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/
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<sullx>
i have a page parsed with nokogiri, there are 100 elements that each have 4 pieces of data I need to save. how can I do this in one pass? currently I am looping through the page four times, each time using a different xpath for the different piece of data for each element
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<gate>
axl_: that's part of the regexp. /^bob$/ will only match strings that are exactly "bob"
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<axl_>
gate: i am now using ===
<axl_>
my_regex === my_string
<gate>
axl_: I don't think that does what you need, /bob/ === 'bobette'
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<axl_>
hmm...
<axl_>
interesting
<axl_>
k
<axl_>
thanks!
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<whitenoise>
hi all, I am trying to setup a project where I use ActiveRecord with sqlite3 and can use rake and all that stuff, but I don't know how to create the rakefile so that I can do what I need to do without Rails
<robacarp>
whitenoise: well, I don't *know* but I expect you could just generate a rails project, copy out the rakefile and delete the project...
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<whitenoise>
robacarp: no, Rakefiles in Rails are just two-liners.
<whitenoise>
They use a class method for the application generated
<gate>
robacarp: nope, rails rakefiles use load_tasks from the application class
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<gate>
whitenoise: so you are trying to get the rake db:create tasks and the like?
<robacarp>
well, then I'd go read the methods and see what they do...
<whitenoise>
gate: yeah
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<whitenoise>
gate: i found a Rakefile online, but it was Mysql-specific.
<gate>
so since it's part of activerecord, you likely just have to include it correctly
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<ereslibre>
is gem also ignoring --install-dir for you ? `sudo gem install gem-0.0.1.gem` will install the gem in /root/.gem. Running `sudo gem install --install-dir /usr/lib/ruby/gems/1.9.1 gem-0.0.1.gem` still installs the gem in /root/.gem. Ideas ?
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<td123>
ereslibre: let me guess, are you using arch? :{
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<ryannielson>
Is there an array method to return all indexes that match what I'm looking for? For example, if have the array ['cat','dog',cat']. I want a method that returns [0, 2] given 'cat'
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<td123>
I don't know a function like that, but you can easily write it yourself with each_with_index
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<banister_>
ryannielson: a.each_with_index.select{ |k, i| k == "cat" }.map(&:last)
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<ryannielson>
banister_: Thanks, I'll give that a shot. Didn't see each_with_index in the docs
<msch>
is there a different method to build a hash like inject but where i don't have to always return the memo object? e.g. [1,2,3].inject({}) { |hash, e| hash[e] = Kernel.rand }
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<seanstickle>
reduce is such a nicer term for injedct
<msch>
seanstickle: thanks. but that has way worse performance doesn't it? i think i'll just stick with reduce :/
<seanstickle>
msch: You didn't specify it had to have better performance
<rexbutler>
Okay folks, question here. How would using arrays like [u,v], hashes like {x_coord: u,y_coord: v}, and an pair class with attr_accessor's compare speed wise?
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<seanstickle>
Goddamn people and their hidden requirements.
<seanstickle>
rexbutler: test it
<msch>
seanstickle: hehe :) sorry
<msch>
seanstickle: it doesn't have to have better performance, just not worse :)
<rexbutler>
seanstickle: I probably would learn more that way, true
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<seanstickle>
msch: also, the performance difference is negligible
<seanstickle>
On a million runs, the difference is 0.2 secs
<msch>
seanstickle: interesting, i'm already so burnt by ruby's performance that i don't trust it even a little bit :)
<seanstickle>
Use JRuby then
<seanstickle>
Freakishly fast.
<seanstickle>
For a Ruby
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<msch>
seanstickle: i know, i just have to convince my team that it isn't "java hurr durr evil"
<msch>
seanstickle: also doesn't help that (before the JIT warms up i guess) it's niceable slower when running Rails in dev mode
<msch>
s/niceable/noticable/
<seanstickle>
True
<seanstickle>
Still, better than SmallTalk Ruby
<seanstickle>
Or Gemstone Ruby, or whatever that was called
<seanstickle>
Which tanked
<msch>
maglev :)
<seanstickle>
That's the one
<msch>
never evaluated it's performance on rails. just played a bit with it's distributed features. which were very nice.
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<seanstickle>
Yeah, well, Cardinal was cool too. :)
<msch>
i have high hopes for rubinius. i don't need v8-like speed, but python-like would be nice :)
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<seanstickle>
Well, it's still based on 1.8.7, right?
<lachyg>
Ruby Noob Here: If I'm parsing a ruby file into a Ruby AST library (RubyParser, Ruby2Ruby)... How can I extract the methods from the tree?
<cout>
seanstickle: what do you mean "based on"?
<msch>
seanstickle: the current master on github which should become stable 2.0 soon has a working 1.9 mode. afaik the only thing that stops them from releasing 2.0 is that encoding support isn't fully done
<seanstickle>
"For now Rubinius is targeting MRI 1.8.7"
<seanstickle>
Is what I mean
<cout>
so "compatible with"
<seanstickle>
Sure.
<banisterfiend>
cout: hey homie, do you know much about LD_PRELOAD and dynamic linking in general? when overwrite rb_raise() with my shim (via LD_PRELOAD) i occasionally get some weird happenings, complaints about missing symbols (specifically _environ) and so on. Any idea?
<msch>
seanstickle: https://github.com/rubinius/rubinius Rubinius currently is compatible with Ruby version 1.8.7. Support for Ruby version 1.9.2 is coming soon.
<seanstickle>
msch: right, so what I said.
<cout>
banisterfiend: weird
<msch>
seanstickle: yes. still, with rails 4.0 i expect them to scramble to release a 1.9 compatible version soon
<banisterfiend>
cout: it generally works though, i just get a bunch of warnings
<msch>
banisterfiend: you can't inject that into a running ruby process right? so no EE.intercept! in environment.rb?
<banisterfiend>
cout: it generally works though, i can intercept exceptions like 1/0 or name errors
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<banisterfiend>
msch: if you're talking about the C exception stuff, you have to start the process with `pry-shim` or `pry --c-exceptions -w` cos you need to load the shim when the process starts AFAIK
<banisterfiend>
msch: but if you're just talking about intercepting normal ruby exceptions, that can be done at runtime
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<msch>
banisterfiend: yep. yeah i know intercepting normal ruby exceptions works prefectly, was just thinking that you were planning on replacing whatever hacks you use now with the shim
<banisterfiend>
maybe cout knows a way to override C functions at runtime
<banisterfiend>
msch: the shim is the way we do it now, hehe, it's just kind of noisy and unreliable :/
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<msch>
banisterfiend: yep, i'm fighting with it right now :) doesn't want to intercept NoMethodError for some reason...
<cout>
banisterfiend: dlopen with RTLD_GLOBAL, I think
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<cout>
banisterfiend: but I'm not sure how to get ruby to call dlopen
<banisterfiend>
msch: ah yeah, NoMethodError is one we dont yet support
<msch>
banisterfiend: ah that explains that :)
<banisterfiend>
msch: the way ruby deals with exceptions under the hood is pretty ugly, there's like 3 or 4 different methods it can invoke to raise exceptions, it's like they kept refactoring the API and didnt update old code
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<banisterfiend>
msch: sometimes they use really low level functions like rb_exc_raise() other times they use rb_raise() and othe rtimes still they use high level functions like rb_name_error()
<msch>
banisterfiend: sounds awesome.... thanks for investing the time :) *holding my fingers for rubinius*
<banisterfiend>
makes it really hard to catch everything
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<banisterfiend>
msch: i just got pry-stack_explorer working on rbx :)
<banisterfiend>
PEE shouldn't be far behind
<wefawa>
Does ruby have any methods for "groupping"? (like SQL Group by?)
<msch>
banisterfiend: nice. although i was thinking that everyone migrates to rbx so you don't have to hack around MRI's warts
<banisterfiend>
yeah that would be nice, rbx is really nice to work with
<banisterfiend>
cout: oh ok thanks, but the library (that makes use of the shim) generally doesnt work on 1.8 anyway as it's build on the binding_of_caller hack that i wasn't able to backport to 1.8
<banisterfiend>
built*
<cout>
banisterfiend: sure, but you want to be forward-compatible too
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<banisterfiend>
cout: good point
<cout>
banisterfiend: I was just giving the 1.8.x dir for reference in case you have other code that might make use of it
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<banisterfiend>
oh ok, thanks, i would like to get binding of caller working in 1.8, ill probably give it another try sometime but it seems pretty difficult
<alexonthemoon>
hi, quick question guys. how do I use ruby to select an option from a dropdown list?
<cout>
banisterfiend: you should also include <stdarg.h> since you are using va_start
<alexonthemoon>
I have the option value and the dropdown 'name' but I don't know how to format the command correctly
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<cout>
banisterfiend: I don't get any warnings when I run: LD_PRELOAD=~/.pry-exception_explorer/1.9.2/lib_overrides.so ruby1.9.2 -e ''
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<msch>
alexonthemoon: you mean in Ruby on Rails?
<banisterfiend>
cout: did you install pry-exception_explorer ?
<banisterfiend>
cout: can you try: pry --c-exceptions
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<cout>
banisterfiend: no, I just built the code you pasted earlier
<banisterfiend>
cout: oh ok
<cout>
I was hoping it would just boil down to a simple test case
<alexonthemoon>
anyone? :/
<cout>
is pry-exception_explorer a gem?
<banisterfiend>
cout: well if you just run ruby executable it generates no warnings for me either, it's when you use it with a larger program that the warnings appear to arise
<msch>
alexonthemoon: are you using Ruby on Rails?
<alexonthemoon>
msch: hi thanks for your time. no, i'm using ruby
<msch>
alexonthemoon: ok, then i have no idea what you mean by dropdown :)
<alexonthemoon>
msch: I have <select name="state">
<alexonthemoon>
msch:and then option value="AL"></option>
<cout>
using gem... here goes my download quota for the month :(
<alexonthemoon>
msch: and I'm trying to get ruby to select the option "AL" from the drop down list
<banisterfiend>
cout: haha, dont worry about it man
<banisterfiend>
cout: dont waste your quota on this :)
<cout>
banisterfiend: I'm kidding
<msch>
alexonthemoon: that's HTML not ruby :) you need to do <option value="AL" selected></option>
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<banisterfiend>
cout: i was hoping :)
<alexonthemoon>
msch: right, I'm using ruby to select the option "AL" from HTML that already exists
<cout>
banisterfiend: I know that historically gem has liked to download lots of data (kinda sucked when I was on a modem)
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<msch>
alexonthemoon: so you are web scraping?
<alexonthemoon>
msch: yep
<cout>
hmm.
<cout>
ERROR: While executing gem ... (NameError) uninitialized constant Encoding::US_ASCII
<alexonthemoon>
msch: no worries, they aprove scraping, just can't distribute it to anyone else
<cout>
I've never seen that before.
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<msch>
alexonthemoon: ah ok. no idea then, sorry.
<banisterfiend>
cout: me either
<alexonthemoon>
msch: no worries, thanks for your time regardless :)
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<nobitanobi>
I'm under 1.9.2p290 - When I do this: s = "asd#d" ; s =~ /[~!@#$%^&*()]+/ - I get a syntax error, unexpected ']', expecting tCOLON2 or '[' or '.' -- Anybody knows why_
<nobitanobi>
<cout>
I probably shouldn't bother trying to get this to work on ruby 1.9.2-preview1
<banisterfiend>
cout: Yeah
<banisterfiend>
my test environment is 1.9.3, but i have travis setup to test on 1.9.2 as well
<banisterfiend>
but never -preview :)
<cout>
travis?
<banisterfiend>
cout: travis-ci.org
<cout>
I downloaded it some time in 2009 and it's always been close enough to the real thing until now
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<banisterfiend>
cout: travis is a great little project, automatically tests your app on a huge range of rubies whenever you make a commit
<banisterfiend>
for pry itself we test on about 4-5 different rubies iirc
<rexbutler>
Of course there are other things I could test
<banisterfiend>
rexbutler: well a hash is a much more complicated object than an array
<rexbutler>
banisterfiend: What surprised me is that objects are pretty fast
<laidback_01>
hey, honestly, I don't know if I'm in the right channel. I'm trying to install a RoR app (tracks - getontracks.org) with postgresql. there's a file, deploy.yml, where i have to define my database. I've tried pg, postgres, psql, postgresql. None of these seem to work. I'm trying to find out where Ruby's "cpan" is so I can work through this. Sorry if I sound like a total newb.
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<banisterfiend>
so setup times are going to be a bit more expensive
<banisterfiend>
laidback_01: #rubyonrails
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<rexbutler>
banisterfiend: I'm looking more closely at the write times
<rexbutler>
banisterfiend: I mean, the objects are FASTER
<banisterfiend>
rexbutler: objects that have < 3 ivars work a little bit like arrays iirc
<banisterfiend>
it embeds the objects in the object struct itself
<laidback_01>
ok thanks
<banisterfiend>
hte ivars*
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<rexbutler>
but after 3 ivars how do objects hold up?\
<banisterfiend>
rexbutler: probably a bit worse as they have to then create an external ivar table
<banisterfiend>
so they'd perform more like hashes i guess
<rexbutler>
banisterfiend: Clearly I have a lot to learn
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<banisterfiend>
rexbutler: this is implementation details really
<banisterfiend>
you dont need to know this unless you're hacking on internals
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<rexbutler>
So, is MRI/YARV holding up well vs Python?
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<cout>
what is that supposed to mean?
<rexbutler>
cout: Shouldn't have phrased it as a negative
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<rexbutler>
cout: Esp. considering this is the ruby channel?
<swarley>
so, potentially noobish question. I want to add a method ('->') to class Foo
<swarley>
Is it possible
<rexbutler>
I meant speed wise
<cout>
rexbutler: about the same, depending on who you ask
<banisterfiend>
rexbutler: run that benchmark on 1.8
<cout>
IMO cpython has a slight advantage in that it is reference counted, which gives more predictable results for some applications
<banisterfiend>
my guess is objects would be proportionally slower
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<cout>
python likes to allocate memory for all its integers, while ruby prefers to use bit tricks to avoid allocating memory (at the expense of bit manipulatino)
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<rexbutler>
Hmm... As a langauge I like Ruby, but Python has lots of neat libraries I wish I could use, being a math afficianado
<banisterfiend>
rexbutler: was i right about 1.8
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<rexbutler>
banisterfiend: Remind me... right about what?
<banisterfiend>
rexbutler: run the benchmark under 1.8
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<rexbutler>
banisterfiend: One second, I'm new to rvm, etc...
<cout>
swarley: I believe you will be able to add such a method but you won't be able to call it easily
<banisterfiend>
swarley: you will probably have trouble as -> is now syntax
<banisterfiend>
in 1.9
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<rexbutler>
banisterfiend: compiling...
<swarley>
banisterfiend, got any docs as to its use?
<swarley>
i suppose i could have self.- return itself and then use self.>
<banisterfiend>
swarley: it's just a lambda
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<rexbutler>
banisterfiend: Yeah, I was expecting something like that the first time
<swarley>
oh
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<rexbutler>
banisterfiend: Well, thanks for the feedback
<banisterfiend>
rexbutler: yeah, the diff IMO is due to the embedded ivars in 1.9
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<cout>
banisterfiend: still compiling 1.9.2
<banisterfiend>
cout: haha
<banisterfiend>
cout: which patchlevel? 290? :)
<cout>
banisterfiend: but I believe those warnings are either because you are on osx (is that right?) or they are coming from somewhere other than that little extension you pasted earlier
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<cout>
banisterfiend: 290, yeah
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<banisterfiend>
cout: i get similar kinds of warnings on linux too
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<sunaku>
Companion! previously a plain old method or variable name; now a supreme constant!
<Companion>
???
<sunaku>
hehe never mind. just jabbering about your nick rename ;)
<sunaku>
slow night in #ruby eh? (crickets chirping)
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<randym>
lmao
<randym>
sunaku thanks for the smile
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* epochwolf
sips his beverage
<Companion>
sunaku, its 7 AM here
<epochwolf>
10pm here
<Companion>
Raspberri pi website is down :(
<Companion>
just when I wanted to order :@
<epochwolf>
also, 7am is too damn early.
<sunaku>
p Time.now.localtime
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<sunaku>
alas, i forget that we rubyists are truly world citizens
<epochwolf>
What's this world you speak of?
<sunaku>
i heard that it exists beyond $RUBYLIB. how unthinkable!
<Companion>
This store is currently unavailable. Please visit our main website at www.raspberrypi.org.
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<sunaku>
Raspberry Pi - An ARM GNU/Linux box for $25. Take a byte!
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<TomWork>
hey guys, I am output=%x[a_python_script]
<TomWork>
I can do print output but I can't chop or chomp it
<TomWork>
any why ?
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<canton7>
might the python script be writing to STDERR? What happens if you don't print it -- any output?
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<CacheMoney>
I'm having trouble determining how to organize my classes. I'm creating a script to record Basketball stats and so far I've written my Player and Shot class http://pastie.org/3486090 However, I don't think I'm organizing this correctly. Does anyone have some insight?
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<TomWork>
canton7: ta you're right
<TomWork>
fixed
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<Jonah11_>
can someone tell me why only 5 of the assertions are being run in this TestCase: http://codepad.org/svVMkKRB
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<MIST_`>
anyone gotten their hands on a raspberry pi yet?
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<canton7>
apparently a lucky few have
<canton7>
looks like they went through the phone system very early on, before it clogged up
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<MIST_`>
ah
<MIST_`>
i actually got access to the site but i couldn't find ap lace to order
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<MIST_`>
it just said "show ur interest"
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<Bulkior>
Hi, does anyone know anything about writing a bandwidth tester in ruby?
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<KaZeR_W>
hi there
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<KaZeR_W>
i need to extract a substring matching a regexp. i'm using .scan. so far it works (if i 'puts' the result of the scan i get the expected content). but the result isn't a string, so i can't use it in a string concatenation
<KaZeR_W>
what am i doing wrong?
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<ccapndave>
KaZeR_W
<ccapndave>
Oops
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<ccapndave>
KaZeR_W scan returns an array
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<KaZeR_W>
ccapndave, yep. so two questions :)
<KaZeR_W>
is scan the best way to do this?
<KaZeR_W>
why does .flatten doesn't work when i want to concatenate the result with another string?
<ccapndave>
I'm not 100% sure about this, but I think scan returns tag & search pairs
<ccapndave>
Have a go with match instead
<KaZeR_W>
ok thanks
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<ccapndave>
Dunno if this is the best way, but this works: "Hello".match(/H/).to_s
<KaZeR_W>
ok thanks trying right now
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<canton7>
KaZeR_W, if you do #scan with bracketted stuff, it returns arrays of arrays
<KaZeR_W>
erm, canton7, could you expand a bit please?
<KaZeR_W>
canton7, in my case i'm sure that i will be getting only one result. is it worth using scan in this case (i'm thinking of php's preg_match vs preg_match_all for example, even if i'm not sure that scan works in the same way)
<canton7>
KaZeR_W, if you're dead certain you'll be getting one result, there's no point in using #scan methinks. Just use #match, as suggested
<KaZeR_W>
great thanks
<ccapndave>
canton7: Is it 'good' Ruby to use to_s on it or is that dirty?
<canton7>
also, re another question of yours, .flatten turns a multi-d array into a 1-d array. It's still an array
<ccapndave>
canton7 to turn the MatchData into a string
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<canton7>
ccapndave, according to the docs, #to_s returns the entire matched string, so should be fine
<canton7>
using [0] *might* be clearer though
<KaZeR_W>
canton7, ah, so i did misunderstood .flattern. to_s was probably what i wanted
<ccapndave>
Cool
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<canton7>
KaZeR_W, yeah, or #join, or something
<ccapndave>
I am trying to learn to be elegant in Ruby :)
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<KaZeR_W>
canton7, join, right!
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<alagu>
Hello, I have a heterogeneous array (different objects) and each object has <=> implemented. But when I do .sort, it throws ArgumentError: comparison of X with Y failed
<alagu>
how do I compare heterogeneous arrays?
<KaZeR_W>
works now :) thanks a lot ccapndave and canton7 !
<canton7>
alagu, can you compare X and Y directly?
<shevy>
can ducks sing?
<canton7>
they try...
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<shevy>
I like em. they are made from good stuff
<shevy>
alagu the objects that you compare must be comparable to one another
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<alagu>
shevy: canton7 how do i check if two objects are comparable?
<shevy>
if you have "access" to them, you can try to do .. include Comparable
<canton7>
alagu, you said both object implemented <=>. I was suggesting you try X <=> Y directly
<shevy>
"You can redefine the == method to give your objects custom behavior when it comes to equality testing."
<alagu>
yes, let me check that. thanks canton7 and shevy :)
<shevy>
yeah, just put the logic in that method body
<banisterfiend>
shevy: sup
<shevy>
banisterfiend die!
<shevy>
whops, sorry
<shevy>
wrong idiom
<shevy>
I meant
<shevy>
banisterfiend hi!
<shevy>
I am still rewriting ...
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<MIST_`>
fcking hell they're sold out now
<MIST_`>
xD
<MIST_`>
and RS hasn't even started selling'em
<peterhellberg>
MIST_`: Raspberry Pi?
<shevy>
can it be eaten
<MIST_`>
peterhellberg: yes
<MIST_`>
shevy: it can, but i doubt there is much nourishment
<peterhellberg>
MIST_`: I wonder how long it will take before the second batch is on the market
<shevy>
:(
<shevy>
we need organic computers
<MIST_`>
edible computers, then i would have no computer at all
<peterhellberg>
Oh, and more related to our interests; Has 1.9.3 been ported to ARM with decent performance yet?
<shevy>
well just take one bite and let it regrow slowly
<shevy>
eat slow ARM
<MIST_`>
i would like if you would not eat my arm
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<MIST_`>
peterhellberg: i'm assuming it'll be atleast a few weeks unfortunately
<peterhellberg>
MIST_`: Yeah, I figured as much
<MIST_`>
don't give up hope yet though, RS seems still to have some in stock although their site won't allow it. You can order by phone if ur that desperate
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<peterhellberg>
MIST_`: I got the mini2440 in the mean time
<peterhellberg>
MIST_`: It doesn’t come with a compiler though, so I need to jump through some hoops to get custom binaries running on it :)
<MIST_`>
well i guess then u got ur addiction sorted i guess ;) i only got a ion2 to play with, i need arm
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<MIST_`>
well need.. do we really need theese things? haha ;)
<peterhellberg>
I was in China last week, they have some crazy electronics markets in Shenzhen
<MIST_`>
i'm going there in april
<shevy>
whoa
<MIST_`>
^^
<MIST_`>
landing in beijing where my cousins live
<shevy>
you speak mandarin?
<peterhellberg>
MIST_`: I can recommend the SEG electronics market (赛格电子市场) in Futian
<MIST_`>
unfortunately not, i only speak swedish, german, dutch and english
<MIST_`>
my mom speaks mandarin though, i guess i'll have to pick it up eventually
<peterhellberg>
MIST_`: A bit far from Beijing though :)
<shevy>
I dont know what WikiContent and Issue are. It's easier to try with two very small test objects first
<alagu>
shevy: true, let me try that out
<shevy>
The important part is this: "The class must define the <=> operator, which compares the receiver against another object, returning -1, 0, or +1 depending on whether the receiver is less than, equal to, or greater than the other object."
<shevy>
so you must make sure that your class returns -1 0 or +1
<shevy>
"Also, notice that you automatically get the == method by defining the spaceship, so you don't need to provide separate equality behavior for your object any more."
<bgupta>
Trying to figure out if it supports "subtasks"
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<ccapndave>
Dunno if anyone uses RubyMine or IntelliJ, but if so does anyone know how to get the debugger to kick in when an exception happens instead of only on breakpoints? (This might actually be a more general ruby-debug question for all I know...)
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<banisterfiend>
ccapndave: pry can do that (for ruby exceptions anyway) not sure about ruby-debug
<ginsun>
Is it possible to do a recursion based on the input's type? I have a bracketed array and I need to recursively call a function on the leaves (the tree is represented as a nested/bracketed array of arrays). I know how I would do that in Haskell and OCaml but I'm not sure if this is the way one would have to implement it like that in Ruby
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<stenno>
ginsun, hmm thats a nice one
<stenno>
you can test the class with obj.class?
<stenno>
and then you could implement it just like in any other language, recursivly
<ginsun>
stenno, oh ok, I'll do that then
<stenno>
let me write up a quick example if you need it
<ginsun>
stenno, I should be fine, thank you!
<stenno>
kk :)
<stenno>
ginsun, sorry, its obj.class and not obj.class?
<stenno>
iirc the question mark indicates boolean return by convention
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* apeiros_
wonders what a bracketed array is…
* apeiros_
wonders what other kinds of arrays exist
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<stenno>
well if they call it 'nested/bracketed' i assume a bracketed array is an array in an array :)
<stenno>
so i herd u liek arrays...
<stenno>
sorry
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<stenno>
one could extend the Array class or an instance with such method
<stenno>
although i have to admit i am kinda scared of extending instances :/
<stenno>
doesn't feel right :)
<apeiros_>
stenno: ever wrote class methods?
<stenno>
yes...
<ginsun>
stenno, hahaha
<apeiros_>
then you already did…
<ginsun>
stenno, ("so I herd u liek arrays...")
<apeiros_>
I hope you weren't too scared ;-p
<stenno>
ooh i get it!
<stenno>
right!
<stenno>
had to think a bit >_>"
<apeiros_>
^^
<stenno>
ruby is strange
<apeiros_>
it's one of the cool things about ruby IMO
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<apeiros_>
the basic principles are very simple
<apeiros_>
there are only instance methods.
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<apeiros_>
only modules can hold methods.
<apeiros_>
that's it :)
<apeiros_>
(ok, +inheritance, +weird class variables, +someotheroddstuff)
<stenno>
there are not even public attributes in ruby. right?
<stenno>
all these are public instance methods which return the private attribute
<apeiros_>
there are no attributes
<apeiros_>
attr_* define methods
<stenno>
yes
<stenno>
and whats with @foo ?
<apeiros_>
there is public/protected/private - but that's mostly to be considered "an advice"
<apeiros_>
those are instance variables
<stenno>
aren't these private instance attributes?
<stenno>
yeah
<apeiros_>
you can only ever access ivars if you're in the right scope. no chance otherwise whatsoever
<apeiros_>
so the only two ways to read an ivar are: 1) be in the right scope 2) use a method (and 2 needs 1 to work)
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* apeiros_
off for lunch
<stenno>
so they are really only 'variables in a scope' and not even 'attributes' in that sense
<stenno>
hehe good hunger
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<roolo>
Say i have library working with remote xml. Now i am writing specs for the library and i want to have local testing xml file. Where should i put it?
<roolo>
Into spec/support?
<Kingsy>
I am attempting to learn ruby and I still don't understand what |var| means? what is the point in the || ?
<roolo>
Kingsy: Its variable containing right now iterating item
<Kingsy>
so for example --> Net::HTTP.start( 'www.ruby-lang.org', 80 ) do |http| <-- what is |http|? it could be either the string or the int
<stenno>
Kingsy, http is the thing returned by Net::HTTP.start
<roolo>
Kingsy: I am no sure what start returns :)
<jquorning>
Anyone know why I can't WIN32OLE.new('ADODB.Connection') under CygWin ruby ?
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<solars>
question: if I use CGI.escape for url encoding, and unescape to decode, I get a ' ' for a former '+' - if I use an online tool to do the same it is working - what did I miss here?
<banisterfiend>
cout: did u remember to add --c-exceptions option? i guess u added it :) hmm
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<cout>
banisterfiend: yes
<cout>
but if I remove my hand-built shim and let pry build it, then it still doesn't work
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<banisterfiend>
cout: it doesnt work cos it errors out or it compiles but just doesnt work?
<cout>
no errors
<banisterfiend>
i guess it just doesnt work based on what u said before, yeah
<cout>
it just doesn't do what you tell me it should do
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<banisterfiend>
cout: when in pry, type show-method raise
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<cout>
running ubuntu 10.04 with a fresh build 1.9.2p290
<bsdbandit>
morning all
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<bsdbandit>
im a python coder but looking to learn ruby to develop my websites
<cout>
banisterfiend: what's that supposed to tell me?
<j0bk>
Hello, anyone knows how I can serialize data with ruby and sqlite3?
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<banisterfiend>
cout: that it's not a problem with the ruby code it's strictly a problem with the shim (in case u had doubts)
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<cout>
banisterfiend: I have no idea where the problem is; I just know it's not a result of the changes I made
<gener1c>
is there a built in way to html escape a string?
<gener1c>
uri escape maybe would be a better choice of words
<gener1c>
like < > and : and ;
<banisterfiend>
cout: yeah, i know it's not, it's likely a basic misunderstand i have about the way shims / LD_PRELOAD / the details of this kind of dynamic linking works
<gener1c>
i want to make em their equivalent html code...
<banisterfiend>
misunderstanding*
<cout>
gener1c: require 'cgi'; p CGI.escape('<foo>bar</foo>')
<cout>
banisterfiend: well I'd love to help debug it, but I need to pack for my big race this weekend
<gener1c>
thanks
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<cout>
banisterfiend: (hoping our car can place in the top third this time)
<v0n>
hi
<banisterfiend>
cout: np thanks a lot for taking a look at it
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<banisterfiend>
cout: goodluck! :)
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<cout>
thanks :)
<cout>
I'll be afk and back all day
<v0n>
is there a good doc to write a generic Rake task? I mean something to require, which automatically add a new task to the Rakefile
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<j0bk>
I got it
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<j0bk>
Marshal.dump(something) and Marshal.load(something) for serializing
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<cout>
j0bk: not particularly useful if you want to be able to run queries on your data :(
<JonnieCache>
the built in one is probably fine though unless you need to parse megabytes of json per second for some reason
<mikepack>
JonnieCache: That's "built in"?
<JonnieCache>
no thats not built in
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<JonnieCache>
but ruby stdlib does include a json parser as of ruby 1.9 i think
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<apeiros_>
JonnieCache: disagree
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<mikepack>
JonnieCache: Hm, not sure which library that is
<apeiros_>
depending on the context, a couple of KB can be sufficient to make the built-in a bad choice
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<mikepack>
JonnieCache: I might use the ActiveRecord JSON parser but I've heard it's not performant
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<apeiros_>
mikepack: it's activesupport, not activerecord. you can tell rails to use another one.
<JonnieCache>
apeiros_: really? the stdlib one is a ragel parser apparently. is it that bad compared to yajl?
<mikepack>
Whoops, yeah, that's what I mean :)
<apeiros_>
JonnieCache: I thought they had used the pure ruby one?
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<apeiros_>
JonnieCache: hm, might be that it's just rails that uses the pure-ruby json parser
<JonnieCache>
hmm well whenever i build ruby with rvm or rbenv it pulls in some C source for a json parser and builds it
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<JonnieCache>
that implies theyre not using the pure one
<JonnieCache>
but either way if you need fast stream parsing yajl is just a command line away, and it can override the JSON object to seamlessly replace the original api
<JonnieCache>
so no problems :)
<apeiros_>
mikepack: ActiveSupport::JSON.backend = 'json_gem' # that's what I use
<mikepack>
apeiros_: Thanks
<apeiros_>
afaik is the json_gem still the fastest, even if only academically faster than yajl
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<JonnieCache>
json.org is the best. there should be more state diagrams like that in programming documentation
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<apeiros_>
JonnieCache: true. I like the ones in the sqlite docs
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<Kingsy>
guys, I am following a tutor and I am a little confused about this statement --> kitty_toys.sort_by { |toy| toy[:shape] }.each do |toy| <-- isnt kitty_toys.sort_by.each do |toy| the same thing? why do you have to use the {block} ? the contents of that do nothing
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<JonnieCache>
you have to tell it what to sort by
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<Willejs>
hi, is anyone familiar with nokogiri? I'm not sure how to deal with tags with prefixes like so <news:Snippet>
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<phragg>
when running 'rails generate model tag name:string post:references' i misspelled references and now my rake db:migrate keeps aborting, what should I do?
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<TTilus>
just delete files the generator created and generate again
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<JonnieCache>
better than that just edit the migration manually
<phragg>
ah, thanks a bunch
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<JonnieCache>
you shouldnt rely on the generators like that, learn to use the syntax yourself
<JonnieCache>
its not complicated, the generators are just there for convenience
<robacarp>
^^
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<shevy>
oh man
<shevy>
I should have never tried to rewrite 80 .rb files
<JonnieCache>
lol what do you mean when you say rewrite
<shevy>
JonnieCache I tried to change a few core classes that were too big
<shevy>
but a change at the bottom of this pyramid, requires some other changes in the middle part of it
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<shevy>
and it is not as straightforward as I thought it would be
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<shevy>
and now... I am losing fun to continue :(
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<MrGando>
Hey guys, if I have an array of Objectes in ruby, how can I find an object whoose value equals to something in the Array ?
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<JonnieCache>
shevy: yeah its a bastard isnt it. i feel for ya
<robacarp>
CannedCorn: I bet you can combine our approaches to get SSL and basic auth!
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<robacarp>
np!
<CannedCorn>
what if i want to set headers though
<robacarp>
of that I am unsure
<CannedCorn>
i can just set them on request object
<CannedCorn>
brilliant dude
<CannedCorn>
thanks
<robacarp>
:-D np, good luck
<CannedCorn>
net/http documentation kind of sucks
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<Tasser>
net/http kind of sucks
<robacarp>
mikewintermute: what are you trying to accomplish with a regex?
<Tasser>
CannedCorn, jruby? HttpClient is nice. otherwise curb
<CannedCorn>
is the form data a hash?
<mikewintermute>
robacarp: I'm just working my way through the Ruby Regex docs. The regex works in rubular but not irb. wondered why.
<CannedCorn>
yeah true thanks Tasser
<Tasser>
CannedCorn, depends.
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<robacarp>
well, mikewintermute, I suppose it could be an irb parsing issue, but write it into a .rb file and run it to see
<Tasser>
CannedCorn, in crub probably, httpclient not. but there's a bunch of metadata there, so a hash would be a bit complicated
<robacarp>
CannedCorn: the post *can* be a hash, or you can just set the request body to some text directly...I've had to do both
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<MrGando>
Hey guys, I'm trying to find an element in my array using array.find but I'm getting a wrong number of arguments error… could anyone help me a bit ? https://gist.github.com/2abeb525959416fc9ed1
<CannedCorn>
wait so robacarp what is post when it comes in
<CannedCorn>
thats a string right?
<robacarp>
ummmm...I think so, lemme check
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<robacarp>
well, you get back a httprequest object, and .body has a string containing the data...but I don't think its considered POST data
<MrGando>
CannedCorn yeah, email_string it's a string
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<robacarp>
MrGando: well, that gist isn't really helpful...how about some context? what is designers?
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<MrGando>
robacarp hey :), designers is an array of Designer objects, each designer object . I think I just solved the issue :)
<CannedCorn>
which is better rest client or httparty
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<stenno50>
are these two even comparable?
<CannedCorn>
yeah, why wouldn't they be
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<stenno50>
eh didn't know httparty was restful
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<CacheMoney>
I am building some classes to track Basketball stats. I want to build a relationship of Player has_many Shots. How do I create a new player and then attribute shots to him?
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<CacheMoney>
is has_many only a Rails method?
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<Tasser>
what would you use for textile generation?
<Tasser>
moustache? :-)
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<nobitanobi>
What's the best way to add key/value to an existing hash? is it my_hash[:key] = value ?
<stenno50>
for example
<stenno50>
a very direct, good approach :)
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<davidcelis>
nobitanobi: Yes.
<nobitanobi>
ok, thanks guys
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<gate>
nobitanobi: if you need to add many keys at the same time, you can do my_hash.merge! :key1 => value1, :key2 => value2
<nobitanobi>
oh, that is beautiful. thanks
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<martman>
is there a easy way to get a name of a method? looks like objects can do something like self.name, but i dont see anything for methods
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<martman>
(im passing them as arguments and would like to print their names)
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<deryl>
are you meaning something like var.methods ?
<deryl>
to see what methods are avail on a particular object?
<mikewintermute>
Nowaker: split() would work but I'm trying to use a regex to help me understand it.
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<martman>
anyone know?
<stenno50>
martman, i'd say not possible :)
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<Nowaker>
martman: how should that work?
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<martman>
Nowaker: im guessing just like it does for classes
<martman>
Nowaker with alittle preprocessor magic i could do this in c easily enough
<Nowaker>
but I don't know what you want to achieve with this: def self.check(getFunc, setFunc, setVal, msg)
<Nowaker>
what is it intended to do?
<SeanLazer>
OO design question: I have a system where Estimates create jobs, and when those jobs are done they come back and create an invoice. When an invoice is created it has to combine information from the job and the estimate to be pre-populated. The behaviour to do this is fairly complicated, does it belong in the Invoice class or should I create a class whose sole responsibility is to create Invoices?
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<aaronpeterson>
I have the ruby module active in netbeans 6.9.1 yet I have no erb mime type. Do I need something else?
<martman>
Nowaker: it runs getFunc, calls setFunc with setVal, calls getFunc again, and compares the returns of the 2 getFuns
<martman>
Nowaker so basic unit test
<martman>
Nowaker i just want to print out the names of the functions when something fails
<martman>
Nowaker so i dont need that msg arg
<shevy>
SeanLazer, if the code stays small, it is easier to keep it in the Invoice class
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<mikewintermute>
odd - so here we only get "a" in words -> words = /\w+/.match("a b c")
<SeanLazer>
shevy: it has the potential to get pretty big... maybe i need to think about how i want this code to look
<mikewintermute>
must be missing something obvious
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<shevy>
and what is "words"?
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<shevy>
ah
<shevy>
I guess it is the ' '
<nfarring>
What is the Ruby way to define a factory method?
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<shevy>
mikewintermute, see: "a b c" =~ /(.+)/; $1 # => "a b c"
<shevy>
I suppose \w stops at ' '
<nfarring>
def FooMaker(stuff) should return Foo(other stuff)
<shevy>
that looks terribly un-ruby
<nfarring>
actually Foo.new(other stuff)
<martman>
Nowaker that make any sense?
<mikewintermute>
shevy: yeah - Perly
<shevy>
I mean the def Foo thing for a method name if they are not class methods :)
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<nfarring>
shevy, should I just use two different constructors?
<shevy>
nfarring it all depends on your needs. if you need a method to instantiate a specific class, that's the way to go
<shevy>
two different constructors? what is that?
<nfarring>
Foo.new(arg1, arg2) is one constructor
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<nfarring>
Foo.new(hash) is the other constructor
<shevy>
ah, you want to call with different parameters?
<shevy>
but I have to finish my current rewrite first
<Chaazd>
Is it possible to list all the directories in an amazon cloud directory?
<shevy>
yeah
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<robert_>
aha.
<shevy>
it misses quite some features... but for easy pdf generating it is ok
<nfarring>
shevy, thanks I will give it a try
<shevy>
prawn has become like the BULLDOZER
<aaronpeterson>
oh I did it. Didn't realize I needed the ruby and rails plugin.
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<Nowaker>
martman: it's possible, without any problem
<Nowaker>
martman: give me a second
<robert_>
like, I can't figure out which end is "up" in the pdf documenjt
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<robert_>
document*
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<robert_>
[ 0, 0 ] or [ document-height, document-width]
<robert_>
lol
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<swarley>
I'm looking to give a socket a certain ammount of time to connect or it no longer blocks, point me to a doc?
<robert_>
shevy: If you maintain fpdf, you should add helpers to it.
<shevy>
helpers?
<shevy>
well, you will be able to report the issues to github then :)
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<robert_>
like, I generate PDFs with dashed borders
<shevy>
I am finally making progress with the porting of the other project, very slowly but still
<shevy>
ah
<robert_>
i.e. "cut here"
<shevy>
I see
<robert_>
sections on the page
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<CacheMoney>
I know I'm doing this incorrectly because now that I want to add a Rebound class I won't be able to access the previous instance variables in the Shot class http://pastie.org/3490845 Any advice on how I should refactor my classes?
<robert_>
I like prawn's "markup"-style api though
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<shevy>
how is it doing that markup style api?
<shevy>
or rather, what the hell is markup styled api anyway :D
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<shevy>
CacheMoney I think you can call super() in your subclassed class
<shevy>
that copy paste in initialize looks a bit odd otherwise
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<shevy>
you also have lots of instance variables
<martman>
Nowaker: thats the start of it, yeah. my question was on how do i print the names of the functions for whats pass in for getter and setter
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<shevy>
perhaps it may be better to use one hash instead
<martman>
Nowaker if they really were called getter and setter id like to be able to print out "Unit test failed: getter()/setter()" or something like that
<shevy>
at least in the last class
<CacheMoney>
shevy: yeah, I'm new to using classes -- mostly been doing proceedural math problems with Ruby.
<shevy>
CacheMoney it is usually best to stick to ways that work and only slowly change them
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<shevy>
because that code in itself does not seem to be *doing* much
<robert_>
that's "markup"-style
<robert_>
as in text, bounding_box, etc.
<shevy>
it's nothing more than just a collection of data structures your code has right now. barely any behaviour
<robert_>
like I said; I'm trying to pick up how prawn works by slowly writing something using it. :p
<shevy>
interesting robert_
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<shevy>
one reason I want to take over that rfpdf is because I also need pdf things for ruby web stuff
<CacheMoney>
shevy: again I'm new to Classes. But I'm attempting to record stats from the command line and I need somewhere to store the commands
<robert_>
but the way it's working right now, I can't find the top/left of the document
<robert_>
lol
<shevy>
from the command line?
<Nowaker>
martman: I don't get it. let's say we have class Test; attr_accessor :blah; end. my method would be called that way: check(Test.new, 'blah', 'blah=', 'new_val', 'msg')
<shevy>
hmm is that the full code? I dont see an ARGV used
<CacheMoney>
yeah... just to familiarize myself and then move it to the web
<CacheMoney>
shevy: right now I'm just doing x = Player.new... x.ftmiss.... x.threemake... etc
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<shevy>
yeah
<shevy>
weird method names btw ;P
<CacheMoney>
then i print out the results using x.shot_info
<CacheMoney>
haha its my rough draft
<martman>
Nowaker oh sorry, didnt realize that. that should work perfect then
<martman>
thanks alot
<CacheMoney>
BUT... I don't know how to attribute shots, or rebounds or assists to a player based on my class structures/inheritances
<Nowaker>
martman: 'send' method dynamically calls the method from the string parameter - have fun
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<CacheMoney>
shevy: any advice on how I should move forward
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<robert_>
shevy: I see. I'm trying to write more or less a script polls a directory for filesystem changes
<robert_>
and then parses the new files
<shevy>
CacheMoney unfortunately I dont really know what you are trying to do
<robert_>
and gneerates a pdf from the data contained inside said new files
<shevy>
you can remove some of the code though
<shevy>
unless @name == nil
<shevy>
should be equal to
<shevy>
if @name
<shevy>
hmm
<jdstroy>
Hello. Are there alternatives to DRbUndumped? There's a class that I want marked as "pass by proxy" only, and I cannot change it (because it is part of the CLR runtime in IronRuby).
<shevy>
also I wonder if you really need all those instance variables
<CacheMoney>
shevy: I guess I don't really know what I'm trying to do... I want to create 5 instances of a Player. And each Player will have name, age, height, and weight. But also depending on what they do in a game, they will Shoot, Rebound, Assist, etc
<CacheMoney>
shevy: should I put all the shot, rebound, assist, etc in the Player class?
<shevy>
so the first thing is, focus on that player class and finish it
<shevy>
well I guess so
<shevy>
for now, just put it there
<CacheMoney>
okay
<shevy>
if you need to change it lateron you can do so anyway
<shevy>
it is easy to make simple code more complicated :)
<shevy>
but making complicated code simple is not so easy
<CacheMoney>
ok. i think i was trying to make it more complicated. I guess I thought each statistical category (shot, rebound, etc) should be placed in its own class
<CacheMoney>
shevy: what were you saying about all the unnecessary initializations?
<shevy>
CacheMoney well I think you can use super() instead but perhaps start from scratch with a class Player first
<CacheMoney>
shevy: okay. I'm going to finish up the Player class and then I'll get back to you with what I have. Thanks for your guidance
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<scalebyte>
somebody just help me pls... :(
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<pangur>
I have a long array of data - about 300 items - (surname, forenames, age, telephone, puppets,science). The data consists of 50 sets such as I have mentioned. How can I go through the list picking out each set of data?
<nfarring>
pangur: yes I saw that but I did not want to use the mixin
<nfarring>
maybe I should use the mixin?
<Tasser>
what would you use to test text output? a diff comparison built-in would be nice
<pangur>
I know that in python that if you use for a definition a reserved name, you will have problems. Imagine it is the same in ruby.
<Tasser>
I can use assert_equal or something similar, but that won't help while debugging
<nfarring>
pangur: pretty sure that assert is not reserved in Ruby
<Tasser>
pangur, nope, assert isn't. And def case(foo); end is valid ruby
<pangur>
The other thing that I have noticed, nfarring, is that if ignoramuses like me start offering advice, people who really know will chime in eventually :)
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<pangur>
So, I feel that I help by encouraging those who really know to pipe up :)
<nfarring>
pangur: I probably know less than you about Ruby. Anyway here is the solution: http://pastie.org/3491057
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<pangur>
Thanks nfarring. I am forever learning.
<Willejs>
can anyone help with my nokogiri xml problem?
<moshef>
how would you reject empty value from hash and get the keys of those values?
<moshef>
something like coll_hash.reject!{|k,v| v.empty? k << non_public_colls} . is it possible in one sentance?
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<pangur>
I want to group items in a list into data belonging to a person. There are 60 such persons' data in the list. How do I pick out successive groups of say 6 fields?
<pangur>
or six elements rather.
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<moshef>
anyone?
<pangur>
Is there a ruby port of kohana, I wonder.
<llaskin>
i don't understand why split is private method here...
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<robacarp>
llaskin: you appear to be calling .split on an array, is that what you meant to do?
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<llaskin>
yes
<robacarp>
also, you don't need to declare your type when you define m
<llaskin>
i know i don't
<heftig>
also that first line is horribly wrong already
<llaskin>
i'm just trying to helpyou guys understand the problem
<mononofu>
I get this error when trying to run a script: "./cp2s3.rb:59:in `require': no such file to load -- aws/s3 (LoadError)"
<llaskin>
thats not my result
<mononofu>
but in irb, I can load aws/s3 just fine
<llaskin>
" site_id = site_link.find_element(:xpath, "./../..").attribute("class").scan(/(site_id-.*) summary/)" returns that first line of [["712 summary-index-23 even"]]
<mononofu>
am I complete ruby noob, so I guess I'm missing something
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<llaskin>
was just trying to slim down the output for u guys
<mononofu>
*I am
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<robacarp>
I see
<llaskin>
robocarp so any thoughts?
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<tkellen>
is there a way to launch irb and run arbitrary code besides -r? like, can you inline the code you want to run right in the command?
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<heftig>
you probably want m[0][0].split[0]
<robacarp>
tkellen: you can just say `irb`
<robacarp>
llaskin: I agree with heftig
<robacarp>
I don't think you can use .split on arrays
<tkellen>
robacarp: no, i want to include some files and run a few lines of code (and i don't want it in my dotfiles)
<tkellen>
s/include/require some gems
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<robacarp>
tkellen: what I do in that spot is have that code in a file and do "load 'file.rb'"
<robacarp>
you don't have to restart irb to get it to reload the file, just hit the load command again
<tkellen>
robacarp: that is what i'm doing right now and exactly what i'm trying to avoid, if possible
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<robacarp>
tkellen: well, the other option is to use ruby debugger
<CacheMoney>
shevy: Here is my updated Player class http://pastie.org/3491222 Now, how would I initialize a game and record 5 different players stats, at the end print out the sum of all 5's points, shots, rebs, etc?
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<a1ph4g33k>
tkellen: you can put any arbitrary code you want to happen every time you load IRB into ~/.irbrc
<tkellen>
robacarp: i don't think you understand. i'm trying to write a oneliner that i can use to launch irb and run a few commands immediately after, without using the -r switch
<tkellen>
a1ph4g33k: i already said i didn't want it in my dotfiles
<heftig>
tkellen: or do require 'irb';IRB.start(__FILE__) in your code when you want to launch an IRB session
<llaskin>
robocarp, sorry my internet cut out, did you respond?
<robacarp>
tkellen: well, whats wrong with loading a file then
<robacarp>
llaskin: there is no .split method for arrays
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<tkellen>
robacarp: i want to throw this in my rakefile without having to have a separate file to maintain
<robacarp>
llaskin: even if there was, I'm not sure what .split[0] would even mean
<tkellen>
robacarp: short of echoing it to a file and then loading irb with -r and rming it after, i'm unclear if this is possible
<robacarp>
tkellen: waitwaitwait you want it to be in a rakefile?
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<robacarp>
mikewintermute: thats not odd behavior at all
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<tkellen>
robacarp: this is whati have now task :console do
<tkellen>
sh 'irb -r ./tasks/console.rb'
<tkellen>
end
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<heftig>
mikewintermute: array.each just returns the array after iterating
<tkellen>
i want the contents of console.rb in the rakefile, so i don't need the console.rb file at all
<heftig>
so that gets printed
<tkellen>
the contents of console.rb load up the environment for an app i'm building
<a1ph4g33k>
robacarp: I didn't see that.
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<robacarp>
a1ph4g33k: eh?
<tkellen>
it's just a few lines of code--i don't want the extra file, i just want to inline them as i launch irb
<llaskin>
i got it
<llaskin>
m[0].flatten[0].split[0] allows it to work
* robacarp
facepalm
<a1ph4g33k>
robacarp: A rake file is just ruby code.
<mikewintermute>
robacarp: so why does test.count("a") output data to the console differently?
<mikewintermute>
i.e. in lines 8 and 13
<robacarp>
a1ph4g33k: yes, I am aware of this. why are you telling me?
<heftig>
mikewintermute: because array.count returns the count, so that gets printed
<a1ph4g33k>
robacarp: you can just use a HEREDOC to have the code you want and pipe that into your irb session.
<heftig>
mikewintermute: in your iteration, you just throw the result away
<tkellen>
a1ph4g33k: can you show me a pastie of that? that is exactly what i want to know, how to pipe code into irb as it launches
<mikewintermute>
heftig: which is why it gets output on line 8, right?
<robacarp>
a1ph4g33k: you're trying to give advice to tkellen, not me.
<heftig>
mikewintermute: IRB will output whatever your code snippet returns
<tkellen>
a1ph4g33k: as far as i can tell, the only way to load arbitrary code is using the -r switch and giving it a file
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<tkellen>
(or having it in your dotfiles, which doesn't make sense in this case)
<mikewintermute>
so, why doesn't anything get output on line 13?
<heftig>
mikewintermute: if you use puts, you're doing additional output besides the REPL
<heftig>
mikewintermute: because you're not telling it to output
<robacarp>
O.O
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<mikewintermute>
heftig: puts isn't being used until line 19
<heftig>
you're just basically saying, count this and then do nothing with it
<heftig>
because .each does not care about the return value of the block
<mikewintermute>
gotcha - so if you're within an each iterator output is suppressed?
<robacarp>
mikewintermute: no
<heftig>
it's not suppressed
<robacarp>
there is no output being made
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<a1ph4g33k>
robacarp: are you looking to have irb run something and just give output, or are you looking for a live console AFTER the code has been run?
<robacarp>
you need to distinguish between output and repl
<robacarp>
a1ph4g33k: DAMMIT MAN I'm not looking to do anything!
<a1ph4g33k>
robacarp: just trying to help.
<robacarp>
yes, which is all well and good but I'm not the one looking for help!
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<tkellen>
a1ph4geek: yes, i want a live console after the code is run
<sungji>
What's the correct way to do the following in ruby: class_eval %Q(' @attr_name = ... ') ? I.e. I'd like to refer to attr_name within the string after class_eval
<pangur>
array.each_slice(6) {|a| p a} worked perfectly for me, a1ph4g33k, Mon_Ouie, and workmad3 :)
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<sungji>
Mon_Ouie: class defines attr_name and I'd like to refer to it in the string after class_eval... do I have to refer to it by using #{attr_name} ?
<robert_>
shevy: so is the top of the document 0, or the height of the document? because I can't tell.
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<shevy>
lol
<shevy>
no idea yet
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<shevy>
davidcelis, well the Encoding is the worse joke ;)
<davidcelis>
lol
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<CacheMoney>
I want to call a method, and inside this method I want to call a couple other methods that all ready exist in the same class. I tried putting the desired methods into an array and then cycling through the array to call each individual method but it's not working. Any ideas? http://pastie.org/3491762
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<CacheMoney>
having trouble specifically with 'def display...'
<pangur>
Although c.each_slice(6) {|a| p a} works for me (i.e. prints out the an array per person), how do I actually access/manipulate these inner arrays? How do I refer to them individually?
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<themadcanudist>
hey guys…i have a capistrano question. Can I easily remove the chmod g+w action that happens in the default deploy method?
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<pangur>
How can I refer to an internal array of array.each_slice(6) {|a| p a} ?
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<CacheMoney>
how do I call other methods from within a method?
<apeiros_>
pangur: what's an "internal array" there?
<apeiros_>
CacheMoney: def foo; puts "foo"; end; def bar; foo; end; bar # prints "foo"
<apeiros_>
CacheMoney: also, read a book. there's free ones online.
<pangur>
Well, I had a long array of 360 elements (actually data belonging to 60 people). I want to be able to access each person's data.
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<CacheMoney>
apeiros: I've tried implementing what a book told me to do and it isn't working, which is why I'm here asking a questions and posting my code (above) http://pastie.org/3491762
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<pangur>
array.each_slice(6) {|a| p a} broke the 360 elements into 60 sub arrays, as it were.
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<robacarp>
CacheMoney: currently looking at your code, what are you trying to accomplish
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<pangur>
each sub array has 6 elements
<CacheMoney>
robacarp: I want to call the function display, as opposed to calling def player_info, and then def shot_info (and a couple more)
<robacarp>
pangur: a is an array, you should be able to do a[0]
<pangur>
surname, name, age, telephone, puppets, science are the fields.
<pangur>
ok, thanks, shall try that straight away, robacarp.
<CacheMoney>
i'm going to try what apeiros suggested
<apeiros_>
CacheMoney: you meant by name?
<apeiros_>
CacheMoney: as in, how to properly write line 43 of your paste?
<CacheMoney>
apeiros_: yes
<apeiros_>
see Object#send: send(:foo)
<robacarp>
CacheMoney: oh, I see what you're trying to do... just call the method
<robacarp>
CacheMoney: also, you're missing a comma on line 42
<apeiros_>
pangur: you can also do: ary.each_slice(6) { |surname, name, age, telephone, puppets, science| … }
<CacheMoney>
robacarp: thanks. So, you mean just do def display; player_info; shot_info; end;?
<robacarp>
CacheMoney: yes.
<CacheMoney>
okay thanks
<Rorgo>
is there a file that lists locally installed gems, a la 'gem list'?
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<apeiros_>
Rorgo: I don't think so
<seanstickle>
Rorgo: gem list > gem-list.txt
<Rorgo>
heh, thanks.
<pangur>
ah, apeiros, sorry I was creating an fpaste while you were speaking :)
<Boohbah>
these are apparently the fastest algorithms for evaluating poker hands
<apeiros_>
lol, "The beauty of this system is that if you multiply the prime values of the rank of each card in your hand, you get a unique product,"
<pangur>
apeiros - c.each_slice(6) { |surname, name, age, telephone, puppets, science| p surname, name, age, telephone, puppets, science } - Do I need the 'p' after the bar?
<apeiros_>
he definitively doesn't come from the CS corner…
<pangur>
I am not sure what it does?
<workmad3>
pangur: it prints it
<apeiros_>
p obj --> puts obj.inspect
<workmad3>
^^
<apeiros_>
a short-hand for inspecting data at runtime
<pangur>
<-- blushing because of how ignorant he feels
<apeiros_>
ri Kernel#p
<Boohbah>
apeiros_: please elaborate, why do you lol at Cactus Kev?
<apeiros_>
if you want to see the docs, type the above in your shell
<workmad3>
apeiros_: although it's really 'puts obj.inspect || obj' ;)
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<apeiros_>
Boohbah: in computing, you'll use binary logic to do sets
<Boohbah>
btw, thanks apeiros_ and workmad3 for the suggestions :)
<apeiros_>
Boohbah: iow, each bit in an int will represent the presence/absence of a card
<apeiros_>
easier and quite a bit faster
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<Boohbah>
apeiros_: he does this...
<pangur>
Thanks apeiros_ and workmad3 :)
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<apeiros_>
anyway, bedtime for me
<Boohbah>
apeiros_: the primes are so that we can work backwards from a hand product and find the cards that compose it
<pangur>
Good night :)
<workmad3>
Boohbah: yeah... you know that prime factorisation isn't an easy thing to do, right?
<pangur>
I am still not sure how I would access the inner arrays that I mentioned?
<Boohbah>
workmad3: i understand it as the basis of public-key crypto
<workmad3>
Boohbah: yeah, and that's with two (admittedly very large) primes
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<pangur>
If I say children= c.each_slice(6) { |surname, name, age, telephone, puppets, science| p surname, name, age, telephone, puppets, science }, will that put an array of arrays into children?
<pangur>
It does not seem to.
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<pangur>
How can I put the contents of an each_slice into an array that I can then access?
* pangur
keeps refining his perception of what his problem is.
<workmad3>
pangur: no... if you wanted that, you'd want to do children = c.each_slice(6).to_a
<workmad3>
pangur: also, the each_slice is an iterator method, so it is already accessing each item
<workmad3>
pangur: for example, you can do c.each_slice(6){|...| create_person(...) }
<pangur>
ah, that is what I really want to do.
<workmad3>
(obviously, replace the ... with your variables, I'm just too lazy to write them out ;) )
<pangur>
I understand.
<workmad3>
pangur: or, if you wanted to do that and keep a reference to each person in a new array, you could do people = c.each_slice(6).map {|...| ...}
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<pangur>
workmad3: you are making my head spin :) Thanks, I really appreciate it.
<workmad3>
Boohbah: still, back to your original question - with something like your algoritm, map-reduce is probably the most applicable way to parallelize
<Boohbah>
workmad3: thank you, do you of any tutorials on using these methods?
<pangur>
Basically, I was trying to get data from a csv file and trying to create person objects but although all this data was being revealed by each_slice, I felt that I could not get hold of it. Now I feel more confident :)
<workmad3>
Boohbah: if you search for map-reduce, you should get some good info on it ;)
* Boohbah
performs a world wide web search :)
<pangur>
Basically, I am using a real life project to learn how to do ruby :)
<workmad3>
pangur: always fun :)
<pangur>
Fortunately, there is nobody in a hurry for my processings :)
<Boohbah>
pangur: i think it's a good way to learn, i am doing the same
<workmad3>
pangur: solving real problems is always the better way to learn
<pangur>
Boohbah: I think it makes the Ruby more relevant that way.
<Boohbah>
have you all seen Matz' rubyconf 2011 keynote? i am excited for the future of Ruby on Robots :)
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<RubyPanther>
mRuby!!!! I am excited!
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<RubyPanther>
Boohbah: did you see the RiteVM bytecode screenshot twitter??