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<zul_>
Hi all I don't know how can I cast an element of an array of strings to an object. The element of the array is a tweet object (in string). Could you help me please?
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<havenwood>
zul_: What does casting an element mean?
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<havenwood>
zul_: Might help if you can paste your code to gist.github.com.
<zul_>
yes I do it
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<malomalo>
I'm creating a C extension and was wondering if anyone knew how to call a C function and pass a block to it from another C function
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<whitequark>
malomalo: don't, use FFI.
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<malomalo>
whitequark: how about not using FFI, couldn't find a rb_funcall that accepts a block as a param. rb_iterate might be what I need, but not sure what the param VALUE (*method)() should be
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<havenwood>
So where can I buy Ruby 2.0.0 swag? :O
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<breakingthings>
havenwood: use a shirt and a sharpie
<havenwood>
breakingthings: time for a tatoo, i think
<breakingthings>
use a knife and pen ink
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<havenwood>
breakingthings: but then if i ever leave ruby i'll have to cut or burn off the tat >.>
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<malomalo>
whitequark: how about not using FFI, couldn't find a rb_funcall that accepts a block as a param. rb_iterate might be what I need, but not sure what the param VALUE (*method)() should be
<malomalo>
whitequark: sorry didn't mean to send that
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<whitequark>
I would still advise you against writing a C ext :)
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<banister`sleep>
malomalo: proc { |o, m, block| o.send(m, &block) }
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<malomalo>
banister`sleep: I'm in a c method and have the block and want to call another method and send the block
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<banister`sleep>
malomalo: yeah, VALUE block_sender = rb_eval_string("proc { |o, m, block| o.send(m, &block) }")
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<malomalo>
banister`sleep: The other methods a c method, but don't think that helps much. I'm trying to use rb_block_call without sucess...
<malomalo>
banister`sleep: good work around for now.. I shall do that
<banister`sleep>
malomalo: then, call the block_sender and pass along the receiver, method name, and block (as a proc)
<banister`sleep>
that proc just converts a passed proc to a block, which is hard to do in pure c
<banister`sleep>
yeah
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<rickmasta>
Would anyone know why my xpath returns an empty array?
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<ner0x>
using bundler how can I tell it to update a specific gem rather than all of them?
<aedorn>
CodeClimate seems to fail at picking up new files in a repository.. hmm.
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<rickmasta>
Anyone here ever have an issue with Nokogiri returning an empty array with Xpath?
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<wallerdev>
xpath is dumb
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<Sargun>
What have you guys upgraded rails:memcached to?
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<havenn>
Sargun: Probably will get better response in #RubyOnRails
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<raphie>
I've got an array of amplitudes and corresponding time values. I'd like to do a frequency analysis on them. can anyone point me to the right direction?
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<roadt>
hi, how can i translate time to another timezone?
<roadt>
in ruby. is any simple way or method in std library?
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<Myconix>
roadt
<Myconix>
You can probably just subtract the target time with another time instance
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<roadt>
Myconix: ah, nice one.
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<roadt>
Myconix: so stdlib doesn't have explicit zone translation support yet, isn't it?
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<Myconix>
I'm not sure
<roadt>
Myconix: beside to use + - in stdlib, is any good gems suggested?
<Myconix>
I could go check if you
<Myconix>
like
<Myconix>
not for time, no
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<Myconix>
if it bugs you to add/subtract, you could probably modify the TIme module in your script
<Myconix>
and add a function that sets it back hours depending on a given
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<roadt>
Myconix: oh tks, i can check it (stdlib).
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<roadt>
Myconix: you mean patch some code to Time module
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<Myconix>
yeah
<roadt>
Myconix: nice, got it.
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* roadt
will give it a shot and see how it goes.
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<Myconix>
actually, you might be able to do something with utc_offset
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<Myconix>
idono for sure, I never liked the Time instance that much
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<Myconix>
but that's IMO
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<werdnativ>
roadt: Time only handles utc and "local" which is your ENV['TZ'] besides that you can use .localtime('-08:00') to shift it but it won't respect the DST changes like a true local time does.
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<werdnativ>
If you need multiple zones, I highly recommend require 'active_support/time' and use Time.zone = 'Africa/Timbuktu'; Time.zone.now; Time.zone.local(y, m, d); other_time.in_time_zone('Asia/Tokyo') etc.
<roadt>
Myconix: that is readonly attributes, so that i suspect stdlib timezone doesn't have any support. but seems werdnativ do meantion there is localtime(offset) one.;)
<roadt>
werdnativ: ah, tks. rails time enchancement?
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<werdnativ>
yes, rails uses it.
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<roadt>
werdnativ: ah, thanks, i'll give it a try.
<werdnativ>
I kinda wish core ruby had it built in. The basic Time classes kind of suck.
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<darthdeus>
rbenv global 2.0.0-p0 :->
<whitequark>
chruby 2.0 !
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<darthdeus>
is there a solution for the bundler ssl thingy?
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<darthdeus>
i read about it on twitter but didn't find an issue
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<darthdeus>
and just got it "SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed (OpenSSL::SSL::SSLError)" .. :(
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<whitequark>
darthdeus: OS?
<darthdeus>
os x
<darthdeus>
mountain lion
<Hanmac1>
you can use ssl on osx? :D
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<maetthew>
Anyone else having trouble installing 2.0.0 on OSX?
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<darthdeus>
yes
<darthdeus>
i can install, bundle fails with the openssl thingy
<maetthew>
oh so you can install anyway
<maetthew>
:)
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<darthdeus>
maetthew: yeah, but i can't use :\
<maetthew>
I'm trying to install through RVM and get this error message
<darthdeus>
workmad3: installation was successful, then gem install bundler --pre ... and `bundle` anywhere after that fails with the ssl error
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<darthdeus>
should i reinstall openssl in brew?
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<maetthew>
darthdeus: I get the same error message :/
<workmad3>
darthdeus: you could try 'brew install openssl' followed by rebuilding ruby with 'RUBY_CONFIGURE_OPTS="--with-openssl-dir=`brew --prefix openssl`" <ruby-build install command here>'
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<workmad3>
darthdeus: that worked for me last night, and no issues with installing gems afterwards, so I assume that the brew openssl hooks up to your mac CA repository correctly while the ruby-build one doesn't
<darthdeus>
workmad3: is there any "cleaner" workaround?
<workmad3>
darthdeus: not that I know of
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<workmad3>
darthdeus: mac's openssl is too old, you need an updated one, and there seems to be issues with the one that ruby-build installs
<darthdeus>
i do have that one installe with homebrew
<workmad3>
darthdeus: I couldn't even get ruby2 to compile without doing that with the RUBY_CONFIGURE_OPTS :)
<darthdeus>
i'll give it a day or so until it gets fixed in ruby-build :)
<workmad3>
darthdeus: kept on crapping out with weird redefinition errors in openssl stuff
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<workmad3>
darthdeus: I'd personally trust openssl built by homebrew more than an openssl built by ruby-build ;)
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<darthdeus>
workmad3: yeah, but i'd expect ruby-build to use it if it exists :\
<workmad3>
darthdeus: homebrew doesn't add it to the path
<darthdeus>
starting to think if rvm is a better choice :D
<workmad3>
darthdeus: also, ruby-build has already removed stuff to use the homebrew openssl if it exists, because 'they don't want to be too tied to homebrew'
<workmad3>
darthdeus: this problem has been around for the ruby2 preview releases too ;)
<darthdeus>
workmad3: if it works out of the box i don't really care how they do it :) afaik rvm compiles it separately as well
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<darthdeus>
and i think the same thing happesn with libyaml
<workmad3>
libyaml is a bit different from openssl
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<darthdeus>
how come?
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<darthdeus>
it both feels hacky
<workmad3>
libyaml doesn't need the same sort of setup in order to go from 'compiled' to 'usable'
<workmad3>
openssl you need to compile, then you need to set up things like trusted CA certs, etc.
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<workmad3>
if you don't, then things that use it start to get things like certificates that can't be verified
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<darthdeus>
this might sound really dumb but .. why can't it just install the correct version with the curl-ca-bundle?
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<workmad3>
darthdeus: it could, and arguably should... which is part of why I trust homebrew's version more than the ruby-build one ;)
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<workmad3>
darthdeus: as at least that one tells you about the curl-ca-bundle and gives you the ability to install it easily
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<darthdeus>
workmad3: but we should have a "one-click-easy-install" thing, not a "read 50 articles about openssl and certificates before you can use 2.0"
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<darthdeus>
the moment someone tells me to change compile parameters to make it work it's instant "i'm not using this in production" :)
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<workmad3>
darthdeus: it's only mac that you need to do it
<maetthew>
darthdeus: my problem seems to have been that the XCode Command Line Tools got fucked up last time I updated XCode
<maetthew>
seems to be working now after reinstall
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<workmad3>
darthdeus: because the mac version of openssl is too ancient... no other common platform seems to have the issue
<workmad3>
darthdeus: also, it's pretty damn common to have to change compile parameters in production builds to tune things :P
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<darthdeus>
workmad3: tuning !== making it work, and last time i checked about 70% rails developers use macs :P github uses macs, everyone i know but one guy uses macs ... :)
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<darthdeus>
workmad3: nothing against linux, but it should work out of the box on a mac, no matter what the OS has by default
<workmad3>
darthdeus: sure, for development... not production
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<darthdeus>
maetthew: reinstall os x or xcode?
<maetthew>
darthdeus: well xcode :)
<darthdeus>
maetthew: because i upgraded to mountain lion yesterday
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<workmad3>
darthdeus: I use a mac for dev, I just accepted that if I wanted to use ruby 2 the day after release, on a platform that has dependencies that are known to be too old, I'd need to tweak a couple of things
<workmad3>
darthdeus: no doubt the build issues will be sorted out, at that time I'll evaluate if I trust the way they do it
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<workmad3>
darthdeus: but ruby-build has been circling this issue for months now without actually settling on a decent solution
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<JonnieCache>
its because apple refuses to use anything thats GPLv3
<workmad3>
darthdeus: I haven't paid much attention to rvm, maybe their solution is better (probably is, they seem to be a bit hotter on getting things working)
<darthdeus>
workmad3: what d you suggest other than ruby-build though?
<workmad3>
JonnieCache: ah, that's good to know :)
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<JonnieCache>
so a lot of the stuff they stick at the last gpl2 version
<JonnieCache>
so half of the shit is out of date
<JonnieCache>
thats also why it doesnt use samba any more
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<workmad3>
darthdeus: compile by hand, use rvm, use ruby-build, see if you can find a binary build, see if homebrew has an updated formula for ruby 2 yet... many options
<JonnieCache>
the fear of course is that apple plans to lock down os x completely within a few years
<JonnieCache>
because the gpl3 has clauses which prevent that
<workmad3>
JonnieCache: they probably are :)
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<workmad3>
JonnieCache: hell, I'm still on 10.6, in part because I don't like how they're forcing everything through the app store in later versions
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<JonnieCache>
i guess they think they'll have locked enough developers into making money off the ios ecosystem by that that the inevitable developer exodus back to linux wont matter
<JonnieCache>
*by then
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<JonnieCache>
theyre not forcing everything through the app store, depending on what you mean by forcing. you can still run whatever binary you want if you disable the signature check
<darthdeus>
workmad3: tryin rvm install now :) let's see how that works
<JonnieCache>
but yeah the writings on the wall isnt it
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<kernelpanik>
Hi guys!
<kernelpanik>
the best way to set in a ruby script the argument?
<hoelzro>
kernelpanik: what argument?
<hoelzro>
like ARGV?
<kernelpanik>
I would like do like " myscript.rb -n node1 node2 node3 :"
<kernelpanik>
yes
<kernelpanik>
but reading all after -n in this case
<hoelzro>
kernelpanik: you should probably use an option parser then
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<kernelpanik>
the class
<kernelpanik>
option parser?
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<hoelzro>
I don't have any particular one that I can recommend
<hoelzro>
I don't actually use Ruby that much
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<finnomenon>
I used 'jcommander' for a java project. I suggest you google "jcommander for ruby"
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<girija>
kernelpanik, you might use trollop gem for it
<artagnon>
If I put a README.rdoc in my extra_rdoc_files (in the gemspec), how do I access it via ri?
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<artagnon>
Never mind, I just found out: `ri gemname:README.rdoc`
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<Eerbin>
does ruby support to_s for all objects?
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<Hanmac>
jep
<workmad3>
Eerbin: there's a to_s on Object, so all objects inherit it
<workmad3>
Eerbin: unless you create a subclass of BasicObject, or explicitly undef to_s for something
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<puppeh>
hoelzro: hm so how would u solve this?
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<hoelzro>
you should either override ==
<hoelzro>
or convince RSpec to compare things structurally
<puppeh>
ok thx
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<TriOptimum>
Capitalization of method names doesn't actually matter right?
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<fbernier>
is there an option to tell RVM not to get the binary ruby and compile from source instead?
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<kraljev3>
In Ruby 2.0, there are named function parameters
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<kraljev3>
how does the call differ from hash as the last argument
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<hoelzro>
kraljev3: my guess is optimization, and you don't have to unbox the arguments
<hoelzro>
ex. you don't have to do foo = params[:foo]
<kraljev3>
i mean
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<kraljev3>
how does interpreter know
<kraljev3>
which type of call do you mean to make
<kraljev3>
foo(bar: 'bar', buz: 'buz')
<kraljev3>
are those named parameters, or ending hash
<kraljev3>
foo {bar: 'bar', buz: 'buz'}
<hoelzro>
good question...
<hoelzro>
they make have changed the syntax a bit
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<kraljev3>
afaik it is the same
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* hoelzro
shrugs
<Hanmac>
its only different for the function itself
<hoelzro>
I haven't looked into it that much
<hoelzro>
although I'm happy they added them
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<zul_>
Hi guys I have a string with this chars a = "helloè cioè" if I do a.split(/\W+/u) I get ["hello", "cio"] and I loose that chars. How can I solve this question?
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<workmad3>
kraljev3: looking at some examples, the interpreter just figures out that 'foo(bar: 'buz') ' matches the named param in 'def foo(bar: "fizz")'
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<Hanmac>
hoelzro: wrong poss of the ^ "helloè cioè".split(/[^[:alpha:]]+/u) #=> ["helloè", "cioè"]
<_bart>
Since I updated to ruby 2.0.0 I get this: ArgumentError: cannot interpret as DNS name: nil
<_bart>
in .rvm/rubies/ruby-2.0.0-p0/lib/ruby/2.0.0/resolv.rb:1176:in `create'
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<_bart>
Ah, narrowed it down even further, this crashes: Net::HTTP.get_response(URI.parse("http://#{Alexa::API_HOST}/?" + 'google.com' + "&Signature=" + CGI::escape('abc')))
<_bart>
with: ArgumentError: cannot interpret as DNS name: nil
<_bart>
Ah, even this crashes with that error: Net::HTTP.get_response(URI.parse('http://google.com'))
<ExxKA>
Hey guys. Do you know if the Syslog library in the standard lib is blocking or async? Alternatively, does it use UDP og unix sockets?
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<workmad3>
shevy: that just looks like the tokenizer barfs on some edge-case kw arg stuff
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<dmonjo>
if i have a class inside a module, why do we refer to it as module:class, isnt the : used for a constant? is the class considered as a constant since it starts with a Upper case?
<hoelzro>
dmonjo: because the class object itself is a constant
<dmonjo>
cool
<hoelzro>
whch is *really* cool when you think about it.
<hoelzro>
exactly ;)
<dmonjo>
hoelzro: now if i have a class inside a class inside another class
<dmonjo>
like inner classes
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<dmonjo>
how can you reference the variables inside these inner variables when you initializethe main classs
<dmonjo>
for example class1 < classe2 <class3
<_bart>
shevy: alright, I'm rollin back to 1.9.3-p392
<dmonjo>
class1.new
<hoelzro>
that...is a good question
<hoelzro>
I've never used inner classes in Ruby
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<dmonjo>
i want to access class3.<varables>.methods
<banister`sleep>
well if u want to be a pedantic dick abot it, a class it not a constant, it's just the variable that references it can be a "constant"
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<banister`sleep>
the only special relationship b/w a class and the constant that references it is the class adopts the name of that constant in its #name slot
<workmad3>
banister`sleep: a class is an instance of the class referenced by the Class constant ;)
<banister`sleep>
hehe
<workmad3>
although I do wonder if I should say 'semi-constant' for a ruby constant :)
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<banister`sleep>
the 'klass' slot of a class is actually first and foremost its metaclass, metaclasses are eagerly created for classes (not for normal objects though)
<banister`sleep>
workmad3: well IMO the 'const-ness' of a constant is the least interesting aspect of it
<banister`sleep>
it's more the scope rules that are interesting
<banister`sleep>
so it should have a totally different name
<workmad3>
a lexicle rather than a variable?
<workmad3>
lexiable?
<banister`sleep>
im not sure, it has pretty interesting properties
<banister`sleep>
lookup rules are a bit crazy
<workmad3>
:)
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<banister`sleep>
workmad3: does 2.0 excite u
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<Spooner_>
Though why you'd want to do that when you can just include a module, I don't know.
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<bean__>
^
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<ad_sd>
I have a string with hexadecimal values and I want to extract from the last \x80\x00\x00\00 to the \xff\xff\xff\xff. How can I do that ?
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<banister`sleep>
Mon_Ouie: 'alutte
<bean__>
ad_sd: probably with a regex / match
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<ad_sd>
bean__: hi :) precisely I was reading that
<ad_sd>
but doesn not find what I want :p
<bean__>
hmm, well if you pastebin / gist some code i bet someone would look at it
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<ad_sd>
bean__: yes of course
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<ad_sd>
bean__: thats the chain I want to parse. I have to find the last \x80\x00\x00\x00 and from that get everything until the first \xff\xff\xff\xff
<bean__>
you didnt need to PM it to me
<bean__>
posting it here would be fine
<bean__>
heh
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<ad_sd>
ah ok sorry
<bean__>
one ?, what ruby version are you on
* bean__
switches off 2.0.0 for now
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<dmonjo>
what is the difference of including a module in class OR a class in a module
<shevy>
hehe
<Pip>
So is Ruby 2.0 amazing?
<shevy>
dmonjo the namespaces are similar, but you can only include a module, not a class
<wmoxam>
Pip: yes
<Spooner_>
dmonjo, You can't include a class in a module.
<Pip>
Great
<Pip>
I know it won't let me down
<bean__>
2.0 is pretty good, it's still a pretty fresh release though
<shevy>
dmonjo with a class, you get access to .new which you won't with a module
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* Pip
goes to remove his Ruby 1.9
<dmonjo>
Spooner_: you cant include a class in a module?
<wmoxam>
Pip: my specs ran in about 40% less time
<dmonjo>
module A classA... ?
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<Spooner_>
You can't _include_ it. You can do that - that isn't INCLUDING.
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<dmonjo>
it is in it
<dmonjo>
what term do you use
<dmonjo>
inside?
<shevy>
spanking
<Spooner_>
include is a very specific term in Ruby, dmonjo
<dmonjo>
ok lol
<dmonjo>
spanking
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<shevy>
dmonjo well you can think of both a class and a module as namespaced containers
<dmonjo>
where can i read more about the namespace?
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<shevy>
there isn't much to read. module Foo; class Bar versus class Foo; module Bar, you would scope the same here, Foo::Bar
<shevy>
you can include Foo if it is a module, then you can omit the "Foo::", which you could not in the second example
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<dmonjo>
when you say namespace you mean the value of the current self?
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<shevy>
When I say namespace I mean ::
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<dmonjo>
memory where all the variables are defined
<dmonjo>
module::class! is one namespace module:class2 is nanother
<dmonjo>
everything inside class1 is in the same namespace
<Spooner_>
ad_sd, Did you sort out your regexp?
<ad_sd>
hi Spooner_ no, I'm reading in stackoverflow how I can do it :p
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<ad_sd>
Spooner_: thank you I'm gonna try
<ad_sd>
thank you so much, the problem was the hex
<ad_sd>
format
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<bean__>
yeah.
<bean__>
i see some Qs in there
<bean__>
qs are not in HEX
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<Spooner_>
That doesn't matter. It only wants to match whatever is inside delimiters which are in hex.
<ad_sd>
so something like "\x00\x00\xAA............\xAA\x01\x02\xFF\xFF" how do you get the string between the last \xAA and the first \xFF (\xAA\x01\x02\xFF)
* bean__
was running into encoding issues
<Spooner_>
Just as I said. Replace the ++ with "\x00\x00" or whatever. If it wants unicode, just use "\u00AB" for "\xAB"
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<ad_sd>
Spooner_: let me try it
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<Spooner_>
2.0 assumes UTF-8 (you have to ask for it in 1.9).
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<ninjanoise>
Howdy, anyone want to point me to a gem for doing sed like stuff to text in ruby?
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<Spooner_>
ad_sd you can convert utf to ascii 8-bit really easily in 2.0, which is nice (String#b).
<JonnieCache>
ninjanoise: what do you need that isnt built in to ruby?
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<Spooner_>
ninjanoise, Yeah, String#sub and String#gsub do it already.
<ninjanoise>
JonnieCache: I'm a ruby n00b lol so maybe I just need to look into text manipulation more
<JonnieCache>
ninjanoise: the ruby stdlib is very comprehensive. its one of the languages strengths
<ad_sd>
Spooner_: that por example this work .scan(/(?<=\x05\x00)(.*?)(?=\x01)/) but this .scan(/(?<=\x80\x00)(.*?)(?=\x01)/) doesn't
<ad_sd>
same with unicode
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<Spooner_>
mackwic, Don't ask. Just accept :$ You could argue that [4, 0] starts at the end of the array, but goes beyond it, but [5, 0] starts after the end in outer space.
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<Spooner_>
ad_sd, Odd. I'd expect that to be a misreading of the hex by the programmer...?
<ad_sd>
I guess so, thank you so much anyway
<mackwic>
Spooner_, ok, so there's always a special element beyond the end ? Seems that an important knowledge for scripting
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<Spooner_>
Not special as such. Just something you need to know...
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<Spooner_>
I mean not a special element. After all, you are asking for no elements.
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<mackwic>
the empty element could be a generic polymorphic element placed at the end of all arrays
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<Spooner_>
ad_sd, But it looks like it should work, looking at the dump you pastebinned. *shrugs*
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<mackwic>
that would be very clever for efficient end of arrays comparisons
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<Spooner_>
Not really. You are asking for [0, 1, 2, 3 <this>] compared to asking for [0, 1, 2, 3] <this>
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<mackwic>
yeah, no problem to admit the fact, was only thinking about consequences ;)
<Spooner_>
And, in general, there isn't a use-case for that. No reason at all to ask for a zero-length slice of an array really.
<mackwic>
I guess so
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<ad_sd>
Spooner_: it's strange
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<graft>
anyone ever work with Readline? I'm trying to muck with tab completion and i'm wondering if there's a nice way to pass the argument # into the proc (so i can tell whether i'm completing the first argument or the second argument, etc.)
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<shevy>
graft I use Readline a lot. I hate the API
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<foxnewsnetwork>
is it my imagination or did ruby 2.0 move RubyGems::Builder to RubyGems::Ext::Builder ?
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<mackwic>
oh btw, can someone advise me a good ruby shell ? The base interpretor is a bit harsh
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<mackwic>
ho
<mackwic>
so dumb
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<mackwic>
(i am)
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* Hanmac
mimes phinias: "yes, yes you are" :P
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<mackwic>
Hanmac, :p
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<zul__>
guys, I have a tweet message tw got from twitter gem, in detail the object tw is Twitter::tweet. After I do tw.to_s and I store the result into redis. When I try to get the message from redis I obtain a string, now I would like to cast it to a twitter object. Is it possible?
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<Spooner_>
zul__, Probably tweet = Twitter::Tweet.new(string), but reading the manual is probably best ;)
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<FilipNils>
just downloaded latest version, and it says "Ruby 2.0.0dev"…is this really latest?
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<sandstrom>
Is there something similar to `tap` that returns the value of the block?
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<Spooner_>
FilipNils, No, 2.0.0-p0 is latest.
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<canton7>
sandstrom, #map ?
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<Spooner_>
sandstrom, Might be clearer if you explain what you want to do with it.
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<havenn>
FilipNils: What'd you use to download Ruby?
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<FilipNils>
I used RVM
<havenn>
FilipNils: Update RVM: rvm get latest
<havenn>
FilipNils: Then: rvm list known
<FilipNils>
ok, thank you..I think i missed to do that, just updated brew
<swills>
bean__: yeah, i know, but i don't want to do that
<bean__>
swills: why not?
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<sebastianb>
Well, I need something more like project euler, I need an idea which I can turn into a program
<swills>
because i want it to be quick in new VMs, and easy to update
<Spooner_>
Or use just about any distro except CentOS.
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<bean__>
^
<bean__>
not sure why anyone would pick centos
<bean__>
but that's me
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<swills>
thanks for your help
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<bean__>
project euler is nice, sebastianb, i still have fun with it seeing how short I can write solutions for it
<Spooner_>
Recently I had problems helping someone for whom Ruby 1.8.5 was the latest version they had on their version of CentOS. Says a lot :)
<Spooner_>
sebastianb, ruby_warrior gem is excellent
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<swills>
i didn't choose centos...
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<sebastianb>
bean__: Yeah, but the thing with euler is that the solutions are just some short programs. I need some practice in building something bigger.
<sebastianb>
Spooner_: I'll check it out
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<bean__>
sebastianb: I'd suggest coming up with a problem that you want to solve :) What is something that annoys you?
<sebastianb>
My lack of patience
<sebastianb>
;)
<sebastianb>
but I guess it's not going to be solved by a ruby program
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<sebastianb>
The thing is that I want to start coding and stop reading books
<bean__>
Then start coding :)
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<bean__>
you could write an accounting program,. that keeps track of your expenses / money coming in.
<sebastianb>
bean__: That's why I'm looking for some program ideas ;)
* bean__
thinks about financial tech too much
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<mackwic>
sebastianb, try a problem >150 and we'll see if it's "only a short program" after all
<bean__>
^
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<mackwic>
I particularly think about problem when input is too large to be brute forced but ruby maybe lacks of perf for that...
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* mackwic
solve euler problems only to see the solution of the awesome x86 american guy
<aedornm>
Personally, I think a good starting point for a Ruby beginner is to build his own drone, code it to fly to <some restaurant> and pick up food. Obviously this should be doable by any first year programmer. /nod
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<mackwic>
aedornm, why flying ? You'll lose there pleasure of solving collisions ! Walking is definitely better
<atmosx>
hello
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<aedornm>
mackwic: If it was flying you'd still have to avoid collisions. And you'd have to really consider every axis - you don't want your drone to crash into the ground when trying to get food packed into it. Plus flying is faster, it would require more optimization!
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<mackwic>
aedornm, ok then. Perfect for beginners
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<aedornm>
I really dislike when I wrote something months ago, and now having to revisit it I can't figure out how it works. I'm having a senior moment!
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<Hanmac>
aedornm i thought it could be difficult to tell the drone that other persons are not "food" :P
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<maxamillion>
anyone have any clever tricks to find out why a function from a module isn't loading even though I've got 'include Thor::Actions' inside a class defined as 'class myClass < Thor' ?
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<aedornm>
Hanmac: That would simply be a minor inconvenience!
<Spooner_>
Hanmac, You can vet the persons for edibility when they get to your place.
<aedornm>
I'm being told by a large Russian that it's lunch time.... later!
<mackwic>
Does Ruby has an internal translator or what ? I can't see anyreason too associate :two with "dos" in this code
<Spooner_>
mackwic Well, it explains itself (and isn't very interesting).
<mackwic>
s/too/to/
<Mon_Ouie>
Hash.new("dos") <- that's where you decided it would be dos
<Spooner_>
Oh right, the constructor for Hash can take a default value for if the key given isn't in the Hash.
<Mon_Ouie>
It's Hash.new(default_value)
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<mackwic>
Aaaaah
<mackwic>
should've RTFM, sorry for that
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<v0n>
hi
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<v0n>
is there a way to get the exit code of an IO#popen call?
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<phinfonet>
Hi
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<jnewt>
came across a script written in ruby that i want to use / try. i installed ruby vi apt, and then did a gem install grit (apparently it's a dependency), and got a failed to build gem native extension followed by lots of undeclared errors. any quick answers to this?
<v0n>
jnewt: grit is a git wrapper, so maybe you need git development headers
<Spooner_>
Several possibilities. The gem doesn't support your Ruby version or you lack a dependency for the grit gem. Hard to tell without more info.
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<mackwic>
Is there a way to browse the rdoc in the cli, as a manpage / infotext / vimhelp ?
<mackwic>
or whatever
<Spooner_>
mackwic, Yeah, use pry
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<Spooner_>
Or use ri directly from the cli.
<Spooner_>
I mean use pry instead of irb.
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<jnewt>
v0n: requirements show git is the only one, nothing about devel headers. i have git installed.
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<jnewt>
ok, got it from a github source. i think i'm good
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<mackwic>
Spooner_, for example `>show-doc Hash` ?
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<Spooner_>
mackwic: show-doc Hash#initialize for the previous bit of wisdom
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<mackwic>
hmmm seems that I do not have the core doc
<Spooner_>
gem install pry-doc
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<Spooner_>
And you can use "ls Hash" to get a list of methods and whatnot.
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<mackwic>
Very nice ! thanks !
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<Spooner_>
mackwic, Try show-source Hash#initialize too :D
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<mackwic>
Spooner_, yeah sure ! :)
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<mackwic>
Spooner_, that's cryptic and unreadable :(
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<enroxorz-work>
ok, tricky question that probably isnt tricky. i have two strings that, if i concat, creates the name of a class. how do i call that class based off the names?
<k776>
Hello. I'm trying to parse some emails into a Rails app. That all works fine. The issue is encodings. Plain text emails work, but any weird characters (like \xBB) are causing a "PG::Error: ERROR: invalid byte sequence for encoding "UTF8"" error. I've tried str.encode('UTF-8'), and str.force_encoding('UTF-8') but they both return "ArgumentError: invalid byte sequence in UTF-8" :-( Anyone have any ideas?
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<enroxorz-work>
forget it, i figured it out.
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<realDAB>
ruby-2.0.0 is now on ruby-versions.net
<egghead>
anyone itc have experience with rbenv? I'm trying to install ruby on a box without the proper zlib stuff, so I have zlib installed into $HOME/opt, and have CONFIGURE_OPTS and RUBY_CONFIGURE_OPTS with zlib dir and opt dir pointing to my homes opt, but it doesn't seem 'rbenv install' is catching it, any ideas?
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<egghead>
(alternatively is there a rbenv chan I can go bug people in? :p )
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<havenwood>
egghead: There are #rvm and #chruby channels but nope, no #rbenv.
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<realDAB>
ruby-2.0.0 is now on ruby-versions.net, along with other rubies going back to ruby-1.0
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<havenwood>
egghead: Have you tried appending the `--with-zlib...` configure opt at the end of `rbenv install ...`?
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<havenwood>
egghead: I think that does work for ruby-build, not sure if rbenv passes on configure opts?
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<egghead>
thanks havenwood, ruby-build says it does, guess i'll just use rvm
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<havenwood>
egghead: Might take a look at chruby, as an alternative. Lighter than rbenv, maintained, no shims.
<enroxorz-work>
I changed it Spooner_. why is eval so bad?
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<phinfonet>
havenwood: i use rbenv, but i have a problem with gemsets
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<phinfonet>
sometimes it doesn't work
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<realDAB>
havenwood: not sure if that was a response to what i said about ruby-versions.net but if so, ruby-versions.net is unrelated to ruby-version
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<phinfonet>
and uses the global version
<Spooner_>
enroxorz-work, Lots of reasons. As you said, it is slow, but it is also unsafe (for example, if you get the name of the class from the user, then you need to filter it to ensure there isn't malicious code in it).
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<realDAB>
are there any ops here who can ban banjara?
<enroxorz-work>
Spooner_: ah. ok. this isn't a user facing script, but its better to get out of the habit of eval then. thanks.
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<realDAB>
havenwood: no, i'm just finding it annoying that his coming and going is making everything scroll up so fast
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<mackwic>
enroxorz-work, it's bad engineering practice to use anything that is named "eval" or "goto" in pretty much any language
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<Spooner_>
enroxorz-work, 99 times out of 100, it is possible to avoid eval, since Ruby is such an introspective language.
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<havenwood>
realDAB: Ahh, i disable those notifications so I didn't notice :P
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<enroxorz-work>
ok. i will stop using eval all together. used it in some older stuff from when i started with ruby, but those aren;t in use anymore. this is one of those rare cases where case/switch didnt make sense if Object.const_get was there (see! no more eval!)
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<lectrick>
i avoid eval at (almost) all costs.
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<lectrick>
you never know where user input creeps in
<phinfonet>
sorry ask it in here
<lectrick>
see: YAML :)
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<Spooner_>
Yeah, eval, goto and globals are all weapons of last resort, not first ;)
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<phinfonet>
but what you're think in create a gnome-shell plugin to show installed ruby versions on rbenv ?
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<Xeago>
Did I ever say I was stupid?
<Xeago>
build instructions in comments at top of file >.<
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<[diecast]>
can this warning be ignored? "/opt/puppet/vendor/bundle/ruby/1.8/gems/hiera-1.1.2/lib/hiera/backend.rb:95: warning: regexp has invalid interval"
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<Xeago>
[diecast]: I don't know what hiera is, I recommend looking at that line and figuring it out
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<[diecast]>
Xeago: looks like a validation - tdata.gsub!(/%\{(::)?#{var}\}/, val)
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<Xeago>
[diecast]: I have little to no experience with regex :<
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<[diecast]>
Xeago: thanks
<[diecast]>
i think i might have some info now from the google machine
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<gyre007>
can someone give me a hand with this...I have restarted one of the nodes...it came back up just fine, however sensu server is seeing it as down and keep alerting that it hasnt received any keepalives from it in past 5 minutes ?
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<gyre007>
sensu-client is running just fine and its receiving checks from server and sending responses back
<gyre007>
strange
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<gyre007>
is rabbit acting funny ? or sensu..mm
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<gyre007>
sensu-server logs are confirming what I'm seeing in Dashboard...
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<gyre007>
that server isnt' receiving keepalives...however server itself IS indeed receiving checks just fine and sending answers back to the server...
<gyre007>
strange
<Spooner_>
Ha, ODesk just told me I had to change my account name because they didn't believe it was real. Fricking idiots :D
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<gyre007>
restarting sensu-client solved the issue...
<gyre007>
mmm bug in sensu-client ?
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<bean__>
gyre007: i have no idea was sensu is.
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<gyre007>
arrgh wrong damn window ;-((((((((((
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<banisterfiend>
Spooner_: what is odesk
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<tommylommykins>
ooi
<tommylommykins>
how come in the documentation, instance methds are prepended by #
<tommylommykins>
as in string#split
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<tommylommykins>
why not string.split ?
<Spooner_>
Essentially, because they are.
<tommylommykins>
is it a notation inherited from smalltalk?
<tommylommykins>
or lisp?
<Spooner_>
String#split is an instance method. String.split would be a class method.
<Spooner_>
The former you'd call with "frog".split and the latter exactly with String.split
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<Spooner_>
Not sure where the notation comes from, I'm afraid.
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<dmonjo>
can we say a class method is like static method in java?
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<Spooner_>
You pretty much can, yes.
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<tzenes>
in ruby, is there a way to find all the references to an object given that object?
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<Spooner_>
tzenes, Nope, not unless you cycle through all objects and count references yourself.
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<dmonjo>
like processes for example that opened a specific file
<Mon_Ouie>
No. How would you represent those reference?
<dmonjo>
Spooner_: you mean all objects in the namespace?
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<tzenes>
Spooner_: I don't want to count I want to know who's holding on to the reference, but if I am willing to cycle through all objects, how do I figure out the relations?
<Spooner_>
No, all objects.
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<Mon_Ouie>
You have to write a methods that checks all the references of an object. There are likely a lot of edge cases.
<Mon_Ouie>
(All ivars; the contents of hashes, arrays, structs; if you include classes and singleton classes it can become very confusing)
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<dmonjo>
what does this mean class << self
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<indigestible>
local variables in procs may also hold references
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<indigestible>
dmonjo from there on you will be attaching methods on self
<indigestible>
well technically not self, but effectively the same thing
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<Mon_Ouie>
(btw, you can use equal? self instead of __id__ == id)
<Spooner_>
True, but anything else is a bit unlikely ;)
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<Mon_Ouie>
Arrays and hashes aren't that unlikely
<indigestible>
when you say that in a class definition, self is the class you are defining
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<Spooner_>
Mon_Ouie, Ta.
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<indigestible>
that means you will be attaching methods to your class,
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<indigestible>
so those methods will be class methods
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<reppard>
jello ruby people
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<dmonjo>
what a good example of a class method Math.sqrt?
<Spooner_>
That is a module method. Math is a module, not a class.
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<Spooner_>
But a module method acts the same as a class method (a Class is a special type of Module)
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<indigestible>
File.open
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<Spooner_>
Object.new
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<Spooner_>
(remember that Object.new calls Object#initialize)
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<Mon_Ouie>
Math.sqrt is even slightly trickier, because it's a module function
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<lectrick>
someone needs to integrate bitcoin with IRC via a bot like the bitcointip bot on Reddit
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<lectrick>
it's not as good as beering someone over the internet, but the next best thing
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<indigestible>
ok now I feel like we're bombarding the poor guy with superfluous details
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<indigestible>
including me of course
<indigestible>
better keep it simple
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<dmonjo>
learning ruby the hardway hehe
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<aedornm>
I learned Ruby by injection!
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<aedornm>
unit_models.all_key_paths.grep(/models/i).grep(/#{@serial_number[0..3]}/i).first.split('::')[0] ... I think it's missing something.
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<dmonjo>
.first returns the first result only ?
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<aedornm>
yes
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<aedornm>
Also, don't write code like that. Unless your goal is to torture your coworkers...
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<Spooner_>
lectrick, I've been asked for my paypal some someone can "beer me", but I've never accepted ;) Seems cheeky, somehow!
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<Spooner_>
lectrick, And, apparently, there is #bitcoin-otc on Freenode, but not entirely sure if that is actually something that helps you throw bitcoins about.
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<survili>
hi, I have a little problem in my script, calling a method whose definition comes later in the file. I get "undefined local variable or method `some_method' for main:Object (NameError)". As far as I remember, once I saw some sort of trick that allowed ruby forst to interpret the whole file and in last file call something like main method.. Can someone help me resolve this issue or remind me how this trick is done ?
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<Spooner_>
Put the "main" code at the end of the file.
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<Spooner_>
Or, as you suggest, make a main method at the top and call it at the end.
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<survili>
Spooner_, got ya! trying
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<Spooner_>
survili, Oh, you can also put END { your main code } at the top of the file, but that is sorta minging.
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<survili>
Spooner_, hmm, good to know. calling main at the end, works like a charm :) thanks again
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<dmonjo>
['hello.rb','world.rb','public.html'].grep(/(.*)\.rb/){$1} <<---- what is the role of the (.*) in the grep please?
<Spooner_>
dmonjo, Matches any character (.) any number of times(*). Look up Regexp - there is lots of magic there.
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<dmonjo>
{$!} to my understanding should return hello.rb not hello, how did we cut the .rb i nthis case?
<dmonjo>
if i print withotu the $1 it prints the hello.rb
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<Spooner_>
Yes, the $1 refers to the contents of the () captured by the regexp.
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<Spooner_>
Regular expressions are a large topic. You probably should do some research before you ask or we'll be here all night.