02 <graft> canton7: yeah that works

23:02 <graft> canton7: could be prettier, but oh well :(

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23:42 <ale`> hi, I'm using rspec-rails-watchr for the ruby on rails tutorial (M. Hartl). When I save a controller, watchr doesn't correctly match the modified file and `m' variable (I printed it as m.to_a) in watchr.watch ('^(?:app|lib|script)\/(.*)(?:\.rb|\.\w+|)$') {|m| ... } has the value ['app/controllers', 'controllers']. Any clue what's wrong? (I'm using ruby 1.9.2, on ubuntu 11.10)

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23:45 <choffstein> Hey all. I'm trying to use Mongoid with BigDecimal and keep getting that BigDecimal can't be serialized by BSON. The mongoid docs say that the field-type BigDecimal can be used -- and I was sort of expecting some automatic serialization and deserialization from a string. Any ideas where I am going wrong?

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23:49 <kenneth> hey, so i have a syntax error on this line: :next => {|r,c| {:r => r,:c => c+1}}

23:49 <kenneth> this is when defining a hash

23:49 <kenneth> and i want to set :next to a block

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23:51 <baroquebobcat> kenneth: you can't use blocks that way. you need a lambda or a Proc

23:51 <kenneth> ah

23:52 <baroquebobcat> :next => lambda {|r,c| ...

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23:53 <kenneth> right, awesome thanks

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23:55 <kenneth> simple program, creating a matrix: https://gist.github.com/f63427fb298e19960033

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23:55 <kenneth> i get two syntax error i don't understand:

23:55 <kenneth> spiral.rb:39: syntax error, unexpected keyword_end

23:55 <kenneth> spiral.rb:44: syntax error, unexpected $end, expecting keyword_end

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23:56 <baroquebobcat> kenneth: ruby doesn't have a ++ operator, you need to do +=1

23:56 <kenneth> aha i keep forgetting that