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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<Avi`>
is there a cleaner way to express something like "if this array is empty, return "some string" else do.some.operation.and.return.it " outside of exactly what i wrote
<Avi`>
i always feel silly writing code like that in ruby
<Avi`>
(i basically write if array.empty? return "string" else return 'operation' end)
<Avi`>
i was thinking .. return 'operation' unless ar.empty? but that doesn't let me do something if the array is empty to change what i return
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<mksm>
array.empty? ? "blop" : foo()
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<Avi`>
oh ternary statement
<Avi`>
why didn't i think of that
<Avi`>
that seems like exactly the kind of thing a ruby person would do
<Avi`>
(seems hard to read to me, but whatever)
<Avi`>
im tired of people rewriting my checkins cause they aren't 'ruby enough'
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<mksm>
iirc it's originally from C
<Avi`>
ternary? yeah it is
<Avi`>
atleast i picked it up from C++ anyway
<Avi`>
i just don't use them often because i think they are harder to read =)
<Avi`>
intent is lost in two tiny ass characters, ? and :
<chessguy>
i would expect those two puts statements to output the same thing
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<mksm>
chessguy, passing a block and passing a proc is not the same think
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<mksm>
*thing
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<mksm>
chessguy, if you want both to work, check #block_given?
<mksm>
that way you can #yield or #call
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<chessguy>
mksm: but inside of fiddle, block is a proc, right?
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<mksm>
chessguy, it works like one, but you cannot call proc instance methods on it.
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<mksm>
chessguy, i cannot explain why it is like that. Probably someone with knowledge of the internals can/will.
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<un1x01d>
Hi, is there a way to use standard syntax while loops within capistrano ?
<zedUNDginger>
un1x01d: i dont know
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<shevy>
standard syntax?
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<fleas>
standard syntax as opposed to non-standard, just a guess. :-)
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<shevy>
hmm
<shevy>
what does that even mean
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<callahad>
I have a stupid question. What's the most idiomatic way to test if a variable is one of a handful of values? In Python I would say: if var in ["foo", "bar", "baz"]. It seems like the most direct translation to Ruby would be: ["foo", "bar", baz"].include? var, but that seems to read a bit funny.
<callahad>
Is that fine Ruby style, or is there a more idiomatic way to test that condition?
<shevy>
callahad sure it is fine. if array.include? variable, do something. puts 'Yup, found it.' if %w( foo bar baz ).include? 'foo'
<ryanf>
callahad: yeah that is very common ruby style
<shevy>
hmm python seems to be shorter here
<ryanf>
yes, that is true
<shevy>
if var in ["foo", "bar", "baz"]
<callahad>
Great, thanks all! It just felt a little funny to say "does this array contain var" when I really mean to express "is var one of these values?" Logically the same, semantically different.
<shevy>
if %w( foo bar baz ).include? 'foo'
<shevy>
hmm
<ryanf>
if that bothers you, you could define .in? on Object and have it take an Enumerable and call include?
<shevy>
ah
<ryanf>
(note: I am not recommending that)
<shevy>
hehe
<ryanf>
actually I think rails might do that, I don't know what its definition of in is
<ryanf>
haha yeppp
<shevy>
it does?
<ryanf>
yes
<callahad>
ryanf: Hah! I'd rather not monkey patch to get around my own little itch with the language :) Thank you, though!
<shevy>
I don't know much about rails
<shevy>
but it has a lot of magic :(
<ryanf>
shevy: activesupport, one part of rails, is mostly a collection of core extensions
<ryanf>
rails has invented a bunch of stuff that later ended up in the core language though
<ryanf>
like &:this
<shevy>
eeks
<callahad>
Though this *is* a rails project…
<shevy>
but then again... I dont like ->
* callahad
eyes ActiveSupport's .in?
<shevy>
and that was invented by matz I guess :D
<ryanf>
oh well there you go callahad
<ryanf>
if it's a recent version of rails it'll already be there
<ryanf>
shevy: yeah I don't think anyone really likes ->
<ryanf>
except matz
<callahad>
And it makes me feel all semantically happy :)
<ryanf>
and presumably RubyPanther
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<shevy>
there was some nice use of ->
<shevy>
I think petercooper did it
<zedUNDginger>
callahad: that's the idiomatic way
<ryanf>
yeah it is true that getting used to include? is probably a better idea
<zedUNDginger>
ryanf: heya
<ryanf>
I don't know why they even added in? considering that anyone who's spent time programming ruby will bang out .include? without even thinking about it
<shevy>
hmm
<ryanf>
zedUNDginger: sup broski
<shevy>
is "in" a keyword in python?
<ryanf>
yes
<callahad>
Clearly to sway people like me. But yeah, include? it is. No need to throw rails-isms in places they don't need to be.
<zedUNDginger>
ryanf: had a pretty lulzy debugging session with a guy, ill show u the gist and see if u can figure out what's going on
<ryanf>
go for it
<callahad>
shevy: Yep. "foo in bar" is an expression more or less exactly equivalent to Ruby's "bar.include? foo"
<ryanf>
except that include? is a method
<ryanf>
how does in work with duck typing?
<ryanf>
is there like a special function that you can define that it calls?
<ryanf>
like uh __include__ or whatever
<shevy>
hmm
<ryanf>
or does it only work on lists?
<callahad>
I think it's __in__()
<zedUNDginger>
ryanf: ok the deal is that this guy wanted to see what the source was of the method that would be called inside a 'super'
<ryanf>
oh I see
<ryanf>
haha nice
<ryanf>
so he did binding.pry inside a method that had a super?
<callahad>
ryanf: Ah, here it is. y in x === x.__contains__(y)
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<ryanf>
makes sense
<ryanf>
zedUNDginger: are you going to send me a gist or what?
<zedUNDginger>
and he wants to know the method that'll be called with a 'super'
<zedUNDginger>
ryanf: but he was getting a 'no such superclass' whenever he did it
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<ryanf>
ooh
<zedUNDginger>
ryanf: we were really confused for ages
<zedUNDginger>
but i think i give it away at the end of that gist
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<ryanf>
oh yeah I was wondering what else there was
<ryanf>
spoilers :(
<ryanf>
anyway that is a good bug, I'm sure cirwin will like it
<ryanf>
if he hasn't seen it alreadyt
<ryanf>
-t
<zedUNDginger>
ryanf: it's not a bug
<zedUNDginger>
IMO
<aces1up>
i have an array of urls, i would like to append http:// on each element if it doesn't exist and then assign this to a variable, would i use map for this?
<zedUNDginger>
ryanf: what's your understanding of the situation?
<zedUNDginger>
ryanf: basically pry is doing almost 100% the right thing, it was just us who were confused
<ryanf>
--super is only looking at actual ancestors of the class, but super itself can call ancestors of the singleton?
<zedUNDginger>
ryanf: it can ;)
<ryanf>
what can
<zedUNDginger>
ryanf: but the trick is look at how he specifies the method
<ryanf>
oh hahaha
<ryanf>
right
<ryanf>
ok
<ryanf>
so what about just doing show-method --super then?
<ryanf>
does that work?
<zedUNDginger>
that would work perfectly
<zedUNDginger>
yeah :0
<zedUNDginger>
:)
<zedUNDginger>
that's what we did in the end: show-method write --super or show-method --super
<ryanf>
right, makes sense
<zedUNDginger>
they both work, it was just when we specifically referred to teh Class#instance_method that it didnt work
<ryanf>
I guess we should make sure people know about the default behavior of those commands
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<zedUNDginger>
which is correct behaviour
<zedUNDginger>
ryanf: the only mistake pry makes in that whole gist IMO is the result of the 'whereami' command
<zedUNDginger>
but aside from that it was just us forgetting about singleton class methods
<zedUNDginger>
that made it so hard to figure out
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<aces1up>
.map {|ele| "http://#{ele}" if !ele.include?('http://')} how can i fix this so that it just returns ele if it already has http:// ?? right now it returns nil for that element.
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<ker2x>
Friendly greetings ! i'm currently reading a code that use this kind of construction, and i don't understand anything about it : def [](name) , def []=(name, message) ,def call(*), then use it like this : object["clone"].call(receiver, context)
<ryanf>
ele.include?('http://') ? ele : "http://#{ele}"
<ryanf>
aces1up: ^^
<ker2x>
googling for it was, of course, useless as google doesn't search for []= or []
<ryanf>
ker2x: [] is the method on a class that is called when you use the [] operator on an instance of it
<incluye>
or =~
<ryanf>
so object["clone"] is the same thing as object.[]("clone")
<thomasfedb>
Hey. Any news on ruby-debug + 1.9.3? People are already migrating back to 1.9.2...
<aces1up>
ryan thanks
<ryanf>
[]= is similar: object["clone"] = foo is the same as object.[]=("clone", foo)
<ryanf>
=~ is the operator for matching a regex against a string
* ker2x
scratch his head and read the answer a dozens of times.
<ker2x>
i take a few mn to understand it then come back if i still don't understand. thank you :)
<any-key>
ker2x: think of it like operator overloading
<any-key>
if you're familiar with that
<ker2x>
yup
<any-key>
for example, in a hash the [] operator is used for access
<any-key>
similar concept, but the code you're reading is defining its own version of that operator
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<ker2x>
(if it wasn't enough, the args are anonymous function created with proc , but that's another story :p)
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<ker2x>
so the object "object" (wich is defined in the Object Class) is behaving like the Array class (but with its own "Object" method instead of the "Array"). ?
<ker2x>
(instead of the "Array" methods)
<any-key>
unless it's a subclass of Array that's not a safe assumption
<any-key>
all it is doing is using the bracket operators
<ker2x>
understood :)
<ker2x>
thank you
<ker2x>
and what about : def call(*) ? what is this * ?
<RubyPanther>
I don't like -> any more than anybody else, I just hate it less and like to laugh at it
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<ker2x>
in fact, the full code is :
<ker2x>
def call(*)
<ker2x>
self
<ker2x>
end
<ker2x>
odd
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<ker2x>
does it evaluate the anonymous function passed as argument ?
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<any-key>
RubyPanther: -> reminds me of the "goes to" operator a friend of mine came up with for C
<ker2x>
(yes, the code i'm reading is most certainly far above my ruby knowledge)
<any-key>
for(int i=10; i -> 0; i--)
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<any-key>
ker2x: I don't quite understand it either
<ker2x>
ok, no problem, i'll mail the writer of this code :)
<any-key>
I'd like to know what the hell that does, fidgeting with the code in IRB doesn't make it do anything other than return "main"
<ker2x>
# The call method is used to eval an object. By default objects eval to themselves.
<ker2x>
that is the comment that come with this code :))
<any-key>
seems like a hack
<ker2x>
one last question please, and i think it will help me a lot to read the rest of the code that have less unkown syntax to me (and that have un-googlable syntax) : val ||= @value && @value.dup rescue TypeError
<ker2x>
is ||= similar to somethink like += but with || instead of + ?
<ryanf>
yep
<ker2x>
so val = val || ...
<ker2x>
thank you :)
<any-key>
ker2x: careful with ||=, it isn't what you think :P
<any-key>
basically ||= assigns if nil
<ryanf>
or false
<ryanf>
it's exactly what he said it is
<any-key>
yes
<ryanf>
well, almost
* any-key
re-reads
<any-key>
yeah
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<ker2x>
thank you :)
<any-key>
I still want to see an explanation of the call function
<ker2x>
according to his github, he's good at ruby :)
<ker2x>
considering that the code i'm reading is not on his gitbug, but sold with his book, i can't pastebin the full class there is no licence with it, so good old copyright apply ^^
<macmartine>
"gitbug"
<ker2x>
wooops
<ker2x>
huhu
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<ker2x>
lapsus (is it an english word ?)
<any-key>
it is now
<any-key>
and I'm saving "gitbug" for the next time I fuck up the branches on a project ;)
<ker2x>
ha no i was talking about "lapsus", but i just checked wikipedia and it exist in english too and have the same meaning as in french :)
<ker2x>
everything i questionned come from a ruby class that implement Objects in the creation of an homoiconic prototype based langage.
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<ker2x>
the hardest class to understand... and the base of everything else ^^
<zedUNDginger>
ker2x: nah in ruby #<Class:Class> is the hardest ot understand
<zedUNDginger>
it's where all the lines flow into
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<ker2x>
not in this langage (which is just an appendix of the book that very quickly implement an homoiconic langage, just for fun)
<ker2x>
there is no classes :p
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<ker2x>
(only object, method, and messages)
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<mksm>
ffi is kinda magical
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<ker2x>
ryanf: yes, there is sublcass that override the call method. i just checked :)
<ker2x>
so "call"ing object just return object, it make sense :)
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<brownies>
what's the ruby equivalent to C enums?
<Banistergalaxy>
Brownies symbols
<Banistergalaxy>
And symbols are better
<brownies>
oh just :these_things ?
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<any-key>
yes
<Banistergalaxy>
Pretty much
<any-key>
not exactly an enum but sure why not :P
<brownies>
but i want the enum-style functionality of assigning ints in a reasonable fashion to the things
<any-key>
yes
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<brownies>
yes?
<any-key>
symbols are stored once in memory; they're assigned to an integer value which is used to reference them
<Banistergalaxy>
Brownies to do what for example
<brownies>
Banistergalaxy: well, it ties into my database -- where i have a "type" column for a particular object in order to represent subclasses
<brownies>
that references the primaryKey of the ObjectTypes table
<ryanf>
yeah that is annoying
<ryanf>
oh huh
<brownies>
so, you know, i'd just like to have these constants lying around
<ryanf>
brownies: you know, rails can actually help you with that if you make "type" a string
<brownies>
it looks like the Mod.constants might actually get me pretty close? if the ordering of constants is deterministic?
<ryanf>
oh
<ryanf>
well if you are going to be defining the constants in the first place, you might as well just assign the numbers to them?
<brownies>
yea i guess so
<ryanf>
but yeah if you need a complete list of them at some point, you can use #constants
<brownies>
ryanf: where is that syntax explained for modules? the two colons?
<ker2x>
btw, i just finally understood the whole point of the def []=(name, message). It's just syntaxic sugar. it is defined as def []=(name, message) @slots[name] = message end. I could be also created with something like "createSlot(name, message)" but we lose the shinyness :)
<ryanf>
brownies: it's called the scope operator
<ryanf>
yeah ker2x
<brownies>
interesting.
<ryanf>
it's also how assignment to a hash is defined
<ker2x>
Prevents further modifications to obj. A RuntimeError will be raised if modification is attempted. There is no way to unfreeze a frozen object. See also Object#frozen?.
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<ker2x>
interesting
<ker2x>
(im reading about dup() vs clone())
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<zedUNDginger>
ker2x: Hello you read some interesting things, you must be a real autodidact
<ker2x>
kinda... i'm a sysadmin
<ker2x>
not a coder :)
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<ker2x>
the code i'm reading is really confusing. eg : Lobby["Number"].clone(@name.to_i). Lobby is of type Object (not the "Ruby Object", "our" own Object class defined earlier) where the method "clone" is, in fact, a dup :D
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<skim1776>
do fibers really help? I rewrote a simple program with fibers and it's no faster
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<ker2x>
they are blocking ?
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<skim1776>
I guess no
<skim1776>
I took it from the example of fibonacci but replaced summing them by powering, it works the same time
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<ker2x>
well, according to what i understand, fiber is just fine grained scheduling, withing a single thread. i don't see how it could make math faster. It's more about dealing with blocking IO. no ?
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<heftig>
i assume they're somehow involved in enumerators?
<newbieROR>
i need a help for authenticating my user with ruby cas client.... i m receiving an error showing that cas_user session parameter is coming null...can anybody help me
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<Amirh>
Hello World
<yfeldblum>
newbieROR: it's unlikely that there would be many people here who use the ruby CAS client library or are familiar enough with it to help you; perhaps there's a mailing list for that library, or you can send an email to the author, etc?
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<aces1up>
what is the right way to string these chars? this line isn't working at all.. gsub!(/\t\r\n?/, '')
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<csmrfx_>
Banistertab: you got your brick tabletting agin?
<Banistertab>
Csmrfx yes carl
<csmrfx>
whacha do?
<Banistertab>
Csmrfx flashed a factory firmware
<ryanf>
is it really bricking if it's fixable?
<Banistertab>
Csmfx you got a tab yet carl?
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<Banistertab>
Ryanf its called a soft brick
<Banistertab>
Theres also hard and cima bricks
<Banistertab>
Coma
<ryanf>
ahh
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<Banistertab>
Dc
<Banistertab>
Ryanf coma brick
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<Banistertab>
You can always fix them but they just get increasingly difficult
<Banistertab>
And the average user probably couldnt even fix a soft brick
<Banistertab>
Fixing the so called coma vrick requires u to use a sokdering iron hehe
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<csmrfx>
Banistertab: no tablets
<csmrfx>
got gingerbread phone
<csmrfx>
all I ever do is sit at home at my desktop so a tab would be kinda useless
<Banistertab>
Csmrfx cool
<Banistertab>
I habe too many things and feel iverwhelmed
<Banistertab>
Overwhelmed
<csmrfx>
I get some dev vibes from android tho, who knows I might get turned on to tablets
<Banistertab>
Laptop smartphone tablet desktop
<Banistertab>
Too much too much
<Banistertab>
I just sit ther in a stupor not knowing what to do
<Banistertab>
And keepinfg everything synced is a ightmare
<Banistertab>
Nightmare
<csmrfx>
yeah I got laptop I use as a desktop, a small desktop thats portable for working at clients office and a netbook for surfing at home :D
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<csmrfx>
aw just set up a NAS
<Banistertab>
Im using dropbox
<Banistertab>
But onky just startng to get into using it seriously
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<csmrfx>
ahh, when tech becomes an end in its own means
<Banistertab>
Csmrfxtablets are great fu though
<Banistertab>
Fun
<newbieROR>
thank u yfeldblum ...actually i m bit confused with the present situation as i m not receiving any error but its asking to configure force_ssl_vrification => false...can u pls suggest where to config this...although i know its not safe
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<csmrfx>
yeah maybe if I had a tablet I'd leave my home once in a while......
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<csmrfx>
so I suppose the cloud is needed when we all will have +5 networked flat things with amoleds and 4G
<csmrfx>
I only wish ruby was more at home on android
<csmrfx>
dont even know how iphone relates to rubies
<csmrfx>
(and its kin)
<csmrfx>
(or I really hope that something like meego would take over the mobiles too so I could just apt-get and rvm around)
<yfeldblum>
newbieROR: see the readme, section marked "A more complicated example"
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<StitchedKite>
csmrfx: apt and dpkg were ported to iphone thats what cydia is built on top of
<yfeldblum>
newbieROR: configuration can go in your config/application.rb (applies to all environments), a file in config/initializers/ (also applies to all environments - put stuff here in case your config/application.rb gets too crowded), or an environment file in config/environments/ (used to override specific settings on a per-environment basis)
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<csmrfx>
maybe I should start ruby-android dev group...
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<newbieROR>
thanks yfeldblum but i previously tried to configure it in enviroments development.rb but dont know it not workd for me...but thanks for your help. well i m presently configuring it on linux suse and i m not getting libopenssl-ruby file.can u pls help me on that...
<newbieROR>
one more thing that i thnk i missed is i m configuring a redmine application
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<yfeldblum>
i don't really know anything about suse ... maybe google knows how to install libopenssl-ruby?
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<csmrfx>
you probably would use the package manager
<csmrfx>
but then again, apt-cache says it is in libruby so perhaps you dont have your environment set up right or your ruby version doesn't support the version of libopenssl
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<newbieROR>
thanks yfeldblum csmrfx ...in pakage manager i m not getting lbopenssl , but i tried to compile and run a source file but it didnt helped. can u tell me what should be the syntax if i want to check session parameter :cas_user value in my log..
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<Tasser>
newbieROR, no libopenssl in your package manager? wtf?
<newbieROR>
hey Tasser i think u didnt checkd my name /// it already says dat i m new to ruby and i would be very happy if linux suse enterprise pakage manager help with this...
<newbieROR>
but i didnt get that file ...
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<Tasser>
newbieROR, ruby openssl or openssl?
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<newbieROR>
libopenssl-ruby
<csmrfx>
Tasser it should be in libruby
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<dagobah_>
So, I've come across a situation where two instances of a class share the exact same instance variable (object_id), is this normal?
<csmrfx>
just make sure your libruby is up to date and visible to your ruby implementation
<csmrfx>
dagobah_: same instance of the instance variable?
<newbieROR>
thanks csmrfx i will check dat ...
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<dagobah_>
csmrfx: Same object sorry.
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<dagobah_>
It seems I have two instances of a class, but whose instance variable is shared. It doesn't seem right.
<dagobah_>
I think it's actually perfectly explanatory :S
<heftig>
a = Object.new
<heftig>
b = a
<heftig>
now b and a reference the same object.
<heftig>
changing some aspect of a will change b as well
<heftig>
e.g.:
<dagobah_>
Indeed, I just somehow though in my head that instance variables should be unique to that instance! How wrong I was.
<heftig>
a = ["foo"]
<heftig>
b = a
<heftig>
b << "bar"
<heftig>
the variables are
<heftig>
the objects they reference aren't
<dagobah_>
So an instance variable is an object (which is unique to an instance?) which reference objects which can be used anywhere?
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<heftig>
dagobah_: no, variables aren't objects. variables are object references
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<dagobah_>
How would one see an object's instance variable table?
<dagobah_>
.instance_variables?
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<heftig>
dagobah_: yes
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<Sephi-Chan>
Hello
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<mklappstuhl>
can anyone tell me for what reason I should choose factory_girl over fabrication or the other way around?
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<deryl>
mklappstuhl: there is no reason other than preference, or if you've had issues with one or the other. which is why i use fabrication. i've had troubles galore with factory_girl. none with fabiracation. That being said, I know a slew of people that have had troubles like I have, and I know a slew that have had their fair share of troubles with fabrication. so take your pick.
<mklappstuhl>
deryl: Ok, thanks
<deryl>
np
<mklappstuhl>
I'm about to go with fabrication because of its mongoid support
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<deryl>
i've never played with monogoid, mongodb, or any of those. I'm strictly psql, sqlite3, or mysql. and mysql *very* rarely
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<Reikoku>
Hi all, can anyone tell me if Ruby is a good language to write a client-server collaborative drawing tool using gtk gui objects? :P
<Reikoku>
I'm really struggling with choosing a programming language for this project :/
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<shevy>
Reikoku hmmmmm
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<shevy>
you'd probably have to use ruby-gnome bindings
<shevy>
Reikoku how about C
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<Reikoku>
Considered C, I think whatever language I use I'll have to use some gtk libraries/bindings so that's not a worry
<shevy>
hmm
<shevy>
then it should be ruby vs. python!
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<shevy>
I am using ruby-gnome somewhat, though I wouldn't know how to make a drawing tool in pure ruby ...
<Reikoku>
Main requirements are: need to be able to make a simple (at first) drawing engine for pen/brush/shapes/colours/layers
<shevy>
aaaaand layers
<Reikoku>
With fast net-code to keep everyone up to date assuming 2Mbit connection or so
<shevy>
we are soon at a gimp version in pure ruby :D
<shevy>
hmm
<shevy>
this all screams C to me
<Reikoku>
gimp has filters :P that's the hard bit
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<Reikoku>
And my other requirement was cross-platform, which C is good for as well
<shevy>
yeah
<shevy>
C it shall be!
<shevy>
I am going to pick for you :)
<Reikoku>
But... learning C ;_; lol
<shevy>
yes but remember!
<Reikoku>
My C is not the best :P
<shevy>
ruby is easy to learn
<shevy>
as is python
<Reikoku>
I was stuck at ruby vs python
<Reikoku>
vs perl kindof
<shevy>
which perl version?
<Reikoku>
5
<Reikoku>
Need the CPAN :P
<burgestrand>
Cross-platform C is not as easy as one’d might think, I’d go with a high-level language myself if I could
<Reikoku>
I was hoping to use perl, python or ruby
<fridim_>
what about ruby and inline C for some parts ?
<shevy>
sub under { print "I am perl and I am ugly but that's ok because everyone knows me since almost 30 years!\n";}
<Reikoku>
Of the three I'm most comfortable with perl but doesn't seem 'right' :P
<Reikoku>
I wouldnt know how to start
<shevy>
well
<burgestrand>
As for how good ruby is for that stuff I have no idea, have never done anything remotely GUI-oriented in ruby
<shevy>
I think the three are all in the same boat
<Reikoku>
fridim_: Which bits do you think would require c?
<shevy>
perl is the elderly friendly gentleman. john cleese from monty python
<fridim_>
Reikoku, not sure it needs it, but in case it might be possible I guess
<shevy>
ruby is his handsome daughter. sometimes a bit confused when playing with new things like "to: :bla" or -> ... sometimes using too much make-up. But she is sweet when she doesn't overdo it
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<shevy>
python is the nephew ... went to military school. shows high discipline ... always tries to find one way and only one way to sail the boat and stay on course and in doing so often rescues the elderly perl gentleman
<fridim_>
or maybe jruby (+ java if needed)
<Reikoku>
:D at that analogy
<Reikoku>
Python definitely went to military school
<shevy>
java is the chatty middle-aged family man in the boat... goes to work in the bank sector... always talks and talks and talks and everyone wants to make him shut up sometimes
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<shevy>
but he is a bridge builder!
<Reikoku>
fridim_: Can you foresee any parts which would be impossible/impractical in pure ruby, then? I really dont quite understand the entire scope of the project yet :P
<shevy>
JRuby Groovy and what not! everyone there is a bridge to the faraway land
<shevy>
oops. I meant *everywhere
<Reikoku>
I'm inexperienced with advanced guis
<fridim_>
Reikoku, me neither :D
<Reikoku>
Most of what I write has been web-based or console based
<shevy>
GUIs can be so annoying
<shevy>
I'd go with the web always
<shevy>
"client-server collaborative drawing tool using gtk gui objects"
<shevy>
not that easy to fullfil
<Reikoku>
Dont want to use web :P it pushes me towards Java too much
<Reikoku>
And Java is not my friend
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<Reikoku>
I semi-want to use gtk3
<shevy>
hmmmm
<shevy>
python!
<shevy>
well I dont know if they already have bindings
<heftig>
Integer() and .to_i are different, though. the former will raise an exception if supplied a String not representing a number
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<shellox>
heftig: thanks!
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<heftig>
same with Float()
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<raz>
what's the best/fastest http library these days?
<shevy>
super-http
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<shellox>
raz: sinatra?
<shellox>
ah lib
<raz>
ehm, sorry, i meant http-client :)
<shellox>
i thought framework
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<dbernar1>
My install of Ruby on Ubuntu doesn't know where to find ssl certificates, so it can't use ssl to get contents of web pages.
<dbernar1>
The error contains "SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B"...
<dbernar1>
If googled, that brings up a Stack Overflow page that shows how to fix that.
<dbernar1>
Well, it links to a page with instructions.
<dbernar1>
However, the instructions use plain net/http, which I don't want to use if possible. I'm using open-uri
<dbernar1>
And the instructions show how to configure net/http on the script level, but I would rather set a global variable, or a config directive somewhere.
<dbernar1>
Any advice?
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<jsaak>
use curl?
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<dbernar1>
I guess it could work
<dbernar1>
I'll try
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<dbernar1>
It seems to work fine. However, is it doing the check for the SSL certificate of the server it is getting from?
<dbernar1>
Or did I just make the script less secure?
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<deryl>
dbernar1: iirc you have to install ca-certificates pkg
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<dbernar1>
I have that installed
<dbernar1>
I wonder perhaps the compilation happened at a time when that was unavailable or something :0/
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<dbernar1>
Maybe I'll just re-compile...because I can!
<dbernar1>
jk
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<alanp_>
If I store a greater than symbol (:>) in a variable (greater), how can I use it to then compare 2 integers?
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<mike___>
hi guys. i have two strings of same length and want to check if one is obtained from the other by a substitution of letters. is there some neat way to do this in ruby?
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<yfeldblum>
var1.send :>, var2
<jensn>
alanp_: Use the `send` method.
<alanp_>
ahhh
<yfeldblum>
comp = :> ; var1.send comp, var2
<mksm>
mike___, you mean like the distance between both?
<alanp_>
awesome
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<mike___>
well, for example: abba can be transformed to caac, by a->c, b->a. but it can't be transformed to abcd obviously
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<yfeldblum>
mike___: for the first pair of characters, mark them in a hash (pairs["c"] = "a"); for the next pair of characters, check if the character from the second word is a hash key; if it is a hash key, verify that the character from the first word is the corresponding value; otherwise, add that pair to the hash; proceed ...
<mike___>
yfeldblum: yeah, so the straightforward way... thx
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<yfeldblum>
i thought it was pretty neat
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<grimeton>
hi i'm trying to get tracks up and running, but each time i want to populate the database it errors out and says that it can't find test-unit
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<grimeton>
but test-unit is there and installed
<grimeton>
does one have to refresh a cache or something for ruby to see the test-unit?
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<alaska>
Is anyone in here familiar with the mongo module?
<dbernar1>
Yay! Re-compiling Ruby fixed my problem
<alaska>
I am making a simple map_reduce query with raw results and the values seem to be returning as floats instead of integers
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<muzzle_fuzzle>
on which os would run ruby best? ( best a small os )
<any-key>
Any linux or unix
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<any-key>
basically anything except windows seems to be the rule of thumb
<Reikoku>
Grab gentoo, that's pretty small
<any-key>
or arch
<Mon_Ouie>
It runs fine on windows too
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<any-key>
Not nearly as well
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<muzzle_fuzzle>
it doesnt! :( i have so much problems on win, i could not run bundler install
<muzzle_fuzzle>
because of eventmachine
<any-key>
pure ruby might, but once you start adding other dependencies it gets hairy
<muzzle_fuzzle>
i wanna run siriproxy and i have so much problems with all this
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<yfeldblum>
muzzle_fuzzle: you can run Linux in a VirtualBox virtual machine running on a Windows machine, and run siriproxy in that
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<Reikoku>
Second the virtual machine suggestion, grab virtualbox and stick Arch in it
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<theishi>
I have these two lines 'var1 = var2' and 'var1.gsub!("a","b")'.... when I run this both var1 and var2 are affected... Is this expected, and if so how can I prevent this behavior?
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<BrianE>
theishi: var1 *is* var2. They're both references to the same object
<BrianE>
So they're technically not both being affected, it's just the one thing that's being changed
<csavola_>
theishi: gsub! performs it's operation in place... gsub without the bang returns it's operations without changing the receiver
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<theishi>
csavola_: I know that, I am just looking for a way to prevent var2 from being affected.... i just found the dup command and that was what I was looking for
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<keymone>
hi
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<keymone>
what could be the reason for command to fail when executed through Kernel#system if it successfully executed from shell?
<keymone>
same user, same permissions
<JonnieCache>
environment variables
<JonnieCache>
$PATH most likely
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<JonnieCache>
shell env variables are a source of constant pain
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<JonnieCache>
especially when you bring ssh into it
<keymone>
this is the error code after calling system: 32512
<keymone>
o_0
<JonnieCache>
th
<JonnieCache>
that comes from the specific command youre running, no idea what that means
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<yfeldblum>
what are you trying to run?
<keymone>
ok, PATH does not seem relevant because command specifies full path to binary
<JonnieCache>
because that adds a whole other layer of fun
<keymone>
no, nothing fancy
<keymone>
also $PATH is identical within riuby process and shell where command runs fine
<JonnieCache>
try calling the `env` command to list all shell vars
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<JonnieCache>
run it from ruby and from the cmdline and see if theres a difference
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<keymone>
nothing is different
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<keymone>
system returns false and error code 32512 and if i then copypaste same command into shell it works with exit code 0
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<Kal9871>
Hi, I have a problem and I was wondering if anyone here could help me out. Is there some way of finding out where (at what line and in what file) a method/line of code is defined without raising and catching an exception and using the backtrace method on the exception object? I would use that approach but I'm working in a special environment where the backtrace method doesn't work. Is there any other way of doing this? Any help is appreciated!
<apeiros_>
Kal9871: using ruby 1.9?
<burgestrand>
Kal9871: __FILE__ and __LINE__
<burgestrand>
Or did I misinterpret? :(
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<apeiros_>
Kal9871: in 1.9: foo.method(:bar).source_location gives you that information
<apeiros_>
works with FooClass.instance_method(:baz).source_location too
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<apeiros_>
if the result is nil, it means the method is implemented in C. I'd go via Method#owner then, and grep sourcecode
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<ablemike>
Ruby trivia: anyone know what gsub stands for?
<apeiros_>
global substitution?
<ablemike>
apeiros_: thats our guess here
<apeiros_>
or: globally substitute
<Kal9871>
Using Ruby 1.8.1 unfortunately (lol). I'm working with a RPG game maker called RPG Maker VX that uses Ruby for it's scripting system. All scripts are defined in internal editor. I just tried __FILE__ and it didn't work. It returns "Section095" which I suppose is the internal representation of the script. I will try source_location and report back if it works or not!
<apeiros_>
1.8.1?!? w.o.w.
<apeiros_>
oh, that windows thingy…
<Kal9871>
Yep
<apeiros_>
source_location won't work in 1.8
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<Kal9871>
Ah I see. Thanks though!
<apeiros_>
and given that thing is closed source, I'd assume grepping sources is out of question too…
<Kal9871>
I don't have access to the file structure since it's embed in an .exe and I can't programatically access the source of the other scripts
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<Kal9871>
Hmm it's irritating because if you throw an exception and don't catch it you get a GUI popup window with the line no and the script but I can't figure out how to access that info!
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<apeiros_>
you can rescue the exception
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<apeiros_>
begin; do_stuff_that_raises; rescue => e; …here you can access e.backtrace… end
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<Kal9871>
Yeah I can rescue it but they changed e.backtrace. It returns "Section" plus some numbers which I think is the internal representation of the script (since scripts are not written in their own files, but in a GUI editor)
<apeiros_>
if you're unlucky, they changed it right on exception itself
<apeiros_>
I guess you can't use native extensions either?
<Kal9871>
Thanks, I'll try that! Nope, no native extensions, no gems at all etc. They even removed require and load from Kernel haha but I monkey-patched my own hacked up version
<apeiros_>
did they remove eval and File.read too?
<Kal9871>
No that is still there
<apeiros_>
because load is mostly just eval(File.read(path))
<Kal9871>
Ok tried it and got the same thing back: "Section093:2"
<apeiros_>
then you're off luck I fear
<apeiros_>
at least I'm out of ideas
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<Kal9871>
Yeah looks like it. It's not absolutely necessary that I get to this information but it would be really nice to have. I'll have to live without it. Thanks a lot for your help though!
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<skim1776>
is it possible to wait for all threads to join without explicitely calling t.join on each?
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<shevy>
skim1776 I am not sure... perhaps some sneaky way ... but otherwise I'd say no.
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<skim1776>
shevy, what if I have a few millions of threads?
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<shevy>
lol
<apeiros_>
skim1776: you're doing something wrong then
<rippa>
then your system crashes
<shadoi>
lol
<shevy>
a few millions threads
<apeiros_>
skim1776: anyway, no matter what you do, it'll in the end tell every thread to join
<shevy>
what are you trying to do, store a dollar in every thread
<shadoi>
use ThreadGroup and don't do insane shit.
<apeiros_>
shadoi: ThreadGroup? new thing? ThreadList? or am I confused?
<skim1776>
I'm solving the problem of number of points with integer coordinates within sphere with radius r
<apeiros_>
confused, as it seems…
<apeiros_>
ah, it's ThreadGroup#list, nice…
<shadoi>
*nod*
<apeiros_>
no ThreadGroup#join, though
<apeiros_>
so still having to iterate yourself :)
<shadoi>
yeah
<apeiros_>
skim1776: that's a CPU bound problem, threading in MRI won't help you speed it up
<apeiros_>
in the opposite, it'll be slower
<apeiros_>
you can use jruby, or you can fork. but more forks/threads than cores is futile.
<skim1776>
apeiros_ I'm afraid threading in MRI won't help at all, I use rbx
<apeiros_>
skim1776: threading in MRI does help, but only for IO bound problems.
<skim1776>
not my case
<apeiros_>
what I said about number of forks/threads applies just as much to rbx as it does to jruby.
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<apeiros_>
not even sure rbx already has native threads. rbx2 already out?
<skim1776>
I guess it's not
<skim1776>
or it is, I'm not sure
<apeiros_>
nope, doesn't seem like. rbx 1's threading afair is the same as MRI's
<apeiros_>
won't help you with anything but IO bound problems.
<skim1776>
JRuby then?
<apeiros_>
(or if you need pseudo-concurrency)
<apeiros_>
the problem you try to solve is from project euler?
<skim1776>
I think it can be there too
<apeiros_>
jruby has native threads, yes
<apeiros_>
but again, more threads than your hardware can process in parallel will be slower.
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<skim1776>
hmm.. then I guess I shouldn't use them at all
<skim1776>
apeiros_, guys from #rubinius said that it does support native threads
<apeiros_>
depends, if you have 2 cores, you can get a speed up close to factor 2 for a well parallelizable problem
<apeiros_>
skim1776: ask them for which version of rubinius
<skim1776>
apeiros_, for current version
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<apeiros_>
hm, their announcment for rbx2 still mentions removal of GIL being one of the biggest changes… is it outdated then?
<apeiros_>
wtf, lets just try it…
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<apeiros_>
skim1776: also, important point is not having native threads, but having no GIL
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<apeiros_>
rbx 1's threading may well be based on native threads, that doesn't help much with a CPU bound problem if it still has a GIL
<skim1776>
they said there's no GIL
<apeiros_>
then there's no need to switch to jruby
<apeiros_>
hrm, installing rbx takes quite a bit of time…
<skim1776>
yeah, jruby installs much faster
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<skim1776>
are you installing it with rvm?
<apeiros_>
yes
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<burgestrand>
rbx ≠ 2.0 has a GIL, they ought to be talking about rbx2
<apeiros_>
that wouldn't be "current", though
<apeiros_>
unless people started to talk about non-production stuff as "current", which would be stupid.
<burgestrand>
2.0.0.pre? :p
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<apeiros_>
skim1776: you may want to ask again what version, and ask them to be explicit, i.e. use version numbers, not vague terms like "current"
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<tommylommykins>
hmm
<tommylommykins>
Does ironruby have GIL?
<shadoi>
pretty sure it's abandoned
<apeiros_>
tommylommykins: no idea. might not be in the hands of ironruby
<burgestrand>
I don’t think ironruby has a GIL, but I do believe it has green threads
<tommylommykins>
also
<tommylommykins>
if it's CPUbound in ruby
<tommylommykins>
adn you're interested in speed
<tommylommykins>
Use another language?
<BoomerET>
Anyone here familiar w/ wsdl2ruby? When I puts my result, I get #<GetRecordsResponse::GetRecordsRseult:0xbfoo>... How do I access the elements inside that? Is it an array, and I can access it w/ [0] (or [1], or maybe even ['item']?
<burgestrand>
or another interpreter, which is kind of the point here ^^
<apeiros_>
tommylommykins: as said, unless you're on windows, you can use fork for long running problems
<BoomerET>
Ok, looks like I can get each individual item w/ the array designation, now on to each part of that.
<skim1776>
yeap, there's a developer version but it's not released
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<apeiros_>
skim1776: as I said, that'd be version 2
<apeiros_>
so as I said, *current* rbx does *not* support true parallel threads
<apeiros_>
(and no, dev releases, head, etc. don't qualify as current)
<apeiros_>
seems like my rbx installation is almost done…
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<skim1776>
apeiros_, and it's all for no purpose now
<apeiros_>
o0
<tommylommykins>
hmm
<tommylommykins>
but even if you have a 4core machine
<skim1776>
I mean installing rbx
<tommylommykins>
4 instances of ruby is still goping to be a lot slower than java?
<skim1776>
tommylommykins, you mean ruby program running in 4 threads is slower than java one in 1 thread?
<apeiros_>
depends on the problem, but for many if not most cases, yes, probably.
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<skim1776>
probably not the best language for arithmetical proglems
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<tommylommykins>
What does ruby have over java with arithmetical problems? No static typing to get in the way?
<apeiros_>
tommylommykins: much faster to develop
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<apeiros_>
far less boilerplate
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<apeiros_>
tommylommykins: and if you need the performance, you can still write a C extension
<apeiros_>
or a java extension (in the case of jruby)
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<mkscrg>
I'm looking to do some stats calculations in Ruby. advice?
<atmosx>
shadoi: thanks for answering but I still don't get it. I need to see a code snippet probably...
<atmosx>
the switch is not what I need, that one used when you define the choices from I understand
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<shadoi>
"—tableid TABLEID"
<shadoi>
probably what you want.
<shadoi>
that makes it a mandatory argument for tableid
<shadoi>
capiche?
<shadoi>
atmosx: ^^
<atmosx>
hahah
<atmosx>
what, you're confusing me. Okay I need it mandatory but what that has to do with the type of argument?
<atmosx>
it could be a mandatory boolean
<atmosx>
in my case is a path/to/file
<shadoi>
no, in your code you don't specify that there is an argument, so when you run it, if you use the —tableid option at all it just switches the boolean
<shadoi>
get it?
<shadoi>
just add that to your option, it'll work, trust me. :)
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<Izhido>
afternoon
<Izhido>
do you guys know of a ruby->C# tool around here?
<shadoi>
no, I highly doubt such a tool exists. If it does, the author needs to be publicly flogged.
<Izhido>
huhu
<Izhido>
why?
<Izhido>
<-- knows zip about Ruby
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<shadoi>
Language conversion tools never take into account language idioms, coding standards, or … rationality.
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<Izhido>
aww man
<Izhido>
you're going to make me actually learn Ruby? :)
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<shadoi>
Hey, look at it this way, if you don't have to rely on your IDE, you might actually learn to program for real! ;)
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<Izhido>
all right, let's take a shoot at it
<Izhido>
thanks!
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<austinbv>
requires in ruby really confuse me still
<austinbv>
especially when it comes to gems
<austinbv>
like when you have a gem installed how do you require it?
<burgestrand>
austinbv: in the gemspec for each gem, there’s a list of directories relative to that gem that ruby can look for files that you require
<austinbv>
then in your files you should have to require what?
<burgestrand>
austinbv: most gems have a file in the path lib/gemname.rb, and list the 'lib' direcory as the gems’ load directory in the gemspec, which means you can just require 'gemname'
<Kal9871>
also take a look at the $LOAD_PATH variable to see what directories are included when Ruby searches for files when you use require or load
<burgestrand>
austinbv: the same way, if the gem has a lib/i_am_an_evil_file.rb, you can require that file the same way, require 'i_am_an_evil_file'
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<austinbv>
so for some reason even though the gem is installed that is not working
<burgestrand>
austinbv: which ruby version is it?
<austinbv>
1.9.2
<austinbv>
bundle list shows the gem
<burgestrand>
Alright, which gem is it and what are you trying to require it as?
<austinbv>
the gemspec shows lib/summer
<austinbv>
but require 'summer' gives me a no such file
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<austinbv>
git://github.com/austinbv/summer.git
<burgestrand>
austinbv: can you require it from IRB?
<austinbv>
nope
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<austinbv>
and I have a .rvmrc
<austinbv>
that scopes the gems to that dir
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<austinbv>
with a gemset
<austinbv>
everything seems like it should work... except that
<burgestrand>
If I install the gem myself I can just require 'summer'
<burgestrand>
Are you using bundler?
<austinbv>
yeah
<burgestrand>
I assume you have it in the Gemfile?
<austinbv>
i thought if you used rvm + bundler it saved you from having to do things like bundle exec
<austinbv>
and bundle console
<austinbv>
because you can keep conflicting gems out of the gemsets
<burgestrand>
It *can* save you from having to do bundle exec, but you need to be careful
<deryl>
if you have multiples of the same gem inside the same gemset then its no different than if you didn't have gemsets at all
<burgestrand>
And it only saves you from having to require bundler *if* you install gems to the default location, the system
<austinbv>
ah ok
<yfeldblum>
sticking `export $RUBYOPT=-rbundler/setup` at the top of your script saves you from having to do things like `bundle exec`
<burgestrand>
Even then it’s not a good idea to not require bundler in your projects’ code, because the moment you install a newer version in the gemset that’s incompatible with your project your stuff will break
<deryl>
you'll still run into the same issue of having to bundle exec (or use mpapis-bundler or rubygems-bundler)
<burgestrand>
But yeah, if you install your gems in a non-standard location with bundler, you need to require and set-up bundler in your code for it to be able to find the gems :)
<austinbv>
so then to start something that is using bundler?
<austinbv>
and do you need both
<austinbv>
or can you just use one or the other?
<burgestrand>
You mean between gemsets and bundler?
<burgestrand>
You can use them together if you want to, many people still do; you can use bundler without using gemsets though
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<shadoi>
It's less confusing. :)
<deryl>
we install bundler (since 1.9.2) in 'global' for each ruby installed by default. (global.gems) and rake + bundler in default (default.gems). you don't need to include bundler in your gemset. you just need the regular bundler configuration stuff that rails does normally, or by creating the Gemfile in your project dir for non rails apps.
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<austinbv>
what if you want a bundler locked lower
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<deryl>
then you remove the one from the global and install per gemset
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<deryl>
but bundler really needs to be in the global. not sure if it has ben fixed, but bundler refused to work correctly if included in per gemset.
<deryl>
which is why we moved it into global
<burgestrand>
Huh, strange, never had that problem myself
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<deryl>
burgestrand: mpapis might have fixed that within rvm itself, and we just left it in global afterwards since its the smart place to put it. that part i'm not sure on.
<deryl>
i'd have to talk to michal
<austinbv>
deryl: I have it in every gemset
<austinbv>
so burgestrand in bundle console i can require summer
<austinbv>
but when I try to run a bot that uses the gem
<austinbv>
I still get missing file load error
<burgestrand>
austinbv: yeah, it’s probably because bundler is not set-up in the bot that tries to require summer
<deryl>
that might have changed, however i know we ran into significant issues with bundler if it wasn't in the global due to it not finding gems in gemsets it was installed in.
<burgestrand>
austinbv: require 'bundler/setup'
<deryl>
not sure if micahl fixed that as I said. i'd have to wait til he came live to findout
<burgestrand>
austinbv: in your bot, before you try to require any gems
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<austinbv>
hm that's not it
<austinbv>
No such file to load there too
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<burgestrand>
Huh, peculiar, bundle/setup does not appear to raise an error if the Gemfile cannot be found; try this: require 'bundler'
<burgestrand>
and then… Bundler.setup
<austinbv>
no bundler either
<austinbv>
I am trying something
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<austinbv>
when I pulled everything out of rvm it worked