fflush changed the topic of #ruby to: Ruby 1.9.3-p194: http://ruby-lang.org || Paste > 3 lines of text on pastebin.com
<shevy>
this seems to create a proper directory in ruby SITE DIR
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<shevy>
mkdir -p lib/ruby/site_ruby/1.9.1/bar
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<shevy>
so now when I go there... the project bar/ has a directory
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<shevy>
but only for the .rb files hmmmm
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<shevy>
you said some people put it inside lib/
<shevy>
ah nevermind
<shevy>
I am going to do that too, seems simplest
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<n_blownapart>
hi I know this is not a match, but is there a misprint here in the first char class, ie. there should be a second bracket around a-w ? thanks: /[a-w&&[^c-g]z/.match("e")
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<n_blownapart>
^^ the error message is premature end of char-class
<fowl>
yea your missing a bracket there
<n_blownapart>
fowl thanks its a misprint then. I thought somehow the two char-classes were combined and I had something else wrong. thanks fowl, varreli
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<n_blownapart>
fowl you on?
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<n_blownapart>
actually fowl the missing bracket was after the z. a-w doesn't take the closing bracket so now I don't understand why z is not included in the match criteria: /[a-w&&[^c-g]z]/.match("e")
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<n_blownapart>
^^ i.e. this returns nil : /[a-w&&[^c-g]z]/.match("z")
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<Banistergalaxy>
Fowl I want to pair with u
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<rking>
>=(
<fowl>
n_blownapart: play around with it on rubular.com
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<n_blownapart>
the book says to read z as "OR". that's what I don't get. fowl et al ^^
<fowl>
n_blownapart: /[a-wz&&[^c-g]]/
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<n_blownapart>
^^ correction read it like this : ([a-w] AND ([^c-g] OR z))
<fowl>
oh
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<fowl>
what book is this
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<fowl>
rubular says [abc]A single character of: a, b or c
<rking>
Somewhat of a small thing to optimize, but then again '&&' makes no sense in a character class, so you've got some free room for features.
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<n_blownapart>
rking I'm a noob. what do you mean a small thing to optimize?
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<fowl>
n_blownapart: that only seems to work with characters that are in the first one, because it has to be AND'd in
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<rking>
n_blownapart: I mean that all you're doing is constructing a list of single chars. It's something you could often specify without && and it'd be decently terse. Though, I think if you threw in Unicode problems it would get more useful.
<fowl>
this for example /[1-7&&[^5-8]6]/ will select six because it was in the first one (6 and 6) change the last char to 9 though and it will look for (9 and 9) but since the first one fails it wont match the 9
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<fowl>
try it on rubular.com with 01234567890 as the test string and play around with the last character
<fowl>
(in the regex)
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<n_blownapart>
but the intersection of the sets would be on either side of the && , right?
<n_blownapart>
fowl rking
<n_blownapart>
^^
<n_blownapart>
meaning the two sets would be on either side.
<fowl>
you're thinking of ||
<fowl>
i think
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<fowl>
z does nothing on that side of the && because 'z' doesnt get past first condition a-w, i think they just put it there to show that the normal order is OR
<n_blownapart>
banisterfiend: hey I'm still having trouble with this : /[a-w&&[^c-g]z]/ #read like this: ([a-w] AND ([^c-g] OR z))
<n_blownapart>
banisterfiend: ^^ why would z be included in the outermost brackets?
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<n_blownapart>
the notation ]z] is to be read OR z ....? banisterfiend
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<n_blownapart>
i.e I would think that z would be included in the match. ^^
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<n_blownapart>
I see that && does not include z, but why would the notation be that way....
<n_blownapart>
correction a-w ^^
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<iamjarvo>
so if i have this http://pastie.org/private/gio3tmxbobqtxsdedb8cha and thats all that class does. is there any reason to test that? and if there is a reason to test what would I test?
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<banisterfiend>
n_blownapart: can u tell me more about the presentation at berkeley? :P
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<n_blownapart>
banisterfiend: there were about say 25 people attending. I don't remember the guys name who gave the talk but there was attentive interest.
<banisterfiend>
n_blownapart: did things go smoothly? or were there bugs/problems?
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<n_blownapart>
banisterfiend: from what I recall it went smoothly. more of an overview of features. people installed the gem and tinkered with pry. I took handwritten notes...the ones I sent you.
<n_blownapart>
banisterfiend: I am still vague about what it does, but I think there was a lot of discussion about debugging.
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<n_blownapart>
I don't understand how rubular works, because z and a return a match with this regex: /[a-w&&[^c-g]z]/
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<ryanf>
oh cool, I was wondering about that
<ryanf>
n_blownapart: cirwin and I talked about going but then forgot
<ryanf>
of course
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<n_blownapart>
ryanf you in SF area? cirwin? I can't remember much either...
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<banisterfiend>
rking: what's the diff b/w pry_eval and mock_pry ?
<banisterfiend>
they look kind of the same
<rking>
banisterfiend: That's what ryanf is teaching me, though I don't fully get it.
<banisterfiend>
ryanf: there's one thing i have against the push based thingy, and that's that it skips a lot of the read stuff, like before_read / after_read hooks etc
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<banisterfiend>
also it's kind of clean that all pry input comes from teh same place (an input object), rather than kind of forced directly into pry & skipping the input object
<ryanf>
yeah, it's kind of a trade-off. the inconsistency with real life would be temporary though, since the theory is making the real io work the same way. at which point hooks would have to be consistent one way or another
<ryanf>
this isn't #pry btw ;)
<banisterfiend>
oh
<banisterfiend>
good point
<n_blownapart>
http://pastie.org/4392189 -- this code and description is baffling me: if && performs an intersection of sets, why is z excluded as a match?
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<ryanf>
n_blownapart: yes, we both live in the bay area
<fowl>
n_blownapart: because false && (true or true) is still false
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<fowl>
most of the time you dont use && in character sets
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<n_blownapart>
fowl that makes sense, read as a normal operand, but the description says it works as an intersection of sets, which would include z, wouldn't it?
<ryanf>
no
<ryanf>
you may be thinking of union
<ryanf>
intersection = only common elements
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<n_blownapart>
ryanf bingo. thanks, I was tripping
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<n_blownapart>
I was thinking union ryanf
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<Axsuul>
it appears that Array#map seems to auto-sort my values? How do I turn this off/?
<ryanf>
no
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<n_blownapart>
how does (..) symbolize "at" in this regex? : /[csh](..) [csh]\1 in/.match("The cat sat in the hat")
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<bperry>
n_blownapart: .. is two arbitrary characters
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<bperry>
it would also match "by" and "so"
<bperry>
almost that whoel sound of music song as well
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<bperry>
so that regex itself would match any word that started with c, s, or h
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<bperry>
the followed by two arbitrary characters
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<bperry>
car cow saw sax how hax
<n_blownapart>
bperry: but ... would not be a match because the words beginning with csh are all three letter words, right?
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<bperry>
I don't get the question
<bperry>
it would match four letter words yes
<bperry>
that start with c, s or h
<n_blownapart>
if it were (...) it would .....ok thanks. got it. I'm a noob. bperry question to follow...
<bperry>
no worries
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<n_blownapart>
in what case would you use such a regex? it seems so roundabout to type [csh](..) bperry
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<bperry>
regular expressions are awesome, they are very handy
<bperry>
that regex itself isn't useful
<bperry>
but knowing how it works allows you to create your own
<bperry>
so you can match patterns of text easily
<bperry>
and they are useful outside of ruby as well
<bperry>
the most common are PCREs, or perl compatible regular expressions
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<n_blownapart>
bperry: I was having trouble with. why would you write a regex like the following, to search for a set of letters expressed as the intersection of two sets? : /[a-w&&[^c-g]z]/
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<bperry>
that sounds like a homework problem :)
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<n_blownapart>
yes it does !
<n_blownapart>
but why would I ever search with two sets intersecting to give me my criteria?
<n_blownapart>
bperry: ^^
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<bperry>
in case you want to find where two words share a pattern
<bperry>
or two strings, that is probbably the more correct answer
<ryanf>
n_blownapart: it could be an easy way to do exclusion
<ryanf>
like that example is a bit implausible
<ryanf>
but what about /[a-z&&[^c-g]]/
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<Spaceghostc2c>
rking: Sorry for disappearing.
<Spaceghostc2c>
I have to make dinner.
<n_blownapart>
ryanf: bperry thanks. /[a-w&&[^c-g]z]/ was baffling because z was stuck on the end to be read as "OR z." in this case && can't really be read as "AND" because that english syntax would not really describe an intersection of two sets, because otherwise z would be included. right?
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<ryanf>
no, set intersection always means just the element they have in common
<ryanf>
"and" is slightly unintuitive since "and" can also mean "all of the inputs together", but in this case it means each element has to be in one set AND the other I guess
<n_blownapart>
ryanf: I agree that is interesting.
<n_blownapart>
ryanf: thanks
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<lledet>
is there a gem to connect to web sockets?
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<AnarchoTroll>
Guys, I am trying to build a C extension and I am having trouble setting up extconf.rb . Can anyone here help me?
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<{aaron}>
is there a way to reopen a class and override the initializer but be able to call the original (without aliasing it)?
<banisterfiend>
{aaron}: Yeah
<banisterfiend>
{aaron}: class Bing; old = instance_method(:initialize); define_method(:initialize) { old.bind(self).call }
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<{aaron}>
ok thanks
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<epitron>
holy shit... that's so hax
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<{aaron}>
i was thinking it might be possible via module inclusion, perhaps i could grab the original method from the passed base in that case
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<banisterfiend>
{aaron}: it depends what u r trying to do
<banisterfiend>
{aaron}: u never said anything about module inclusion to me ;)
<banisterfiend>
deryl: well, he might have whispered to someone in secret
<banisterfiend>
we dont know for sure, what this man does behind closed doors
<deryl>
same as the man behind the curtain!
<deryl>
we ignore him too! The Wizard said to!
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<{aaron}>
banisterfiend, just trying to do whatever is cleanest. i'm reopening and overriding initialize to set a member field. i could easily do it via subclassing but for other reasons in this codebase that's possible
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<rking>
Spaceghostc2c: It's cool. We'll catch up again.
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<AnarchoTroll>
When using mkmf to generate a makefile, I would like to include another folder that contains source code. This folder has both headers and files. Do you know how to do this?
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<snevq>
3/quit
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<O_>
Hi. Anyone know if there is a way to convert a bignum (very large unsigned integer) into a String with the same information?
<O_>
esoteric quesiton I know...
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<Hanmac>
bignum.to_s ?
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<O_>
what i mean is not like to_s. but packed so for example 256 would become "\xFF"
<Hanmac>
maybe: Marshal.dump(bignum)
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<savage->
[bignum].pack('C*')
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<O_>
Hanmac: Hmm. thanks. Interesting approach. Looks like I might have to strip the front off and reverse it but otherwise it might just work....
<O_>
savage-, : That's only going to give me a one character string though isn't it, even if my bignum is huge?
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<Hanmac>
hm better? [bignum].pack("Q*")
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<O_>
Hanmac: only works if the number I am using is 64-bits or less
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<fowl>
how many bits do you need? o.o
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<O_>
fowl, : more. I can explain if you want... but its just something I'm being forced into by other libraries...
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<shevy>
got a question
<shevy>
I wanna remove a directory, but only if it exists
<shevy>
now I am using FileUtils.rm_rf(d) for this, however
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<shevy>
I looked at old code, and I seem to be using two different checks for it
<shevy>
(1) if File.exist?(directory)
<shevy>
(2) if File.directory?(directory)
<shevy>
now I am confused
<s1n4>
shevy: Dir.exist?('x')
<shevy>
hmmmmmm
<shevy>
now I have three ways
<shevy>
:D
<s1n4>
:D
<s1n4>
shevy: FileUtils.rm_rf(d) if Dir.exist?(d)
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<shevy>
I need to reason for my poor brain
<s1n4>
:D
<shevy>
am I right that, if I use File.directory?, I also implicitely use Dir.exist? too already?
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<shevy>
because it can only possibly be a directory if it exists before the time we check
<shevy>
if it does not exist at all, it can not be much at all
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<shevy>
I am awake since only ~15 minutes, my brain is not yet awake...
<s1n4>
shevy: I dont understand what you want to do
<s1n4>
shevy: if you just want to remove a dir if that exists, well you do it like: FileUtils.rm_rf(d) if Dir.exist?(d)
<shevy>
just remove a directory in case it exists (and is a directory). and ideally use only one way consistently for the rest of my life
<shevy>
yeah, you added a third way hmmm :(
<s1n4>
shevy: simplest way to check a dir if exists is to use Dir.exist?
<shevy>
alright, I will use that
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<s1n4>
thank god
<faen>
what would you want to do if d was a file?
<shevy>
depends actually. I have a general remove() method, that removes anything that is thrown at it. but sometimes in that project, I just want to remove a directory, and if for some reason I'd ever put in a file to it, when I explicitely called that method, it should not remove it
<shevy>
(the methods are bundled within remove() )
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<faen>
so I guess that already rules out File.exist? ?
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<shevy>
I dunno, but I think Dir.exist? makes more sense
<shevy>
what I was wondering most was, when to use File.directory? now, if Dir.exist? also exists
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<shevy>
right now, both files require the same module, and also have one method that makes use of that module
<Hanmac>
and? where is the problem?
<shevy>
what I am wondering is, what is the proper way to require that module? can I uncomment the require module part of foo1.rb, because foo2.rb requires that module already?
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<shevy>
or should both .rb files continue to require that module
<shevy>
I could get rid of one line in foo1.rb :D
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<shevy>
test
<s1n4>
shevy: and I have a qeustion, let me ask you
<s1n4>
shevy: do you know what do you want to do ?
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<shevy>
s1n4 yeah
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<shevy>
by and large
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<Hanmac>
when A requires B, and both A and B requires C, then you dont need an require C in A
<shevy>
I strive for beauty, simplicity and consistency whenever that is possible
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<shevy>
hmm ok Hanmac
<shevy>
there goes that require line!
<Hanmac>
its not needed, but you could still add it
<s1n4>
shevy: first think then ask :)
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<atmosx>
hello
<atmosx>
any good test on how to perform 'Testing'
<atmosx>
I don't understand the mindset behind it… I mean if I write my own tests, how the heck will this help me?
<shevy>
atmosx, I think that depends on the tests
<shevy>
you can try to ensure consistency and correct output of your methods in a reliable way
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<atmosx>
shevy: okay, I'll read the chapter on the book and see with what code can I come with...
<O_>
mneorr: I've come across weird problems with sublime text launching ruby too. Safest way is to use if for editing, and command line to actually run things...
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<O_>
*'if' shuould be 'it'
<Hanmac>
mneorr whats your os? maybe i found a better editor for you+
<vectorshelve>
shevy: game of life is a famous problem in mathematics. I need to code it in ruby. bt for that first I need to understand it :)
<shevy>
aha
<shevy>
odd name to give a mathematical problem, sounds like a biological problem :P
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<mneorr>
Hanmac: OSX ML
<mneorr>
O_: yeah, I use it that way
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<mneorr>
O_: but it breaks when editing text :D
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<O_>
mneorr: Oh. never had it break whist actually editing...
<O_>
that sounds pretty bad...
<mneorr>
that's crazy enough :D
<mneorr>
it may be possible that some plugins have broke it, like RubyMotion builder
<mneorr>
I've deleted those but still..
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<Hanmac>
rubymotion? you did buy that shit?
<mneorr>
Hanmac: i'm an iOS native dev
* Hanmac
feels sorry for you :D
<mneorr>
so I did buy it to support the guy, and to hack a bit
<banisterfiend>
Hanmac: what's shit about it?
<mneorr>
Hanmac: as long as it brings lots of money with not much of effort, you can feel sorry as much as you want ;)
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<Hanmac>
i can make 3d games with ruby without needing anything to pay
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<banisterfiend>
Hanmac: iOS isn't limited to writing 3D games..u know that right? :)
<mneorr>
Hanmac: you can make them in any environment you're most comfortable with
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<banisterfiend>
Hanmac: let's see you invest the time an effort to develop a ruby implementation that compiles down to bytecode and runs on iOS...for free :)
<banisterfiend>
no one would do it, and certainly not with the degree of polish in rubymotion
<banisterfiend>
it's just too much work to do for free
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<banisterfiend>
Hanmac: also, the creator of rubymotion has already done HUGE amounts of opensource, he doesn't owe anyone anyone any more free shit.
<banisterfiend>
macruby is entirely opensource for example
<Hanmac>
rubymotion does not support my gems so i am not interested
<banisterfiend>
fair enough
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<mneorr>
Hanmac: is there any other implementation where you can use the classic gems and compile / run on the iOS?
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<mneorr>
i'm open minded for any other sane solution that can make the life easier. The only difference is that I don't mind paying 150$ for such a thing
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<banisterfiend>
mneorr: you primarily do objc?
<mneorr>
banisterfiend: yeah
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<mneorr>
but i'm also trying to pick up the sugar from some other langs and implementations :)
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<shevy>
hate !!!
<shevy>
one terse sentence must suffice!
<shevy>
wikipedia is like kids babbling
<apeiros_>
try simple english edition
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<visof>
Hello
<visof>
Is there anyone using aws with ruby here or kno which channel to discuss this
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<shevy>
what is aws
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<kn330>
Amazon Web Services I suppose
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<visof>
Hello what is the channel for aws ruby
<mneorr>
visof: probably that's a very specific topic,. maybe you want a general AWS or try with the concrete question here
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<visof>
Mneorr I lost private and public key for amazon instance is there a way to get access again
<mneorr>
visof: i think you need to log in on their site, right-click on the running instance and 'Connect'
<mneorr>
you'll need to download the key pair and you should be on the way
<mneorr>
(but this wasn't a ruby question at all :D )
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<visof>
Mneorr around
<mneorr>
yeag
<mneorr>
yeah*
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<visof>
Did you mean to download key pair for the instance
<mneorr>
visof: yes
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<visof>
How
<visof>
Tell me even with pseudo code
<mneorr>
it's not a code
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<mneorr>
go to the amazon's website, log in as a user and that's it
<visof>
Mneorr no I want to do that in hard code
<mneorr>
okay, but how can you add anything in the code when you've lost the .pem ?
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<visof>
I meant keys the make me access the instance via ssh
<visof>
I have the authentication info to use SDK
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<mneorr>
and you're able to access the instance from the terminal
<mneorr>
?
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<visof>
I created instance and make ssh keys to can access the instance from my machine but my machine is formated and I installed new one but I need private and public keys to can acces the instance from this new machine
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<mneorr>
visof: you can't hard code the keys. you have to download them from the website. once you're able to SSH from the terminal , you can start coding
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<vectorshelve>
any idea on what would be the best way to go about implementing game of life in ruby ?>
<vectorshelve>
so I would rather read input from a file and make user specify the pattern in the command line as argc
<vectorshelve>
argument*
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<apeiros_>
then do it
<apeiros_>
or are you waiting again for somebody of us coming up with the code and giving it to you?
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<vectorshelve>
apeiros_: where to store the input and what would be a better way of implenting it as a suggestion is welcome
<apeiros_>
vectorshelve: how about for once, just once, you come up with a solution yourself and ask for improvements after that?
<vectorshelve>
apeiros_: ok
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<ethicalhack3r>
Hi, I was wondering if anyone could help me loop through an array endlessly. When the array runs out of values, it starts again from the beginning or end. Here is the small script I have written in which I need to solve the problem. http://pastie.org/4394183
<apeiros_>
ethicalhack3r: Array#cycle
<ethicalhack3r>
apeiros_ damn that was quick! I'll give that a try, thanks! :D
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<apeiros_>
yw :)
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<Hanmac>
shevy lets develop an language with ordersentive words ...
<Hanmac>
maybe you have the chars for Gate and for Man, if you read it [Man][Gate] its a Guard but when you read it [Gate][Man] its an Prisioner ...
<Hanmac>
and then some kind of magic chars like "rotate the reading 90° clockwards"
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<ohcibi>
can someone explain me how to interpret class Klassname < Parent(Otherclass) ? i'm curious about the Parent(Otherclass) part
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<Hanmac>
ohcibi Parent is a method that returns a class object
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<ohcibi>
Hanmac: hm k...
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<Hanmac>
ohcibi its creates an anonymous class for some reason
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<ohcibi>
Hanmac: hm its kind of a work in progress example, i think i'll understand more if i just move on with it 8-))
<apeiros_>
doesn't need to be anonymous
<Hanmac>
no but it can be anonymous
<apeiros_>
yes
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<kn330>
{"sky"=>["sunny", "rainy"], "temp"=>["warm", "warm"]} | I need the 'value' Arrays to be unique. How do I got about it?
<Hanmac>
kn330. hash.values.each(&:uniq!)
<apeiros_>
you iterate over the hash and use Array#uniq!
<kn330>
Hanmac: please do care explain the {lo,ma}gic!
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<apeiros_>
o0
<apeiros_>
and there I thought that code was self-explaining
<kn330>
I've never used `&` in ruby! (forgive my n00bness if you will) :)
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<Hanmac>
.each_value(&:uniq!) is the same as .each_value{|o| o.uniq}
<Hanmac>
(ok mostly the same)
<Hanmac>
damit i forgot the ! again
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<kn330>
Hanmac: thanks
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<Tulak>
hello, i have some script that have to process some data, but it is too long to finish, even if it runs at 100% cpu. I have QuadCore cpu with 8 threads i want to use the power of my cpu. How can i divide the script to run in parallel processes ?
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<seanstickle>
Tulak: buy 20 machines
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<seanstickle>
Tulak: run the script on each machine
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<Tulak>
maybe you dont understand me, my cpu runs at 100% but only one core, i want to use more cores. I can do it when i open several rails consoles, but I hope it can be done with some fork method or something
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<gogiel>
Tulak: run as many processes as you want. there's classic IPC in ruby
<gogiel>
or DRb
<gogiel>
but never tried it
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<fourlastor>
hello everyone :)
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<fourlastor>
with gosu, is there a better way to capture user input instead of putting tons of ifs in the main loop (as shown here: https://github.com/jlnr/gosu/wiki/Ruby-Tutorial chapter 2.2)?
<fourlastor>
something more event driven would be the best
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<Spooner>
fourlastor : Consider asking Gosu questions in #gosu
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<fourlastor>
Spooner, ok
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<crazed>
when using activerecord, anyone know if there's a method to "unpluralize" something?
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<crazed>
nvm
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<shevy>
gzys
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<shevy>
I mean
<shevy>
guys
<shevy>
I used to do this for a while:
<shevy>
T = true
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<shevy>
F = false
<shevy>
but now I have reached the point where I think using T and F is ugly
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<shevy>
@foo = T
<shevy>
@bla = F
<shevy>
@foo = true
<shevy>
@bla = false
<shevy>
^^^ second is much nicer to read
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<seanstickle>
shevy: you were misled by your love for Scheme
<shevy>
scheme
<shevy>
isn't that (lisp) abomination?
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<shevy>
I rather die than use those (foo(')()()()()()()()())))((()() things
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<shevy>
I used to once think "hey... T and F... that is much shorter"
<shevy>
but it just isn't really worth it at all
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<seanstickle>
No, Common Lisp is some sort of Scheme abomination
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<jrajav>
Scheme is still nicer for functional programming
<jrajav>
Try assigning a block to a variable in Ruby
<jrajav>
:P
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<seanstickle>
a = Proc.new ?
<jrajav>
Okay, then try calling it
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<jrajav>
Yes I know it's possible *sigh*
<seanstickle>
a.call
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<jrajav>
Not the point :P
<shevy>
lol
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<seanstickle>
Well, then your point is pretty bad
<seanstickle>
:P
<shevy>
scheme has not the () disease of lisp?
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<jrajav>
Nope, it still does
<jrajav>
All Lisp dialects do
<shevy>
die(), scheme, die()!
<seanstickle>
shevy: it has the lovely awesome beauty of ()
<seanstickle>
shevy: if that's what you mean
<shevy>
one () is ok
<seanstickle>
It's no APL, of course
<seanstickle>
But it's pretty good
<shevy>
but the ((((((((((((((((()))))))))))))))))))))
<pjr>
shevy, close 'em
<shevy>
grrrr
<shevy>
it's all XML to me
<jrajav>
Please, no one ever make an XML-based Lisp dialect
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<jrajav>
Even as a joke
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<jrajav>
(Though to be honest that would be pretty hilarious)
<Tasser>
jrajav, lollisp?
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<seanstickle>
jrajav: they have already
<seanstickle>
Years and years ago
<jrajav>
Speak of the devil, and he shall appear
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<Tasser>
seanstickle, link?
<seanstickle>
Tasser: google it, I don't remember the name
<seanstickle>
Years ago
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<Mon_Ouie>
Doing the opposite is common though (generating XML from S-Exps)
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<Tasser>
shevy, it's (die) btw
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<shevy>
hehe
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<s1n4>
shevy: wats up with Dir.exist? ? :D
<shevy>
yeah I am using it
<shevy>
btw
<shevy>
["history"].to_s # => "["history"]"
<shevy>
was this always that way?
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<s1n4>
shevy: you should select an element then you can use .to_s
<s1n4>
shevy: array[0].to_s
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<Hanmac>
shevy its diferent from 1.8 if you ask
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<shevy>
ok
<shevy>
s1n4, yeah
<shevy>
I was just confused because I could swear it used to be different
<asklow>
hello, I'm not here to trolling but I'd like to know why ruby's open source community is small compared to python's. At least that is the sensation I have
<s1n4>
Hanmac: whats the difference ?
<shevy>
asklow depends on which part you measure. I think the bindings to libraries are harder to do in ruby than in python
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<asklow>
shevy: why is that ?
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<shevy>
not sure
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<shevy>
I don't know C for example :)
<shevy>
ruby-gnome has only very few contributors though
<asklow>
shevy: but ruby is very similar to python
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<dhaivatpandya>
hi everyone. I'm an author at RubySource (http://rubysource.com/) - we're absolutely dying to get good content for the coming week, and, if we can't make it, SitePoint (our parent site) might pull the plug on us. Would any of you guys have any ideas for guest posts?
<dhaivatpandya>
We pay quite well ($200/article)
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<ctp_>
hi all. what's the smartest way to strip down a hash to a few keys? e.g. i have a hash {:a => "foo", :b => "bar", :c => "foobar", :d => "baz"} and only need {:a => "foo", :d => "baz"}.
<apeiros_>
ctp_: if you're in rails or use activesupport: Hash#slice
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<apeiros_>
o0
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<ctp_>
by the way: there was a cool gem which extends ruby's base (e.g. additional filters to ruby hashes etc.). didnt find it anymore. anyone knows what i'm talking about?
<ctp_>
got it: Facets
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<the_mechanic>
Hi
<the_mechanic>
is there anyway in ruby to cast one class as another class?
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<havenn>
the_mechanic: What is casting?
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<the_mechanic>
I have a PersistentServerObject class which can read/write objects from ldap, and in front of it I have a Server class which deals with some ground work, validations, etc. I have a couple of class methods which are proxied from Server to PersistentServerObject but the return values are then PersistentServerObject. I would like to find a way to return Server object instead or
<jan0232>
in ruby… is there a way to make a block catch all outputs (like puts) in a variable??
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<korczis>
what is the easist way to distribute ruby application for windows users? i do not want make them install ruby on their own...
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<rburton->
How can I get a rake command to run as a daemon?
<banisterfiend>
korczis: ocra
<banisterfiend>
korczis: ocra builds self-contained windows .exe files
<banisterfiend>
that bakes ruby into it
<davidcelis>
if you think it's good baked, have it fried
<sepp2k>
jan0232: You can reassign (or reopen) $stdin before you yield to the block and then set it back to its previous value after the block finishes. That's not thread safe though.
<sepp2k>
Or you can just yield your StringIO to the block and make the user do "|io| ... io.puts(foo)" instead of "puts(foo)"
<korczis>
banisterfiend: great, thanks
<sepp2k>
Or you can instance_eval the block on an object with an overridden puts method... or directly on the StringIO (though that's probably a bad idea).
<korczis>
banisterfiend: did you tried it? is it good?
<banisterfiend>
korczis: yes it's meant to be good, but i didnt try it cos i'm not a little namby pampy windows girlie like u
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<korczis>
banisterfiend: i have linux on all my machines, but i want to share some apps with lame pampy windows girlie like i am not
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<jan0232>
sepp2k: so how would you suggest doing it? StringIO .. and string_io.instance_eval ?
<{aaron}>
is there a clean way to abstract IO open/close? i'm caching file content in StringIO but I need to be able to treat this the same as file io, i.e. open and close it. i'm hoping to avoid introducing a class that just opens and closes the respective IO
<banisterfiend>
:)
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<{aaron}>
io.new takes FD or an IO but presumably i'd have to obtain the FD by a previous open
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<sepp2k>
jan0232: I'd probably just yield the StringIO to the block.
<{aaron}>
or i suppose i could assume in my code that it is always using an opened descriptor and just rewind everywhere :/
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<sepp2k>
Also if you do use instance_eval, don't use strings with it.
<jan0232>
sepp2k: yield the stringIO to the block? how would that look like?
<jan0232>
oh i see…
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<jan0232>
well yea can't really do that :( ...hmm
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<{aaron}>
i guess i'll just introduce an openable/closable IO resource abstraction
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<sepp2k>
jan0232: The problem with instance_evaling on the StringIO is that it will also change the behavior of other methods like gets and you probably don't want that.
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<jan0232>
sepp2k: yea. well my problem actually is…i'm using jruby and a java library that uses the java logging utils… and i want to catch all those log messages in a local ruby variable...
<sepp2k>
So if yielding the StringIO to the block is not an option, I'd create a class that only overrides puts (and possibly print and p) and instance_eval on an object of that class.
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<sepp2k>
jan0232: Okay, yeah, those methods won't be affected at all by any of the options we discussed. They don't actually call puts.
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<jan0232>
seems it doesn't work either...
<jan0232>
i still get the output on stdout
<jan0232>
i think i might need to implement my own logger class in ruby and somehow tell java to use that through a property
<sepp2k>
jan0232: Can't you just tell the logging framework where you want the messages to go?
<sepp2k>
I mean if it just always writes to stdout with no option to log to, say, a file, it'd be a pretty bad framework, no?
<jan0232>
sepp2k: i probably can… i want them to go to a ruby variable though
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<jan0232>
but yea…will have to look into that…it should be possible
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<{aaron}>
durr can't stub method named 'with' with rspec mock :'[
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<sprink>
if I find a gem I am interested in, with `gem search -r gem`
<sprink>
banisterfiend: yea thanks. just trying to figure out which one is best
<banisterfiend>
np, ruby-toolbox is a pretty good site
<sprink>
are these gems not official?
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<workmad3>
sprink: define 'official'
<sprink>
I'm new to ruby, just installed it
<sprink>
as in, supported by the ruby project
<workmad3>
sprink: yeah... that's not how rubygems works :)
<banisterfiend>
sprink: its not part of stdlib, if that's what u mean
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<sprink>
I take it rubygems is kinda like the equvilent of Arch User Repositories, where the packages are maintained by regular users, and not by anyone within the actual project
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<workmad3>
sprink: gems are user supported, yes
<workmad3>
sprink: the entire rubygems ecosystem is community supported, even rubygems itself :)
<banisterfiend>
sprink: which languages do u come from?
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<sprink>
banisterfiend: python most recently
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<sprink>
workmad3: cool thanks
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<sprink>
banisterfiend: gonna take a little getting used to 3rd party stuff
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<banisterfiend>
sprink: doesn't python have equivalent stuff? like 'pip' etc?
<workmad3>
sprink: from what I remember, most python packages are similar
<banisterfiend>
sprink: java has something similar with maven, and perl does too with CPAN
<workmad3>
sprink: unless you only ever touch standard library stuff
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<sprink>
workmad3: yea, pretty much
<sprink>
because it already has soo much in standard
<sprink>
banisterfiend: that makes sense
<banisterfiend>
sprink: what if you wanted, for example, to use a library that nicely wrapped the amazon api ?
<sprink>
it's just ruby makes 3rd party stuff much more accessible
<workmad3>
sprink: there's a massive amount in ruby's stdlib too... but unless you want to build stuff from scratch, it never has everything
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<sprink>
banisterfiend: I would search the web for one
<workmad3>
sprink: true... last time I touched python, it was still mostly easy-install based... and easy-install sucks (and definitely isn't easy :) )
<sprink>
python doesn't have any utilities built in to find 3rd party stuff
<banisterfiend>
sprink: and how would u install it? :P
<banisterfiend>
u'd vendor it in your application?
<sprink>
that would depend on the lib
<sprink>
but I guess that was the confusing part
<banisterfiend>
sprink: yeah, once u get used to the gem way, you'll wonder what a pain in the ass the old way was
<sprink>
because ruby has some official utility for finding and installing 3rd party stuff
<banisterfiend>
i still have to go through that shit when i want to code in objc
<banisterfiend>
it's a pain
<banisterfiend>
though even objc is developing a gems like system, cf cocoapods
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<banisterfiend>
i want Enumerator#[]
<workmad3>
banisterfiend: what happens if your enumerator doesn't support random access?
<workmad3>
banisterfiend: which is why I think it doesn't exist ;)
<banisterfiend>
workmad3: i dont mind if [] is O(n)
<banisterfiend>
in so far as the Enumerator has 'next' (which it must)
<banisterfiend>
[n] can be the result of calling 'next' n + 1 times
<apeiros_>
banisterfiend: first(n).last
<apeiros_>
hm, though that's not correct
<sprink>
apparently curses is in stdlib
<apeiros_>
you'd have to check whether n items have been returned :-/
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<apeiros_>
banisterfiend: anyway, should be easy enough to implement yourself :)
<workmad3>
also, what happens if the enumerator only supports forward iteration?
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<banisterfiend>
workmad3: yeah i see what you mean, calling e[5] and then e[3]
<workmad3>
banisterfiend: yeah... random access isn't a general enumerator concept
<workmad3>
banisterfiend: and on some, it can't even be faked :)
<banisterfiend>
in my mind i just thought of Enumerators as lazy arrays
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<workmad3>
banisterfiend: yeah... the old example would have been a magnetic tape drive... enumerable, but only forward and not random access
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<workmad3>
banisterfiend: it would make sense for a RandomAccessEnumerable, I guess
<workmad3>
banisterfiend: but would probably need you to implement [] manually anyway...
<workmad3>
banisterfiend: although I guess it could be implemented if you had a .first and a .each
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<banisterfiend>
workmad3: Yeah
<banisterfiend>
good point
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<shevy>
There can be only one Highlander Language.
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<virunga>
shevy: i read online people complaining that ruby hasn't good gui libraries
<virunga>
that is the only thing that python has more than ruby
<virunga>
i think
<heftig>
virunga: jruby is better in that regard
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<virunga>
heftig: i didn't know it. But jRuby has other disadvantages
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<virunga>
maybe i good library could help the spreding of Ruby
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<heftig>
I'm following ruby-gir-ffi, I think it's promising
<heftig>
it's the equivalent of pygobject
<Spaceghostc2c>
virunga: It has disadvantages, so does every implementation of ruby.
<virunga>
I'll check it out thanks
<heftig>
you can design interfaces with glade and load them with Gtk::Builder
<shevy>
virunga it is partially true. it depends though
<shevy>
virunga ruby-gnome is usable in some ways.
<shevy>
ruby-qt4, 2 years ago, was ok too
<shevy>
but if I would have to make a score from 1-10 where 10 is maximum... I'd say ruby goes around 4 or 5 only at maximum :(
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<shevy>
for GUI stuff
<shevy>
right now closer to 4 perhaps :P
<heftig>
there's also shoes
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<shevy>
virunga, I used to use ruby-gnome a lot though. built a few "apps"... they semi-work... are not very beautiful. also, sadly, HTML5 + CSS + javascript kind of are really good...
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<heftig>
ruby-gir-ffi lets you use webkit, so you could build a standalone web application with that
<heftig>
including video, webgl and whatever
<virunga>
another thing of complaining i read is that's hard bundle ruby apps... is that true?
<shevy>
hmm
<shevy>
ruby+ffi, I still have to try that
<shevy>
virunga, kinda
<shevy>
well, it's not always ruby's fault
<shevy>
if CentOS has ruby 1.8.5 then people are going to run into problems
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<shevy>
it would be nice to have a on-click-installer for windows
<shevy>
like an app store!
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<shevy>
(for the ruby one click installer, on windows that is)
<shevy>
but at least, ruby works on windows too
<shevy>
virunga, your users will still need ruby to make the app work
<virunga>
yep
<shevy>
this is the first hurdle, which can often be big :-)
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<dcope>
Is there a way to format a string so it's always padded with a 0 if it's one character long?
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<dcope>
ie... 1.to_s == "01". 22.to_s == "22"
<shevy>
dcope you mean like a display listing counting from 0 to 99 right?
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<shevy>
there is the string formatting
<dcope>
i can't seem to find the method in the ruby-doc.org
<shevy>
'%3s' % '1' will become ' 1'
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<shevy>
yeah hmm
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<heftig>
"%02d" % 3
<shevy>
"%09d" % 1 # => "000000001"
<shevy>
yeah what heftig showed
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<shevy>
somehow I did not remember that without having to look at my local docu ...
<virunga>
try it on the bot :)
<dcope>
thank you guys ;)
<dcope>
i see it now on the ruby-doc.org site
<heftig>
>> "%02d" % 3
<shevy>
>> "%09d" % 1 # => TESSSST
<al2o3cr>
heftig: (String) "03"
<al2o3cr>
shevy: (String) "000000001"
<dcope>
it's the first public instancem ethod :)
<shevy>
cool
<shevy>
the bot works :)
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<shevy>
dcope, yeah... sometimes hard to google. like how to google for the splat operator, without knowing that it is called splat
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<shevy>
"ruby *"
<dcope>
sweet, that works flawlessly
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<bperry>
yeah, calling it splat wasn't intuitive to me
<heftig>
bang splat pow!
<heftig>
! * **
<bperry>
I heard some coworkers talking about these splats and I at first it sound like a conversation I didn't want to be overhearing :/
<dcope>
lol
<bperry>
I knew exactly ho wto use it and had been using it in a few places
<shevy>
hey fowl ... nice trailer ... at 0.32 it reminds me of the game "assassin's creed"
<shevy>
"I now pronounce you man and knife."
<shevy>
yeah
<shevy>
stallone is kinda deadish zombielike
<shevy>
:(
<shevy>
but it's his farewell tribute kinda
<shevy>
and his son died not long ago so that sucks too
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<shevy>
stupid steroids
<virunga>
ehi do you know raspberry pi? It's cute
<RubyPanther>
It only gets two small deductions, there not a huge number of specialized pre-built widgets, and if you're using a GUI builder there are version-compatibility issues that are not always well documented
<shevy>
RubyPanther, isn't that a bit too high a score? they are lagging behind for gtk3
<virunga>
i want it
<RubyPanther>
What would Gtk give me?
<shevy>
hehe
<shevy>
virunga, nope, no idea really... I kinda didn't pay much attention to smartphones etc...
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<shevy>
good old desktop user until I die...
<virunga>
shevy: isn't a smartphone
<virunga>
give it a look
<shevy>
ok googling
<virunga>
it's a low cost pc
<virunga>
30 $
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<shevy>
aha
<shevy>
I see only crappy pictures so far :P like a chip only
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<cj3kim>
hi
<RubyPanther>
I can already write an app in linux, see it perfectly in gnome including the tray app, and then if I have a windows host it is just the one click installer, the devkit, and my app is running... including the tray app
<shevy>
but Prolog... there is something in it that could be useful
<shevy>
perhaps
<ReginaldTan>
shevy: i think visual basic is more your style
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<virunga>
lol... it's too late for that jokes.. nice anyway :D
<GeekOnCoffee>
everybody should at some time in their life learn a language where you have to manage your own memory (C++)
<GeekOnCoffee>
preferably sooner rather than later in life
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<GeekOnCoffee>
if you can spend some time learning assembly programming, all the better
<virunga>
lol
<shevy>
ReginaldTan, this visual basic ... isn't that the thing with the annoying endFunction things?
<GeekOnCoffee>
virunga: I'm not joking
<shevy>
assembly perhaps, it seems interesting
<shevy>
but C++ I really hate
<shevy>
TEMPLATES
<shevy>
Hanmac, say why you like templates in C++
<GeekOnCoffee>
shevy: I hate it too
<GeekOnCoffee>
ditto for assembly
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<shevy>
hehe
<shevy>
assembly could be pretty interesting though or?
<shevy>
like you are very close to the machine
<shevy>
brain-matrix interface
<virunga>
i loathe it
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<GeekOnCoffee>
it's interesting, and it'll make sure you appreciate ruby
<ReginaldTan>
virunga: watch this project to bring us up to 1300 again :P thx
<seanstickle>
APL is a good thing to learn too.
<seanstickle>
Potentially better than C++, I'd say
<virunga>
ReginaldTan: what are you writing about?
<ReginaldTan>
virunga: i dont know
<shevy>
haha
<shevy>
good answer :)
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<virunga>
my english is too bad and it's quite late here to understand this things
<virunga>
is it another joke?
<virunga>
aahahahahah
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<GeekOnCoffee>
I'd never write assembly or C++ professionally (famous last words) but every once in a while I see something going on in ruby that I can attribute to the way ruby must be written
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<ReginaldTan>
GeekOnCoffee: ruby is written in C, not C++
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<shevy>
hmm
<shevy>
would ruby have been slower if it would be in C++ rather than C?
<ReginaldTan>
shevy: no..
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<virunga>
ReginaldTan: where are you from?
<ReginaldTan>
virunga: None of your business.
<GeekOnCoffee>
ReginaldTan: meh, same difference
<ReginaldTan>
GeekOnCoffee: not really, they're significantly different :)
<ReginaldTan>
GeekOnCoffee: A good C++ programmer is not necessarily a good C programmer, and definitely vice-versa.
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<virunga>
ReginaldTan: why are you so rude?
<GeekOnCoffee>
ReginaldTan: I know, but from the perspective I'm coming from, there's no major difference
<shevy>
hmm
<shevy>
somehow I would have thought that C code tends to be marginally slower than C++ code, provided that those who wrote the same functionality would be experts in the respective language
<ReginaldTan>
GeekOnCoffee: " but every once in a while I see something going on in ruby that I can attribute to the way ruby must be written" was so vague it's hard to know what perspective you were coming from at all :)
<shevy>
sorry
<shevy>
C code marginally *faster than C++
<GeekOnCoffee>
ReginaldTan: I'm recommending it simply for ruby devs to learn about how manual memory management works, etc
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<seanstickle>
shevy: FORTRAN can be faster than C for some purposes
<seanstickle>
shevy: it's not all about bare metal stuff
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<shevy>
GeekOnCoffee, that is very hard to wrap the head around. I read a C++ book many years ago... it was not easy to understand memory management. in ruby, everything really seems so much easier to do
<GeekOnCoffee>
but ReginaldTan your point is a valid one.
<shevy>
I used only php for like 1 year before I read that C++ book lol
<GeekOnCoffee>
shevy: exactly :)
<shevy>
seanstickle, yeah I read that a few times
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<seanstickle>
shevy: same with Ada
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<cj3kim>
would any of you still consider the book "The Ruby Programming Language" from 08 a must read?
<alienaut>
rails 3.1 is ok with ruby 1.9.3
<alienaut>
?
<virunga>
cj3kim: it's updated
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<virunga>
cj3kim: it explain 1.8 and 1.9 either
<virunga>
i find it a nice book
<shevy>
cj3kim I think it is better than no book at all
<shevy>
4 years is a long time tho
<shevy>
my favourite one was pickaxe in 2005 or 2006
<shevy>
I was totally new, and I didnt know anything in it
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<shevy>
when I bought the new pickaxe in ... 2009 or something like that, I knew 60% already :(
<shevy>
it explains the stdlib though, that is always helpful
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<virunga>
'night
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