#ruby on 2012-02-28 — 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/

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11:27 <theishi> I am trying to write a ruby program that interacts with another ascii based program. For some reason as long as the other program is running, the output of my put statements are misaligned and I cannot get any input from the user

11:28 <theishi> I am not really sure where to go from here... any ideas on how to deal with this? I am using IO.popen

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11:43 <emdub> if i have a hash {"one" => 1, "two" => 2, "three" => 1} and i want to get a list of all the keys that have a value of 1, what's the best way to do that? i'd expect the output of the hash to be ["one", "three"]

11:45 <apeiros_> you'll have to go through hash.each_value

11:45 <apeiros_> or actually hash.each, since you need the key…

11:46 <emdub> ah, okay

11:46 <apeiros_> 1.8 or 1.9?

11:46 <emdub> figured there might be an easier way

11:46 <apeiros_> in 1.9: hash.select { |k,v| v == 1 }.keys

11:46 <apeiros_> in 1.8: hash.select { |k,v| v == 1 }.map(&:first)

11:46 <apeiros_> actually, the latter is 1.8.7

11:46 <apeiros_> 1.8.6 and before: hash.select { |k,v| v == 1 }.map { |k,v| k }

11:47 <emdub> ah cool

11:47 <emdub> thank you sir!

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12:18 <Tasser> The default location of gem installs has changed to $HOME/.gem/ruby

12:18 <Tasser> nice :-)

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12:56 <dominikh> Tasser: source?

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13:01 <KucukMubasir> gosh, I can't join an array of string with ' \ '. I tried ' \\ ' but in this case it puts double \\ instead of one \ . help!

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13:01 <dominikh> KucukMubasir: it does not. you're probably trying it in irb and seeing the \\ in what it prints? that's because the output is escaped

13:01 <dominikh> KucukMubasir: use puts to see what it actually is.

13:02 <KucukMubasir> no, I see it on Console window

13:02 <KucukMubasir> thanks dominikh

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13:04 <Tasser> dominikh, archlinux update

13:04 <dominikh> Tasser: ah, so it's a custom patch of theirs?

13:04 <Tasser> dominikh, I'll take a look

13:05 <Tasser> dominikh, http://sprunge.us/FhRA

13:06 <dominikh> so yeah, Arch-specific thing. awesome...

13:06 <dominikh> $distribution: Changing how your Ruby works since $date.

13:06 <Tasser> dominikh, well, you can create that gemrc yourself

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13:07 <dominikh> Tasser: I know, and I do. my problem is that they are actually changing the defaults

13:07 <dominikh> Tasser: so whenever you have to help someone debug a problem, you have to first remember the oddities of each and every distribution.

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13:08 <Tasser> welcome to linux

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13:10 <Tasser> dominikh, you could also say the gem defaults are opposed to distributions

13:11 <dominikh> Tasser: eh... right, now it's the projects fault that others change its behaviou

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13:14 <Tasser> if there's a bug in your context, you fix it, therefore you change the behaviour

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13:45 <Bartzy> Hi

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13:45 <ccapndave> Hey

13:45 <Bartzy> /var/lib/gems/1.8/bin/ is not on my PATH (I installed rubygems on debian via apt-get) - This is on purpose ? Should I just add it to my path ?

13:46 <ccapndave> bartzy: I think so, or use rvm which will do it automatically

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13:47 <dominikh> and yes, it's on purpose.

13:47 <ccapndave> https://bugs.launchpad.net/ubuntu/+source/gems/+bug/145267

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13:54 <c_ellis_> Hi, I get a segfault on one of the tests for ruby 1.9.3 on solaris 10

13:55 <c_ellis_> 64 bit build. All tests pass on 32 bit one

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14:03 <c_ellis_> would anyone have any idea on how to report this issue?

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14:11 <apeiros_> c_ellis_: ruby-lang.org, on the bugtracker

14:11 <apeiros_> https://bugs.ruby-lang.org/

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14:29 <v0n> hi

14:29 <v0n> Does '.' matchs the current directory on Windows?

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14:30 <apeiros_> I don't use windows, but I'd expect that . is the current working directory in windows too…

14:30 <ccapndave> Yes, it doe

14:30 <ccapndave> *does*

14:30 <v0n> (portability question)

14:30 <v0n> thanks

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14:31 <ccapndave> v0n Its all pretty much the same as *nix except the slashes are the other way around

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14:32 <v0n> ccapndave, doesn't Ruby handle 'path/like/this' on Windows?

14:32 <ccapndave> Yes, I think Ruby deals with it if you always use forward slashes

14:32 <v0n> hum, I don't think so, otherwise File.join & co wouldn't exist...

14:32 <ccapndave> Its doing the conversion under the hood somewhere

14:33 <ccapndave> Sorry, I was talking in general, not about Ruby particularly :)

14:33 <apeiros_> technically it's even the windows API that does the handling (AFAIK)

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14:53 <frerich> Hiya; I'm tinkering with Ruby right now and hit a small problem which some googling didn't seem to answer for me. Maybe somebody here knows better: How can I call a singleton method of some class (as given by 'C.singleton_methods') given an object of that class? Say, if I have a singleton method 'C.s', should 'o = C.new \n o.s' work?

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14:54 <apeiros_> o.class.s

14:54 <apeiros_> @ frerich

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14:55 <andywww> hi, i want to check that 3 strings are the same, can i do this on one statement? like one.eql?(two.eql?(three))?

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14:55 <frerich> apeiros_: Aaaah!

14:56 <frerich> apeiros_: Thanks a ton!

14:56 <frerich> apeiros_: I guess it makes sense now that I think about it; I was too spoiled by other languages to consider this. :-)

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14:56 <apeiros_> andywww: a == b && b == c

14:56 <andywww> and that'll give me a true or false won't it

14:56 <andywww> that'll do nicely, thanks

15:00 <stenno> andywww, your example wouldn't work, as two.eql?(three) would return true, and one would compare with true and thus fails

15:00 <andywww> yeah thats the problem i was having

15:00 <andywww> thanks

15:00 <andywww> i was trying to cut it down too much

15:01 <stenno> one.eql?(two) and one.eql?(three)

15:01 <stenno> that would work too and maybe looks nicer :)

15:01 <apeiros_> [a,b,c].uniq.size == 1 # but that's less efficient…

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15:08 <stenno> b + c == 2 * a

15:08 <stenno> :D

15:10 <apeiros_> o0

15:11 <Tasser> stenno, a*2

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15:11 <stenno> oh >_>"

15:11 <stenno> right

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15:11 <stenno> works for int and string!!

15:11 <stenno> and float

15:11 <Tasser> stenno, b = "aa" c = "" a = "a"

15:12 <stenno> hmpf

15:12 <stenno> fine

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15:13 <stenno> [b,c].inject(true){|x, res| res &&= (a == x)}

15:14 <apeiros_> …

15:14 <Tasser> _wtf_

15:14 <stenno> [b,c].inject(true){|x, res| res and (a == x)}

15:14 <stenno> would be enough i guess

15:14 <CannedCorn> guys, what does ~> mean

15:14 <stenno> huh

15:14 <stenno> i know -> from 1.9.x

15:15 <apeiros_> CannedCorn: context rules, you know?

15:15 <rippa> it's for gem versions

15:15 <stenno> o_O"

15:15 <stenno> there is no ~> operator in ruby that i know of

15:15 <stenno> at least not in <1.9

15:16 <CannedCorn> right

15:16 <CannedCorn> but its in gemspecs

15:16 <CannedCorn> im having a hard time figuring out what it means

15:16 <apeiros_> let me guess - in a *string*?

15:16 <apeiros_> then see what rippa said

15:16 <CannedCorn> i get the gist of it

15:16 <CannedCorn> does it mean it needs to be exactly that version

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15:17 <mtfk> any one have good advice how to create game where user decide what dependencis should be requried for example which adtapter he want to include in his app ?

15:18 <mtfk> CannedCorn: is a bundler thing

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15:18 <mtfk> CannedCorn: http://gembundler.com/gemfile.html

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15:18 <mtfk> check here there is explanation what it mean

15:19 <CannedCorn> perfect, thank you!

15:19 <CannedCorn> >=

15:19 <CannedCorn> nice

15:20 <stenno> i wonder why they didn't use >= then o_O"

15:20 <mtfk> because is not the same

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15:20 <mtfk> ~> mean >= x.y and < Y.x

15:20 <stenno> aah i see

15:20 <mtfk> so higher then this version but lower then new release

15:21 <apeiros_> higher *than

15:21 <mtfk> because for exampel >= 2.1 could be not compatible with 3.1

15:21 <mtfk> so You use the higher number in that tree

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15:21 <stenno> so ~> 2 would get ever 2.x.x ?

15:22 <stenno> every*

15:22 <mtfk> yes but not 3.x.x

15:22 <stenno> yeah

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15:26 <KL-7> hello, everyone

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15:26 <shevy> dumdedum

15:27 <KL-7> can someone explain while in ruby error messages like "NameError: undefined local variable or method `asdf' for #<Object:0x866a94c>" variable name is surrounded with backtick and singlequote?

15:27 <KL-7> and not two single quotes, for example

15:27 <shevy> I think that is a convention

15:27 <shevy> the linux man pages also have that

15:27 <shevy> I guess it defines the beginning, and end, of an important word

15:27 <KL-7> any practical reason behind that?

15:27 <shevy> I myself use two `` within strings instead

15:28 <shevy> no idea but honestly I also don't care about it

15:28 <shevy> perhaps it was used for parsers

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15:28 <KL-7> shevy, neither do I, just curious

15:28 <shevy> I also don't use man pages

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15:29 <c_ellis_> it's fixed in trunk.. just having a hard time tracking down which changeset fixed it :)

15:29 <shevy> hmm when you want to make a .gem ... how do you layout the structure of the program?

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15:29 <shevy> right now I dump pretty every .rb file into lib/

15:29 <shevy> but that leaves out the yaml files

15:30 <shevy> does anyone have a .gem spec where the yaml files are explicitely mentioned?

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15:32 <KL-7> shevy, thanks, at least now I know that's not ruby-only practice

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15:33 <shevy> yeah I think it originated somewhere in the Unix world

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15:33 <shevy> if someone knows the name for it... :)

15:33 <shevy> I never found out so far (but I also did not research)

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15:34 <KL-7> shevy, http://programmers.stackexchange.com/questions/75349/why-do-nix-y-folks-single-quote-like-this-instead-of-like-this

15:34 <KL-7> looks like it came from latex

15:35 <shevy> cool

15:35 <mtfk> KL-7: http://english.stackexchange.com/questions/17695/any-reference-on-the-usage-of-a-backtick-and-single-quotation-mark-like-this

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15:35 <mtfk> try this one :)

15:36 <MrGando> Hey guys, I'm trying to do a basic delete_if operation but for some reason is working in a weird way for me, could anyone help me a bit ? https://gist.github.com/cce1ff6bf5cca01ccf5d

15:36 <KL-7> mtfk, thanks

15:36 <shevy> hmm different opinions mtfk, I am confused :(

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15:37 <shevy> though I suppose

15:37 <KL-7> shevy, why different?

15:37 <shevy> it's a slight difference between the ` and the ``

15:37 <mtfk> shevy: is the same opinion

15:37 <shevy> KL-7, one mentions tex, but it shows two `` it does not explain the ` does it?

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15:38 <KL-7> as I understand ` and ' were used to distinguish opening and closing quotes in latex

15:38 <KL-7> that's how it came to unix world

15:38 <shevy> hmm

15:38 <KL-7> and the reason behind is expalined in the answer to the question mtfk linked

15:38 <shevy> ok

15:38 <mtfk> yes and this was because encoding in past of computing era

15:38 <mtfk> so not only tex had that thing

15:39 <shevy> "in order to cheaply achieve improved typographic effects on the screen"

15:40 <MrGando> What's the return value of delete_if ?

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15:41 <shevy> I would assume it returns all elements that return true for the block

15:41 <shevy> or vice versa :P

15:41 <MrGando> shevy I would assume that too

15:42 <mtfk> just check it in console :P

15:42 <MrGando> Could you tell me why this work this way ? https://gist.github.com/cce1ff6bf5cca01ccf5d

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15:43 <shevy> MrGando did you output counter?

15:44 <MrGando> shevy yeah, it's in my gist

15:44 <diago> hello, Are general rack questions ok here?

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15:44 <shevy> well MrGando you have a special array

15:44 <apeiros_> MrGando: not the source of your issue, but you shouldn't use #count when you mean #size

15:44 <shevy> I can not reproduce the code on the gist

15:44 <shevy> because you use m.subject and I dont know what that returns. a string?

15:44 <MrGando> shevy really ?

15:46 <shevy> the code works or?

15:46 <shevy> it removes all elements that include "perdida"

15:46 <MrGando> shevy I know it's actually deleting the elements with the word 'perdida' in it, if I 'puts emails.size' I get a 3 after running the delete_if

15:46 <shevy> well that is what it should do right? because 6 elements contain that word

15:47 <shevy> you should be able to negate with a !

15:47 <shevy> ! m.include? ('perdida')

15:47 <shevy> ! m.subject.include? ('perdida')

15:47 <shevy> btw dont put space after the "?"

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15:47 <shevy> or, omit the ()

15:48 <MrGando> shevy so, this emails.delete_if { |m| m.subject.include? ('perdida') }.size is equivalent to emails.size (after applying the delete_if) ?

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15:48 <shevy> sure

15:48 <shevy> you can split up chunks of code blocks if you want to

15:49 <shevy> deleted_emails = emails.delete_if { |m| m.subject.include? ('perdida') }

15:49 <shevy> n_emails = deleted_emails.size

15:49 <shevy> n_emails.should eq 9 #

15:49 <MrGando> shevy that could should output 9 right ?

15:49 <shevy> or with the ! respectively

15:49 <shevy> no of course not

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15:49 <shevy> just look at what m.subject.include? does

15:49 <shevy> it requires if the element includes that word

15:50 <shevy> and if it does, it gets deleted

15:50 <MrGando> shevy thanks for the help mate

15:50 <shevy> and the result of the overall operation gets assigned to deleted_emails

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15:50 <shevy> if you want the alternative, just use the !

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15:50 <shevy> it's just one char :D

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16:00 <diago> I need to setup some default headers for all Rack::Test::Method get, post, delete, put requests

16:00 <diago> Would anyone know how to go about this?

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16:01 <shevy> not me

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16:40 <sefiu> it's possible that some gem author or hacker upload an line to the last gem that "zip all source code and send to an email" to steal the source code and every app using this gem gets affected?

16:41 <robert_> shevy: hiii. :D

16:41 <shevy> hey robert_

16:41 <shevy> still doing boring webstuff? :D

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16:43 <ePirat> Hello, today I've tried to run a git project called Showbot (https://github.com/mutewinter/Showbot) with ubuntu 11.10 and rvm ruby 1.9.3 but i keep getting following error http://pastebin.com/19yXUc0q It worked before with ruby 1.9.2 on ubuntu 10.10 perfectly… anyone has an idea what's happening?

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16:48 <robert_> shevy: I ping-pong around a handful of different projects. :D

16:49 <robert_> I'm doing automagic file importer work right now. :D

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16:55 <shevy> hmm

16:55 <shevy> robert_ I am still rewriting my largest project

16:56 <shevy> 18 .rb files rewritten so far, about 80 more to do

16:56 <robert_> oh boy.

16:57 <robert_> I'm using FSSM to watch my files.. I think.

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17:11 <banseljaj> hi all

17:11 <banseljaj> hi shevy and canton7

17:13 <ePirat> anyone?

17:13 <apeiros_> anyone what?

17:13 <ckrailo> everyone!

17:13 <ePirat> whops wrong window

17:13 <robert_> Does anyone know if FSSM can glob for multiple file extensions in a single path?

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17:14 <rippa> robert_: try it

17:14 <rippa> and tell us

17:15 <rippa> looks like it sure can

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17:30 <plato> hello all

17:31 <plato> question: i put a test.rb file in my lib/ directory, then did require '../dashboard.rb' at the top of test.rb

17:31 <plato> inside dashboard.rb, i have $LOAD_PATH << './lib' ; require 'trustcore'

17:31 <plato> trustcore.rb is located in lib/

17:32 <plato> when i run ruby test.rb, i get a loaderror because dashboard can't find trustcore

17:32 <plato> how should I structure my files and/or requires to fix this?

17:35 <ePirat> how it's posible that the path says ruby1.9.1 when i don't habe ruby 1.9.1 even installed O_O http://dl.dropbox.com/u/45544504/Screenshots/-miqj~o68n_1.png

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17:39 <td123> ruby lib/abi version

17:39 <td123> 1.9.3 also uses 1.9.1

17:39 <td123> ePirat: ruby1.9.1 -v

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17:46 <maxamillion> is there a way to "inspect" an object in ruby from within irb?

17:46 <burgestrand> maxamillion: many ways, depending on what you want to inspect of it

17:47 <rippa> object.inspect

17:47 <maxamillion> burgestrand: I basically just want to see what methods it has, etc.

17:47 <maxamillion> rippa: ah, that would make sense

17:47 <rippa> maxamillion: object.methods

17:47 <maxamillion> also, is there a way to pass functions as first class datatypes? .... I assume I'm missing something

17:47 <maxamillion> rippa: oh ... nice

17:47 <rippa> object.constants

17:47 <canton7> p myobject.methods, also

17:47 <canton7> ah, too late

17:48 <burgestrand> maxamillion: you can create lambda {} and proc {} objects, but you can also retrieve methods by object.method(:methodname); these you can then pass around like you wish

17:48 <rippa> object.instance_variables

17:48 <burgestrand> maxamillion: unfortunately, you can’t call them like regular methods, but they respond to .call

17:48 <maxamillion> burgestrand: hrmm... ok, that's interesting

17:48 * maxamillion is just learning :)

17:49 <maxamillion> rippa: ah, awesome

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17:50 <robacarp> you know...ruby is just damn cool.

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17:50 <burgestrand> maxamillion: if you use pry instead of irb, it helps you with a lot of these inspection things, and also cleans away things you don’t care about

17:50 <maxamillion> burgestrand: oh? I'm not familiar with pry

17:50 <burgestrand> maxamillion: here’s a good starting point: http://pry.github.com/ :)

17:51 <burgestrand> maxamillion: you can use it just like you use IRB, but it also has a bunch of additional features

17:52 <maxamillion> ah, looks kinda like ipython for ruby (I will apologize in advance, I come from a python background and am trying to learn ruby ... my moments of comparison are not in any attempt to start a holy war of languages)

17:53 <johndbritton> I'm using resque to queue calls to a rate limited api. What is the preferred way to stop working when the limit is reached and then start working again after more requests are available

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17:53 <burgestrand> maxamillion: don’t worry, we don’t have many language war idiots in here :)

17:54 <maxamillion> burgestrand: cool, I just felt the need to lay down the disclaimer ... I've been flamed for far less on different topics in other channels before ;)

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17:56 <maxamillion> so .... is there an alternative method to create closures in ruby if you can't pass functions?

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17:57 <sunaku> create closures and pass functions are two very different things

17:57 <yxhuvud> pass a block.

17:58 <maxamillion> sunaku: right, but in languages like javascript they tend to go together

17:58 <sunaku> okay. function(aaa) {bbb} in JS is equivalent to proc{|aaa| bbb } in RB

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17:59 <maxamillion> ah ok

17:59 <maxamillion> cool

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17:59 <johnkpaul> In java, there is the servlet api, in python, there is mod wsgi, is there an equivalent idea in ruby?

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17:59 <sunaku> in both cases, aaa are optional for the caller of the function

17:59 <yxhuvud> maxamillion: the usual way to do it is to pass a block though.

17:59 <johnkpaul> an abstraction layer for web applcations?

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18:00 <yxhuvud> maxamillion: like #each or File.open

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18:00 <maxamillion> ah

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18:00 <sunaku> yes. ruby has a habit of implicit parameters: (1) implicit hash as last parameter, (2) block passed to a method call

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18:02 <sunaku> some_func({callback: function(aaa){bbb}}) in JS would be simplified into some_func do |aaa| bbb end in RB

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18:02 <sunaku> ruby lets you reduce line noise, if you choose to

18:03 <maxamillion> gotchya

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18:04 <maxamillion> just trying to learn

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18:04 <sunaku> it doesn't prevent you from writing JS/Perl/whatever style though. some_func({callback: proc{|aaa| bbb}}) or some_func(callback: proc{|aaa| bbb})

18:05 <sunaku> in the old days, reading the pickaxe was the best way to learn ruby

18:05 <sunaku> there's a newer book by matz himself on ruby 1.9

18:06 <plato> anyone have a recommendation for how I can fix my require problem

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18:06 <maxamillion> sunaku: this one? http://www.amazon.com/Ruby-Programming-Language-David-Flanagan/dp/0596516177

18:06 <sunaku> maxamillion: yes

18:06 <maxamillion> awesome

18:06 <maxamillion> purchasing now

18:07 <maxamillion> thanks, I'm off to hit the books! :)

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18:07 <sunaku> plato: what is the require problem? (how ironic. answering plato by asking him a question)

18:07 <plato> http://codepad.org/sF5tYLYe

18:07 <diago> plato: what was your isses?

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18:07 <yxhuvud> there is always the eloquent guide if you have a mind that appreciates the bizarre.

18:07 <plato> pastebinned from half an hour ago

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18:07 <diago> that should be require_relative if using 1.9

18:07 <sunaku> yxhuvud: you mean poignant guide?

18:07 <yxhuvud> err, yes.

18:08 <yxhuvud> gah, thought of eloquent ruby just before.

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18:08 <sarkis> is the poignant guide better for developers of other languages coming to ruby?

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18:08 <plato> Cool thanks diago

18:08 <shadoi> it's better for entertainment

18:08 <sunaku> well said shadoi!

18:09 <plato> i liked the poignant guide but it doesn't have a good index of where to find topics

18:09 <jlebrech> has anyone used httparty here?

18:09 <yxhuvud> sarkis: it is not a book that you read to get any deep knowledge, though it is pretty good at showing what is possible

18:09 <plato> sarkis: i thought the koans were a really slick way of walking you through ruby syntax and capabilities

18:09 <plato> kinda long though and i dunno if you can do them out of order

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18:12 <Eiam> I have a item.collect thats returning the last line of the collect.. i'd like to return 'nothing' in a specific case.. basically skip

18:13 <Eiam> i don't want to ret urn nil, or an empty array

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18:13 <stenno> 'nil' comes pretty close to nothing :)

18:13 <Eiam> yeah but its still something

18:13 <stenno> no

18:13 <Eiam> and nil.each no worky

18:14 <plato> hey diago, require_relative '../dashboard.rb' still gives me a load error

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18:14 <Eiam> stenno: yes, it is. nil is an object, which is something.

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18:14 <stenno> uhm

18:14 <stenno> so _what_ do you want?

18:14 <rippa> you can't return nothing

18:14 <Eiam> nothing!

18:15 <skipper> Eiam: You must return something.

18:15 <rippa> nil is the closest thing

18:15 <skipper> Eiam: You could return Object.new, if you wanted. >.>

18:15 <dominikh> which would be way worse than returning nil

18:15 <stenno> that would be beside the point

18:15 <stenno> yeah

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18:16 <sunaku> plato: require_relative() doesn't use __FILE__, it uses the Kernel#caller array to determine current file

18:16 <sunaku> it's really a hack IMHO

18:16 <havennn> Eiam: Wrap your nothing.each in a: unless nothing.nil? Would that serve your purpose? nil is the nothing

18:17 <dominikh> the hell?

18:17 <sunaku> havenn: reduce that further: nothing.each if nothing

18:17 <stenno> :|

18:17 <plato> sunaku: well i could probably avoid it by refactoring somehow. i just would prefer to keep my test code in a subdirectory, but still test the functionality of the script in the parent directory

18:17 <stenno> how about just using nil

18:17 <stenno> what is the problem

18:18 <havennn> stenno: was assuming nothing.each do (so the if nothing no worky)

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18:18 <havennn> stenno: Oh, nevermind. You mean after the block?

18:18 <stenno> no

18:18 <stenno> what i mean is

18:18 <Eiam> well, the array isn't nothing

18:18 <Eiam> just a single item in the array would be nothing

18:18 <stenno> o_O"

18:18 <Eiam> so it'll loop 30 times, then item 31 is nil

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18:18 <stenno> whatever

18:18 <sunaku> plato: add your parent directory to LOAD_PATH and just require the parent-dir file normally

18:18 <Eiam> so i just need to remove the nil from the array

18:18 <plato> Eiam: does the array sometimes contain nil as the last object

18:18 <dominikh> Eiam: what are you actually trying to achieve?

18:19 <stenno> what dominikh asked

18:19 <Eiam> compact it is

18:19 <sunaku> Array#compact

18:19 <plato> sunaku: can I do that without absolute paths?

18:19 <stenno> there must be a better solution for that

18:19 <Eiam> dominikh: well, my data source decided to stop returning data when it should be returning data. so until they can fix their data feed, i have to work around them returning nothing

18:19 <Eiam> when the agreement is to return something =)

18:20 <sunaku> plato: if you really want to use absolute paths, try: require File.expand_path('../../some_parent_file.rb', __FILE__)

18:20 <plato> Eiam: array.pop if array[-1].is_a?(NilClass)

18:20 <sarkis> good stuff, ruby koans is nice...

18:20 <plato> maybe?

18:20 <sunaku> plato: beware that absolute paths mostly defeat the purpose of require()

18:20 <Eiam> plato: yeah its not always the last object. just going to try array.compact!

18:20 <sarkis> any other resources recommended for developers?

18:20 <plato> sunaku: i want to avoid them :)

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18:20 <Eiam> and poof, problem worked around for now

18:21 * plato wipes hands on pants

18:21 <sunaku> plato: put your parent code in lib/ and your test code in test/ or spec/ . then ruby -I lib:test:spec test/your_test.rb and inside your_test.rb: require 'your_code' # looks for lib/your_code.rb

18:22 <sunaku> that's the *standard* approach

18:22 <plato> the -I flag specifies folders that require will search in?

18:22 <sunaku> yup. it defines the $LOAD_PATH

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18:23 <plato> OK good enough, thanks!

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18:25 <ph^> Anyone got ruby-opencv working correctly? I'm having trouble loading jpegs

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18:35 <Vejuotas> Hello guys! :)

18:37 <Vejuotas> anybody here?

18:37 <Vejuotas> Really no one?

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18:37 <wmoxam> nooooooboooodddyyyyy

18:38 <Vejuotas> that's funny :)

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18:38 <stenno> easily to amuse as it seems :)

18:38 <Vejuotas> ok, have one question :)

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18:38 <Vejuotas> i am beginner

18:39 <Vejuotas> started in ruby

18:39 <Vejuotas> tutorials

18:39 phantomfakeBNC has joined #ruby

18:39 <Vejuotas> and so on, do i need other interface for coding, like VIMP? :)

18:39 <jesly> Vejuotas: so??

18:39 <stenno> i recommend vim

18:40 <jesly> like vim??

18:40 <Vejuotas> should i use vim for learning in ruby?

18:40 <stenno> you should use irb to learn ruby

18:40 <rippa> or pry

18:40 <shevy> you should use your brain to learn ruby

18:40 <Vejuotas> :D

18:41 <Vejuotas> ok, i'll try :)

18:41 <shevy> vim is very complicated

18:41 <shevy> it takes 50 years to master it

18:41 <stenno> ...

18:41 <stenno> '<shevy> emacs, on the other hand'

18:41 <shevy> stenno here thinks you will master vim in one day

18:41 <shevy> I can't compare an OS to an editor man

18:42 <stenno> sadly, this isn't even a joke

18:42 <shevy> hehe

18:42 <shevy> to be fair, I used emacs only twice

18:42 <shevy> vim for a few years and still use it now and then

18:42 <wmoxam> Vejuotas: only use vim if you are already familiar with it

18:42 <jesly> shevy: which editor u use??

18:42 <banseljaj> hi shevy

18:42 <shevy> jesly bluefish

18:42 <wmoxam> Vejuotas: otherwise you'll be learning an editor AND a language

18:42 <stenno> sublime_text

18:42 <shevy> on my todo list is to continue with my ruby-gtk based editor

18:43 <stenno> D:

18:43 <jesly> shevy: i didnt like bluefish interface

18:43 <jesly> for sublime

18:43 <shevy> but I am lazy and slow :(

18:43 <wmoxam> shevy: Ver is a good editor written in Ruby

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18:43 <shevy> jesly I am using bluefish 1.0.7, I dont like how they changed things in 2.x :(

18:43 <shevy> Ver?

18:43 <wmoxam> shevy: nice nd hackable too

18:43 <shevy> never heard that name before

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18:43 <wmoxam> shevy: gem install ver

18:43 <wmoxam> ver <somefile>

18:43 <wmoxam> :D

18:44 <wmoxam> https://github.com/manveru/ver

18:44 <shevy> oh

18:44 <shevy> manveru :D

18:44 <wmoxam> shevy: just be sure to have Tk installed

18:45 <wmoxam> I've been using it lately for fun. I like it

18:45 <shevy> argh

18:45 <shevy> Tk!

18:45 <stenno> LD

18:45 <stenno> :D*

18:45 <banseljaj> shevy: How good is Tk for ruby GUI development?

18:45 <shevy> every time I tried Tk it was ugly

18:45 <shevy> dunno banseljaj ask someone who likes it. I hate it

18:45 <stenno> i remember Tk when i used it with python

18:45 <Vejuotas> wmoxam: dont wanna learn two things, the first thing (ruby) is complicated enough.

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18:45 <jesly> shevy: is there a beginners irc node for ruby :P

18:45 <banseljaj> shevy: D:

18:45 <wmoxam> Vejuotas: exactly

18:46 <shevy> jesly yeah. #ruby on freenode

18:46 <shevy> :)

18:46 <wmoxam> Vejuotas: so just use the editor you're most familiar with

18:46 * banseljaj suggests redcar for editing ruby

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18:46 <jesly> shevy: am there

18:46 <jesly> :)

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18:47 <banseljaj> shevy: I need to make a gui for the project I showde you, but i can't find a good enough tutorial. :(

18:47 <Vejuotas> wmoxam: have nothing tryied at all, so no familiar editors, except irb

18:48 <wmoxam> Vejuotas: Ruby is your first programming language then?

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18:48 <banseljaj> Vejuotas: If you want a very simple editor, try scite

18:48 <jesly> csherin: you are in here too.. my mentor :)

18:49 <shevy> banseljaj I use ruby-gtk

18:49 <Vejuotas> wmoxam: Exactly! :)

18:49 <shevy> it comes with around 200 .rb files examples if you download the official source

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18:49 <banseljaj> shevy: I can't get ruby-gtk to work on my ubuntu

18:49 <wmoxam> Vejuotas: oh, ok. Then yeah, use something simple liek Scite or gedit or whatever

18:50 <shevy> why not?

18:50 <shevy> you just need the -dev headers

18:50 <banseljaj> I installed it, but it doesn't run

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18:50 <banseljaj> okay, i think i have those

18:50 <shevy> and what does "pkg-config gtk+-2.0 --libs" return

18:50 <diago> plato: sorry I went AFK, u get it sorted out?

18:51 <banseljaj> shevy: nothing. returns nothing.

18:51 <Vejuotas> wmoxam: Thanks, going to tutorials right now, learning is good, practising is better :)

18:51 <banseljaj> I might be doing an ID10T error. :(

18:52 <wmoxam> Vejuotas: :D

18:52 <Progster> Vejuotas: that's what she said

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18:52 <plato> diago: yep! ty

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18:53 <shevy> banseljaj then you do not have the various gtk*.pc files installed

18:53 <banseljaj> Yeah.

18:53 <shevy> banseljaj the idiot error is that ubuntu cripples things

18:53 <banseljaj> Installing

18:53 <ePirat> when trying to run a ruby app i get following error: /home/epirat/.rvm/gems/ruby-1.9.2-head/gems/dm-core-1.2.0/lib/dm-core/associations/relationship.rb:226:in `rescue in parent_model': Cannot find the parent_model Suggestion for Vote in suggestion (NameError)

18:53 <shevy> I dont know how to uncripple it. for .h headers you can usually use aptitude or apt-get

18:54 <shevy> for .pc files, I have no idea

18:54 <banseljaj> so far, i have the ruby-gnome2 package

18:54 <shevy> the official one?

18:54 <shevy> I mean

18:54 <banseljaj> yeah

18:54 <shevy> the source one from the homepage

18:54 <banseljaj> I also have ruby-gnome2-dev

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18:54 <banseljaj> No, I am just using the one from the repository

18:55 <shevy> hmm

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18:55 <shevy> that one I don't know

18:55 <shevy> so I have no idea where the examples will be

18:55 <banseljaj> I'll just pull the latest source and compile myself. :)

18:56 <banseljaj> the ruby-gnome2 package *should* potentially have everything I need, right?

18:56 <shevy> the one from the official webpage from the ruby-gnome2 tarball - yes

18:56 <shevy> but it requires some .h files and so on in order to compile the things

18:56 <shevy> atk, glib, gtk, pango are the four most important ones

18:57 <shevy> you will definitely have the .so libraries, otherwise gtk based programs would not work on ubuntu

18:57 <shevy> but the headers are usually missing and the user has to decripple the system first

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18:57 <shevy> I think with the atk, glib, gtk and pango bindings you can run the hello_world.rb ruby-gtk program

18:58 <shevy> http://pastie.org/3482146

18:59 <shevy> you can associate ALL your ruby code with methods, and GUI things :)

18:59 <banseljaj> shevy: How hard is it, overall?

18:59 <banseljaj> I want a skill i can use later, and GTK is cross-platform and multilingual

18:59 <shevy> well

19:00 <shevy> it is quite easy but

19:00 <shevy> it takes a while to build things

19:00 <shevy> :\

19:00 <shevy> if you just have to finish one App it is ok

19:00 <shevy> if it is a complicated app with lots of different actions, widgets and so on, it's kinda annoying

19:00 <shevy> this also explains why my ruby-gtk based editor is unfinished :/

19:01 <banseljaj> It's a single app. The one i showed you before.

19:01 <shevy> I think it may be easier to have several people work together on big projects, and let them all finish sub-projects that are useful on their own already

19:01 <shevy> yeah, seems very simple

19:01 <banseljaj> I'll build from there, working my way up slowly

19:01 <shevy> remember to make things work first, before making them beautiful

19:01 <shevy> and the less code, the better

19:02 <banseljaj> Understood boss.

19:02 <banseljaj> Also, what bout glade?

19:02 <banseljaj> I can use glade to visualaly generate GUIs, right?

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19:03 <shevy> hehe yeah

19:03 <shevy> some people use that

19:03 <shevy> I could not stand it though so I cant help you much with it

19:03 <shevy> perhaps it works for you, you have to find out

19:03 <shevy> for me it did not work

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19:04 <banseljaj> *nod*

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19:05 <raluxgaza> Hey guys how do I create a method to_string in a class that I can call like this Cat.new("felix").to_string # => "felix"

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19:06 <banseljaj> shevy: I found the package with examples. :D

19:06 <shevy> good!

19:06 <shevy> there is a general example-file

19:06 <shevy> that combines them all together

19:06 <shevy> where you can then just click on a button, and that example loads

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19:06 <shevy> it was somewhere in the gtk*/*sam*/ subfolder I think... in the gtk subfolder

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19:08 <banseljaj> shevy: Also, This will integrate with rvm, right? Because it indtslled system ruby on my system.

19:08 <shevy> raluxgaza, http://pastie.org/3482193

19:08 <shevy> banseljaj no idea, I dont use rvm hehe. BUT, it should work just fine.

19:09 <CacheMoney> I have an array of strings. I want to iterate through each string and compare it to every other string in the array. How can I do this without using a for loop?

19:09 <raluxgaza> shevy: Sweet, thanks buddy.

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19:12 <xkws49er> What does this line of code mean? @messages ||=[]

19:13 <xkws49er> Specifically what does ||= do in Ruby

19:14 <ged> xkws49er: It initializes a variable only if it's nil or false.

19:14 <rippa> CacheMoney: a.each_with_index {|s, i| a[i..-1].each_with_object(s) {|s2, s| p s <=> s2}}

19:14 <xkws49er> ged: I see. Thank you.

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19:16 <CacheMoney> rippa: Thanks!

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19:20 <CacheMoney> rippa: but doesn't that not compare any of the s2's that came before s?

19:20 <rippa> yes

19:20 <rippa> why would you campare them second time?

19:20 <rippa> *o

19:21 <rippa> also, there's an easier way

19:21 <rippa> that I just remembered

19:22 <rippa> a.permutation(2) {|a, b| a <=> b}

19:22 <CacheMoney> let me mess around with that...

19:22 <rippa> this checks twice

19:22 <rippa> #combination checks once

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19:27 <CharlieSu> Is there a way to do a 1liner like this? array << Range.new(1,20).each {|x| "Client#{x}"}

19:27 <audy> CharlieSu: see Enumerable#collect

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19:29 <CharlieSu> audy: thanks bud.. exactly what I needed..

19:29 <apeiros_> CharlieSu: Range.new(1,20) --> 1..20

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19:30 <apeiros_> then: array = (1..20).map { |x| "Client#{x}" }

19:30 <apeiros_> also - it was a 1-liner to begin with…

19:30 <Vejuotas> Tryied Scite, some youtube russian guy shows tutorial, everything fine, thanks for answering :)

19:31 <diago> Anyone have any advice for getting sessions working from within tests?

19:31 <rippa> hey guys

19:31 <rippa> look

19:31 <rippa> a = % %s % % foo ;

19:31 <rippa> cool, no?

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19:31 <shevy> perl!

19:31 <diago> to test flash messages

19:32 <apeiros_> rippa: gett'n old, bt yes, fun obfuscation

19:33 <CharlieSu> apeiros_: yeah i just needed that collect.. thanks..

19:33 <CharlieSu> apeiros_: i had a brain fart

19:33 <apeiros_> s/collect/map/ - instant code beauty improvement :-p

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19:34 <apeiros_> rippa: !!?!???:!??

19:34 <rippa> that's cool too

19:34 <rippa> gives two warnings though

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19:36 <shevy> man

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19:48 <lectrick> I've got a new Lion install and a new Xcode 4.2 install from the App Store and I'm having gcc/clang/etc type issues with building RVM, MySQL and rubies via RVM. Any tips?

19:49 macmartine has joined #ruby

19:49 <lectrick> I installed XCode 4.2 via the App Store and manually installed the dev tools via Prefs > Downloads within Xcode.

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20:04 <mischko> I'm brand new to ruby and having to modify some code. I'm a python developer. Someone please explain this syntax for a has to determine if it has a key: if !params.has_key?(:results) Why the colon and not quotes around 'results'?

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20:05 <mischko> for a hash

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20:07 <plato> i'm concerned that my exception handling code might itself raise an error

20:08 <plato> can i nest begin..rescue..end blocks inside each other?

20:08 <canton7> mischko, rube makes the distinction between symbols and strings. They're kind of alike, but symbols are more suited to use as keys, etc

20:08 <canton7> mischko, symbols start with a colon, eg :my_variable

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20:09 <mischko> canton7, thanks. I'll keep tinkering.

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20:31 <atmosx> hello

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20:32 <atmosx> anyone has experience with heroku? What can I do for free? I have a script. If I write a sinatra interface, can I run it on heroku for free?

20:32 <la_pedycti> atmosx: Hi

20:32 <atmosx> it's just one task (theoritically speaking)

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20:40 <wefawa> Is assignation a method call? is if a method call?

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20:41 <ryannielson> wedawa? Assiging is a method call yes

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20:42 <ryannielson> wedawa: I believe if is a language construct

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20:43 <ryannielson> atmosx: Yes, you can push a simple app to heroku for free. Visit their site and it lists out what is offered. For something simple, it should have more than enough

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20:46 <igel> in the following, the argument to pack is wrong. ["ff884220"].pack("H").unpack("H").should == "ff884220"

20:46 <igel> what am i doing wrong?

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20:47 <scientes> how do i get the BYTE length of a string?

20:47 <gate> igel: ["ff884220"].pack("H*").unpack("H*")

20:48 <scientes> in 1.9

20:48 <igel> gate: ah, thanks! :)

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20:48 <sunaku> scientes: String#bytesize

20:48 <zaargy> i'm using rvm to manage my ruby versions. i installed ruby 1.9.2 and did rvm use 1.9.2. i then tried to install rspec version 1.2.1. with gem install rspec -v 1.2.1 but it seems to install version 2.8.0. what gives?

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20:49 <sunaku> zaargy: try asking in #rvm

20:49 <wefawa> <ryannielson> wedawa? Assiging is a method call yes ---> who's the receiver?

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20:50 <zaargy> sunaku: okay, thanks

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20:56 <CoverSli1e> when the pantsman's testifyin', the shirtless man believes

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20:58 <tshirtman> CoverSli1e: wut? heretic!

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20:59 <wefawa> <ryannielson> wedawa? Assiging is a method call yes ---> who's the receiver?

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21:07 <xkws49er> how do you set up a function to be memoized?

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21:07 <madhatter> Good evening. Can somebody help me with the twitter gem? I have some issues to understand the returned result. I would like to fake it for a rspec stub.

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21:11 <atmosx> is there any gem that can be used to find the RSS feed (if any) of a specific url?

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21:13 <canton7> atmosx, nokogiri, or even regex (probably just about ok for parsing ok a single tag)

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21:14 <atmosx> canton7: hmm you mean by searching through the html source?

21:14 <canton7> look for <link rel="alternate" type="application/rss+xml" title="Title" href="http://whatever" />

21:14 <canton7> ...with the properties in any order, of course

21:14 <sungji> Is there another way for sorting the letters of a word than processing it with each_char and a tmp array?

21:15 <canton7> sungji, you could use .split(''), but that returns an array instead of an enumerator, so your'e probably best off with "hello".each_char.sort.join

21:16 <atmosx> canton7: thanks for th hint.

21:17 <sungji> canton7, mhm ok. thanks for your time

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21:19 <luckyruby> is there something similar to ||= but applies also if left hand side is empty?

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21:20 <luckyruby> I guess foo = 'bar' if foo.blank? isn't too bad.

21:20 <canton7> var = blah if blah.empty? || !blah maybe?

21:20 <canton7> yeah

21:20 <canton7> oops, s/blah/var for most of those

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21:21 <Mon_Ouie> Do you mean empty or if it's nil/false?

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21:24 <gate> luckyruby: var = value if var.blank?

21:24 <bradhe> erm, this is a total noob question. I'd like to pass a block as a callback to a handler (on_body on a Curl::Easy obj from Curb). How would I do that?? do I need to yield it? I'm using 1.9.3.

21:25 <heftig> Proc.new { ... } gets you a object to pass

21:25 <heftig> or proc { ... }

21:25 <heftig> or lambda { ... } for something more method-like

21:26 <bradhe> so I'd need to do, say curl_request.on_body { |data| Proc.new { blk.call(data) } }?

21:26 <bradhe> basically wrap it in a proc?

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21:27 <canton7> bradhe, what's wrong with just curl_request.on_body{ |body_data| your code to process body_data goes here } ?

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21:28 <bradhe> canton7: a bunch of legacy code doesn't pass a block, and body data is collected and parsed elsewhere in that case.

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21:29 <canton7> badabim, on_body{ |body_data| my_fancy_function(body_data) } ?

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21:31 <canton7> bradhe, ^^

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21:34 <tsd_usa> Hi just to confirm: Is "." included in load_path in Ruby 1.9???

21:34 <tsd_usa> I tried to run a rb file, but always get a "can not load such file" error

21:35 <tsd_usa> only in ruby 1.9

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21:35 <gate> tsd_usa: no, I think they removed it

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21:35 <gate> tsd_usa: I believe that there is a require_relative, and you can add it to your load path

21:35 <tsd_usa> So every time I run the file I must run it with option -I. ???

21:36 <gate> you can alter the script to overcome that

21:36 <gate> tsd_usa: http://stackoverflow.com/questions/2900370/why-does-ruby-1-9-2-remove-from-load-path-and-whats-the-alternative

21:36 <tsd_usa> gate: Thank you, I will try

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21:45 <Zolrath> Anyone have any idea why tork wouldn't be reabsorbing any changes to my code?

21:45 <scientes> require './filename'

21:45 <scientes> i like that

21:46 <Mon_Ouie> Except that's wrong

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21:46 <Zolrath> It detects that the code has changed and runs the associated test, but it runs the test against a cached version of the code

21:46 <Mon_Ouie> It depends on what's the working directory at the moment of the call to require

21:46 <Mon_Ouie> Not on where the file is located

21:47 <Mon_Ouie> (which is why . isn't part of $LOAD_PATH anymore)

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21:50 <moshef> how do I sort a hash that look something like {key=>{some_key=>some_value}, key2=>{some_key2=>some_value2}} ? want to sort based on some_value

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21:50 <moshef> and i don't want to turn this into an array

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21:50 <Boohbah> h.sort_by { |k,v| v }

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21:51 <Boohbah> http://ruby-doc.org/core-1.9.3/Enumerable.html#method-i-sort_by

21:51 <lectrick> So... Sublime Text 2 text editor is wooing me away from Textmate!

21:51 <moshef> tried that, but then I'm getting an array

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21:52 <Zolrath> sunaku: I assume I'm not supposed to have to manually trigger reabsorb overhead files every time I change anything that isn't a _spec.rb file?

21:52 <Mon_Ouie> Yes, sort_by always returns an array

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21:52 <moshef> i want to keep it a hash

21:52 <Mon_Ouie> You can use Hash.[]

21:52 <moshef> it means i will have to convert it back?

21:53 <moshef> Hash.[] ?

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21:53 <Mon_Ouie> although relying on order when using a hash table doesn't sound like such a good idea

21:53 <moshef> well

21:53 <Mon_Ouie> Hash[array]

21:53 <moshef> I'm pulling some info

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21:54 <moshef> and i need it to be in a specific order

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21:56 <shevy> moshef sounds as if you want to keep it in array then

21:56 <shevy> the array counts at 0 1 2 3 4 5 6 7

21:56 <moshef> well i made some data structure using a hash that is quite complex

21:57 <shevy> the has contains other hashes and arrays?

21:57 <shevy> *hash

21:57 <moshef> i don't want to start making the adjustments in the view to fit as array

21:57 <moshef> yeah

21:57 <shevy> hmm

21:57 <moshef> just hashes

21:57 <moshef> key being some object and value being another object

21:57 <moshef> and then in the view i combine both

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21:58 <moshef> don't get why the new items added to the hash are not in the end of it

21:58 <moshef> since i do start with the items in the order i want

21:58 <Mon_Ouie> When you have many nested structures, you usually should consider creating a class

21:58 <moshef> but when i finish adding them all, the order is messed up

21:59 <moshef> i wouldn't go as far as that. its not that complicated

21:59 <moshef> just a bit tricket..

21:59 <moshef> trickey*

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21:59 <moshef> how about orderings it by it's keys?

22:00 <Mon_Ouie> Creating a class isn't an extreme solution in an object oriented language

22:01 <moshef> i don't think its extreme, i just don't see how i will go about it with a class

22:02 <moshef> it could very well be what i need when i think about it

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22:43 <Russell^^> if i have a BigDecimal object that prints out the value 1000.0 when I do .to_s('F'), is there a way to trim off the decimal place so it just returns 1000?

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22:44 <Russell^^> aha, there's a to_i method

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23:13 <CacheMoney> I'm writing a script and I've written a module in a seperate file -- both in the same folder. I want to use that module in my current script, how do I do this? I tried require 'file_name.rb' but I'm getting an error: "no such file to load".

23:14 <jergason> CacheMoney: try `require './file_name'`

23:14 <jergason> what version of Ruby are you on

23:14 <jergason> ?

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23:15 <atmosx> CacheMoney: worked for me. There's a gem though that handles this... much better than you ever will.

23:15 <CacheMoney> jergason: v 1.9.2p290. I tried that too, although I got an error message this time: "undefined local variable or method"

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23:15 <Zolrath> require_relative 'filename'

23:16 <jergason> CacheMoney: that might be an error in your module then

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23:16 <jnh> Anyone here familiar with Treetop?

23:16 <jergason> if it can't find the file to require, it will yell at you about that

23:16 <atmosx> CacheMoney: https://github.com/jarmo/require_all

23:16 <CacheMoney> Zolrath: error message stated: "undefined local variable or method"

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23:17 <CacheMoney> jergason: I was using this module in the irb just a second ago. I'm working through the Learn Ruby the Hard Way lessons 25 and 26

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23:17 <Zolrath> jergason is right, that doesn't sound like a require error

23:18 <CacheMoney> Zolrath: you're right. WHen I used require_relative it worked, however, I didn't call the module by the correct name

23:18 <CacheMoney> Thanks for the help

23:18 <CacheMoney> jergason: thanks for the help as well

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23:47 <CacheMoney> A new Anonymous video is out http://news.ycombinator.com/item?id=3645610

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23:56 <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

23:57 <axl_> if i have a string and a regular expression

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23:57 <axl_> what operator do i use to check if the regular expression matches the string?

23:57 <axl_> (ie all of the string an not parts of it)

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23:57 <td123> CacheMoney: calling war against the US government.. this is going to be fun to watch...

23:57 <axl_> !~ is the exact opposite of what i want

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23:58 <CacheMoney> td123: just what the US needs... another war

23:59 <undersc0re> oh my

23:59 <undersc0re> politics in a programming language channel

23:59 <undersc0re> fun!

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