apeiros_ changed the topic of #ruby to: programming language || ruby-lang.org || Paste >3 lines of text in http://pastie.org || Rails is in #rubyonrails
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<Kovensky>
(btw, the xor with (2**32)-1 worked; probably because (2**32)-1 is a bignum itself and promotes any fixnum to bignum before running the xor)
<bananas>
hi! i'd like to get a fullname of a file. i only have the basename though... (the problem is the file can be x.jpeg, x.jpg, x.png,...) how can i get around this?
<xcyclist>
I'm not sure if that's what Boohbah wants. Obviously, I'm using rbenv.
<xcyclist>
My apologies for the length. It should have been a pastie.
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<bananas>
got it! Dir.glob('./path/' + base + '*')
<bananas>
not the cleanest...
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<Diranged>
can i make a ruby script exit quietly if a package is not loadable?
<Diranged>
ie… require 'foo' … if it errors out, exit super silently?
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<Prudhvi>
Diranged: it generates a LoadError, so you will have to handle that IMO
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<lectrick>
Is there any way I could pipe a string to a unix command and receive the output as a string, without first writing to a file and doing `command file1 file2`?
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<heftig>
lectrick: popen
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<girlself2>
hey
<Oog_>
i am forking to create new processes. i want the stdout of the children to go to the parent. how do i do this?
<girlself2>
that
<Oog_>
i tried mystudout = $stdout fork do $stdout.reopen(mystdout) end
<Oog_>
but that didnt seem to work...
<girlself2>
you
<girlself2>
hey
<girlself2>
how a treotyu guys a.l;?
<girlself2>
infer it
<girlself2>
does anmyone know some really advanced ruby?
<girlself2>
what is it in it?
<girlself2>
hi/
<girlself2>
hmm
<girlself2>
asd.asd.asd.asd
<girlself2>
hey
<girlself2>
it?
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<shevy>
girlself2 omg
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<nwertman>
Are there any coverage tools for ruby other than rcov? I've hit a spot where it falls over badly.
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<ozzloy>
i'm trying to get erb and rhtml files hilited in emacs. i have rinari installed and it shows the mode loaded when i open an erb file, but i get no syntax hiliting. how do i do get syntax hiliting?
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<Diranged>
is there a function in ruby for doing some kind of reproducible randomization
<Diranged>
ie.. if i have an array of 5 elements, and a server hostname "foo".. i want to do elemenum=rand(foo,5) and get a random number between 1 and 5.. every time, the same number..
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<becom33>
in this paste I get the output as 'Hello lol john' I also wanna get a output 'lol'removed from the output . how can I get a a word removed from a sentence ? http://pastie.org/3820742
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<becom33>
anyone ?
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<lenochka>
any idea how to run ruby script as a scheduled task in Windows?
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<rippa>
lenochka: schedule it in scheduler
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<xcyclist>
ls
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<Cork>
is there anyway to overide a class constant through extending it?
<Cork>
(the class)
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<rippa>
override?
<xcyclist>
Cork: You could use Class variable instead, with some kind of naming that implies they should be constant for each class. I seem to recall, since it's at some kind of mixin level, you cannot redefine an invariant in any inheritance for constants...???
<xcyclist>
I guess they use "immutable".
<Cork>
xcyclist: the problem its a rails actionpack lib
<Cork>
and its a broken regex i need to fix
<Cork>
and i would prefer to not have to monky patch it
<jaysern>
i'm having trouble with getting RVM to install 1.9.3 on my OS X 10.6 machine - it chokes on openssl, apparently: openssl_missing.h:71: error: conflicting types for ‘HMAC_CTX_copy’
<jaysern>
anyone solved this before?
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<fivetwentysix>
hello rubyists
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<xcyclist>
So, there is some evidence that my use of rbenv is breaking the must_be_silent method from minitest. Has anyone else heard of this happening?
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<shiroginne>
ohayo all
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<Boohbah>
oha!
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<lenochka>
rippa: that I heard of, but how do you do that?
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<senny>
is it possible to ignore the default internal encoding when reading in a file? I have an internal encoding of 'UTF-8' but I need to read a file in 'iso8859-1' and keep it in 'iso8859-1'. Is there a way to skip the transcoding to utf-8? When I supply 'r:iso8859-1:iso8859-1' when reading a file, it works but results in a warning.
<apeiros_>
File.read(path, encoding: 'whatever')
<apeiros_>
or File.open(path, 'rb:whatever') { …
<apeiros_>
see IO docs for more
<senny>
apeiros_: this does not work. since I set the default_internal encoding it automatically transcodes the contents to UTF-8
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<apeiros_>
oh, right, you're talking about internal encoding. hm, would have to consult the IO docs myself.
<senny>
apeiros_: i really went through the docs, even consulted "the ruby programming language" book but I cant find a better solution :S
<rippa>
try options hash
<rippa>
:internal_encoding Internal encoding for the IO. “-” is a synonym for the default internal encoding.
<rippa>
<rippa>
If the value is nil no conversion occurs.
<rippa>
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<luckyruby>
in my log file, i'm tracking xml request, http request, and http response, in that order using a uuid generated per transaction. Is there something better than uuid to accomplish the grouping of log messages?
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<senny>
rippa: amazing thanks!
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<lolmaus>
I would like to perform a `du` command and then obtain its result in a Ruby script. How do i do that?
<apeiros_>
exactly like that
<apeiros_>
result = `du`
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<apeiros_>
note that this only captures stdout, stderr will be directed to rubys stderr.
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<lolmaus>
Sorry, was offline
<lolmaus>
I would like to perform a `du` command and then obtain its result in a Ruby script. How do i do that?
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<apeiros_>
10:30 apeiros_: exactly like that
<apeiros_>
10:30 apeiros_: result = `du`
<apeiros_>
10:32 apeiros_: note that this only captures stdout, stderr will be directed to rubys stderr.
<Cork>
its stable enough for me to feel confy about it
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<neekfenwick>
very n00b question: i'm installing octopress on my linux fedora 16 system. needs 1.9.2, fedora only packages 1.8.x, so ok, http://www.ruby-lang.org/en/downloads/ says I should install from source. RVM can install for the current user, but I'm concerned how it seems to install to the user's home dir. If my user neek, and apache, both want to be able to run ruby, should I install as root?
<neekfenwick>
or perhaps i should do the rvm-installer as root, then use it to install a system-wide ruby, then neek and apache can both access ruby?
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<Cork>
neekfenwick: thats how i solved it
<Cork>
not sure if its the recomended way though
<roflmaus>
I'm writing a unit test and using `an_array.count`. This produces a error: ArgumentError: wrong number of arguments (at least 1) in `count'. WHYYY
<Cork>
if you install as root it installs in /usr/local/rvm/gems
<neekfenwick>
Cork, ok thanks. i stumbled through this on a VPS the other day, but now am on my own machine and dont want to screw it up :)
<Cork>
ya, i know the feeling
<Cork>
was a bit scary to migrate to rvm :)
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<neekfenwick>
when i even cd into my octopress directory now, i get "Using /home/neek/.rvm/gems/ruby-1.9.2-p318" echoed to the console. it's a bit scary. i've no idea what hooks it has inserted into my environment, and what multi-user concerns there are
<roflmaus>
Oh, i had an error in another place
<roflmaus>
IRB rocks. ^_^
<apeiros_>
pry rocks even more
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<Cork>
neekfenwick: .rvmrc
<Cork>
neekfenwick: when its found in a folter its executed
<neekfenwick>
i'm not familiar with that kind of auto-execute script. what's controlling that? .rvmrc has a single simple line
<Cork>
neekfenwick: its part of rvm
<Cork>
haven't checked how it does it
<neekfenwick>
i guess it's a bash thing of some sort
<Cork>
but if you move cross a folder with that file its executed
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<neekfenwick>
i just haven't seen a script auto execute due to cd before
<Cork>
its a simple bach like script
<neekfenwick>
doesn't even have the execute bit set
<Cork>
neekfenwick: the rvm installer explains this
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<Cork>
neekfenwick: scripts doens't need exec
<Cork>
only programs
<neekfenwick>
yes i know a fair bit about shbang, exec permissions, and what-not
<neekfenwick>
but e.g. when i cd into my home dir, why aren't all the files starting with '.' executed there too?
<Cork>
neekfenwick: cause theres a hook installed by rvm that looks explicitly for ".rvmrc"
<gener1c>
there are alot of ruby gems for mysql, i want to access my db with a script that will insert some stuff and then its going to be discarded, which lib would be suitable for that?
<gener1c>
just a one time update from a csv
<gener1c>
mysql/mysql2? something else?
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<roflmaus>
I'm trying to write a unit test that makes sure the class raises an exception on certain ocasion. I'm using `raise` to raise a error and `assert_raises` to check that it does. But instead of accepting/failing the test, it complains about the raised error. How do i do that correctly?
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<banister_>
roflmaus: you could always just rescue the exception and assert on the caught exception
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<roflmaus>
banister_, so all the exceptions tested should have resques? Otherwise you can't test them?
<banister_>
roflmaus: the testing library should have support for it, you haven't even said what testing lib your'e using :) but aside from the particular testing lib you're using, you could write a helper than wraps the begin/rescue of a piece of code and you could assert on the rescued exception
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<canton7>
I know, for instane, that in rspec you have to put a block around your exception-raising method, and pass that to an rspec method
<roflmaus>
banister_, i'm using minitest with Ruby 1.9.3.
<banister_>
roflmaus: in bacon we do this: lambda { code }.should.raise Blah
<roflmaus>
banister_, i was doing it wrong! Had put the tested block into where error type should be.
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<roflmaus>
banister_, now it works without rescues and wrappers ^_^
<banister_>
roflmaus: good
<anildigital_work>
Guys.. how to know how much CPU % is being used from Ruby?
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<roflmaus>
Is there a Minitest assertion like assert_not_raise?
<bigkevmcd>
roflmaus: just call the code, if it raises, it will cause the test to fail
<roflmaus>
bigkevmcd, kinda "assert(Foo.new)"?
<bigkevmcd>
roflmaus: should work
<bigkevmcd>
roflmaus: am not even sure you need assert() around it
<bigkevmcd>
roflmaus: if Foo.new raises an error, your test will fail...
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<roflmaus>
bigkevmcd, yeoup
<roflmaus>
THx
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<ksk>
hi
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<ksk>
im able to use "sting.match" go get matching stings - but how to get only the matching part?
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<asno>
hi all! Is anybody experienced with ruports?
<asno>
thanks!
<roflmaus>
ksk, what's the difference between "matching string" and "matching part"?
<ksk>
i want "grep -o" behaviour
<ksk>
uhm, nevermind. :)
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<ksk>
it just does what i want, just used the wrong regex
<ksk>
thanks
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<gener1c>
humz
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<hackbox>
hello everyone, anyone knows where to get good webrick tutorial?
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<Tasser>
what do you want to know?
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<hackbox>
webrick tutorial
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<Tasser>
hackbox, which part of webrick? you want to run it for a rack app and don't care about the internals? you want to mess with them?
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<hackbox>
mess with them, i will use it as server running on a particular port
<hackbox>
to accept incoming request to an underlying api providing a service
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<aszurom>
clear
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<aszurom>
apparently typing the / helps
<aszurom>
does ruby understand posix path shortcuts like ~/ or must I give a full path to a file I want to open?
<MarcWeber>
aszurom: I'm pretty sure there is File.expand or such.
<aszurom>
I'm embarking on my first ever lines of ruby code today, and the project I picked for it is opening a CSV file, totalling up the columns and finding the max and average of each column.
<aszurom>
looking at ruby-doc for csv, I see where I could do CSV.parse( ) either by row or into an array of arrays
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<aszurom>
CSV.foreach("path/to/file.csv")
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<aszurom>
if I did this in powershell, it would create an object for the CSV file's contents and it automatically knows what the row headers are and such. Not sure what I'm going to get with ruby
<workmad3>
aszurom: you can then access each header with row[:title]
<aszurom>
boy that sure doesn't look like perl :-)
<workmad3>
:)
<workmad3>
aszurom: do be careful with the headers in the CSV though, they need to be header1,header2,header3,... (i.e. no whitespace)
<aszurom>
so the :headers => true is a boolean test to see if the file object responds to the headers method?
<workmad3>
aszurom: no, it's a config option to the CSV.foreach method to say 'this CSV file has headers'
<aszurom>
I have no clue what that :stuff => does
<aszurom>
ok
<workmad3>
aszurom: it's a common ruby idiom for passing in things that look like named arguments (you'll understand what's actually happening as you learn more, but they're basically used as named parameters to methods :) )
<aszurom>
ok, makes sense
<workmad3>
aszurom: so in that case, you're saying 'this CSV file has headers, and convert headers to symbols' which is why you can do 'row[:foo]' rather than 'row["foo"]'
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<aszurom>
how would I incorporate apeiros's File.expan_path into that?
<aszurom>
let's say I'm going to pass the filename to the app when I invoke it on the command line
<aszurom>
ruby myapp.rb filename.csv
<aszurom>
can I do it like that?
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<hackbox>
yes then you access it with ruby constant ARGV
<hackbox>
ARGV holds an array
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<shevy>
and a baby
<shevy>
aszurom filename.csv would be contained in ARGV[0] in that example
<aszurom>
cool
<hackbox>
yes
<aszurom>
ugh. I attempted "gem install redcar" and it blew up. Gem uninstall redcar isn't letting me remove the partially installed thing. Is the common?
<Tasser>
aszurom, and the file object in ARGF[0]
<aszurom>
can I clean it up by hand?
<aszurom>
nevermind, I puzzled it out
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<aszurom>
just some rm -R fun
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<aszurom>
CSV is a built in class, right?
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<aszurom>
my oop terminology may be poor, since I don't do much other than some simple scripting and it's generally not object oriented
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<hackbox>
yes built in
<hackbox>
stdlib
<aszurom>
should it function in irb?
<hackbox>
yes using require it will
<shevy>
aszurom you can clean up by hand
<aszurom>
shevy, I got it already
<aszurom>
thanks
<shevy>
you learn quickly
<aszurom>
I couldn't get the automation to do it but it was plain enough once I went into the folder
<aszurom>
I'm a master deleter
<shevy>
I too
<aszurom>
rm -R /*
<shevy>
I removed /usr/include and thought I could recover
<shevy>
now I cant compile anything :(
<aszurom>
compilation is overrated anyway
<shevy>
aszurom I did that once, but with a misplaced tab completion expanding a long line with a / too
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<aszurom>
I haven't done it, but a sysadmin at my first job did. He was sitting next to me. I saw the "oh shi" look hit him
<aszurom>
hackbox, so at the irb prompt I should type "require CSV" or what?
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<aszurom>
I'm apparently doing it wrong
<shevy>
require always wants a string
<shevy>
when you do:
<shevy>
require CSV
<shevy>
you would try to require some constant
<shevy>
require 'csv'
<aszurom>
ah
<shevy>
should do... or 'fastercvs' or 'csv' I cant get it right
<hackbox>
yes
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<hackbox>
aszurom worked?
<aszurom>
amazing, it worked
<aszurom>
since the headers have spaces in some of them it looks like I'll have to address that by hand somehow
<aszurom>
so if I do var = CSV.read("file.csv") then var is now an array of the lines in the file. Is each item in var an array or list of the comma separated values that were on the line? Is there a difference in a list and an array in this case?
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<hackbox>
try var.each{|y| puts y} to be sure
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<aszurom>
I get the same output as if I'd said "puts var"
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<aszurom>
each row is "item", "item", "item"
<aszurom>
actually...
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<aszurom>
["item", "item", "item"]
<hackbox>
aszurom let csv process the file output(not too familiar with csv)
<hackbox>
there must be a method
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<aszurom>
is there a ruby ide that has enough autosense to be able to expand when I type something like File.ex? to expand that?
<aszurom>
Chocolat and Sublime Text don't do it
<aszurom>
is Rubymine that smart?
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<robacarp>
autocomplete is the debbil
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<hackbox>
get netbeans and install ruby plugin
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<gogiel>
aszurom: RubyMine is great tool. try it
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<aszurom>
yeah, I was just checking out rubymine over in the coder pit
<aszurom>
our dev team uses it
<tarelerulz>
What is the most complex program any of you have made in Ruby ?
<hackbox>
you will hear of mine when i'm done so far i have written over 2000 lines in ruby alone
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<robacarp>
what
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<shevy>
lol
<shevy>
hackbox that should not take long
<shevy>
tarelerulz, define "program"
<shevy>
a single standalone class that does not use any other class?
<shevy>
in that case, I suppose that is around 300 or 400 lines
<hackbox>
yeah but that's not the only thing i'm doing...
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<robacarp>
hackbox: I want to hear of yours now, what is it?
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<tarelerulz>
Could you make a calculator ?
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<hackbox>
i would have loved to but you know, business ethics will not allow me to
<robacarp>
tarelerulz: why are you asking these nonsensical questions?
<tarelerulz>
How would you chose what program language to start with?
<hackbox>
Thank You ALL, You all are nice cool guys have a nice time, i'm out
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<robacarp>
tarelerulz: as a brand new programmer?
<asumu>
Hi. I've been experimenting with yield and had a quick question about this code: http://pastebin.com/kdmRspVK
<asumu>
The code works as expected with the order of arguments in the block in useInject.
<shevy>
tarelerulz what kind of questions are that. you dont even give any feedback to us
<asumu>
But this order seems to be the reverse of the yield.
<asumu>
Is that how yield should work? (a few sources seem to say no)
<shevy>
I dont even know what is going on in that code asumu
<asumu>
shevy: useInject() should sum the even numbers from 1 to 1000.
<tarelerulz>
Well, I'm learn C++ and having hard time and I though I learned something else I could learn the basic concepts and learn a better language in the future
<shevy>
that is cool asumu which inject() are you using?
<shevy>
tarelerulz ruby is a lot easier than C++
<shevy>
you can learn ruby any time. C++ is harder, as is C.
<asumu>
shevy: there's a definition of inject() in the paste too, which is what I think I'm using.
<shevy>
asumu I see that there is a definition of inject(), the question is still whether you are using it or not
<shevy>
the only usage of an inject I see is this:
<shevy>
(1..1000).inject(0)
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<shevy>
and that is calling the inject method on a Range I suppose
<shevy>
class Range; def inject
<shevy>
(or wherever inject is defined, perhaps Enumerable.)
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<asumu>
shevy: Ah, I see. It's calling the built-in inject. That's my problem, I think. Thanks. :)
<shevy>
you should also consider changing the code with yield a bit
<shevy>
for instance, right now it always tries to yield
<shevy>
even when there is no block given to a method
<shevy>
call_my_method('bla')
<shevy>
vs
<shevy>
call_my_method('bla') { 'this is what I pass in the block' }
<shevy>
you can do something like:
<shevy>
yield(v, state) if block_given?
<shevy>
well
<shevy>
state would not be defined in that case
<shevy>
but I think your code returns nil if no block was given right now anyway
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<asumu>
I see, thanks. The code worked once I renamed inject to myInject to avoid the name clash.
<shevy>
hehe cool
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<robacarp>
blocks man. brilliant.
<netzapper>
I'm writing a dsl in ruby (a macro language for an assembler). Is there a good way for a DSL call like "foo(x, y, z)" to be converted to a ruby call like "foo(:x, :y, :z)"? Or is my best bet to intercept in method_missing?
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<any-key>
def foo(*arr); arr.map!(&:to_sym); end
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<netzapper>
any-key: that gives me "undefined local variable or method `x' for main:Object" in irb. Which is kind of to be expected, since it's going to try to bind 'x' before passing it as an argument.
<martman>
is there anyway to store a method's call, with its arguement and not execute it? just save it to a variable so it can be execuated later?
<martman>
i see .method does something like this
<martman>
but i dont think it can keep the arguments too
<netzapper>
martman: you can just keep them in an array. Like 'saved_call = [method, arga, argb, argc]'. Then you can call it with 'saved_call[0](*saved_call[1..-1])'.
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<martman>
netzapper awesome, ill try that
<martman>
thanks alot
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<Tasser>
netzapper, nope, you can't
<any-key>
netzapper: you wanted foo to process a series of symbols, right?
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<netzapper>
Tasser: I can't? Damn. Thought that worked.
<Tasser>
netzapper, ... the first one, at least
<Tasser>
you could, with the scope your method call in defining method_missing
<netzapper>
Tasser: yeah, that's what I thought I'd need to do.
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<Tasser>
netzapper, for any heavy macros, use lisp :-)
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<netzapper>
Tasser: it's already weird enough to write an assembler in ruby. I don't think added a lisp interpreter is a good idea.
<Tasser>
^^
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<Tasser>
or you could use ripper and parse the ruby yourself
<martman>
saved_call[0](*saved_call[1..-1])
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<martman>
gives me syntax error, unexpected '(', expecting $end netzapper
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<netzapper>
martman: oh, hell. It may be saved_call[0].call(). I don't remember. But, that basic idea should work.
<netzapper>
or some sort of nonsense with & operator or something.
<netzapper>
martman: no. Did you miss the function "run_saved_call". That has the syntax in it you need. Or, you can just call that function with your saved call arrray.
<Veejay>
Mon_Ouie: Yeah, it is neither useful nor efficient
<Veejay>
But I really like how it's more natural a style when coming from FP
<shevy>
that -> is so weird to see
<oooPaul>
shevy: I have code in this project that dynamically creates classes based on the contents of a WSDL... There's some pretty hairy abuse in there. ;)
<Veejay>
Ruby really is a neat language
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<oooPaul>
+1
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<cooler>
goof morning
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<SheikPunk>
hello guys.
<SheikPunk>
somebody can help me with an encoding string question?
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<shevy>
SheikPunk it is useless to ask to ask. people could say "yes" but what if they can not answer your question? you should ask your question directly, and then you will see whether someone can help or not
<SheikPunk>
shevy: thats ok… let me ask.
<SheikPunk>
shevy: I'm making some http requests like a web service. my request body is xml content and the web service response is xml too.
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<SheikPunk>
I'm using httparty for that.
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<SheikPunk>
so… the problem is… the response have some invalid chars… something like a encoding problem
<shevy>
you could try to force it into some encoding
<shevy>
like:
<shevy>
z = y.force_encoding("ASCII-8BIT")
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<minijupe>
Is there way to suppress deprecation warnings? I'm working on an old app that has a plugin causing deprecation warnings. I'd rather not change that plugin manually.
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<SheikPunk>
shevy: i think it not have big changes...
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<shevy>
minijupe perhaps modify $VERBOSE before loading that, and re-enable it again lateron
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<minijupe>
shevy: you mean before requiring the file? I think the parts of the plugin that are triggering the warning happen at runtime, not load time.
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<minijupe>
I'd also rather not disable all deprecation warnings, just the ones from that plugin.
<shevy>
hmm
<minijupe>
Is there a way to disable on a line by line basis?
<shevy>
I think there is not :(
<minijupe>
I think I remember other languages (like php, perl) have this feature.
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<SheikPunk>
shevy: so… i think that string already have the ascii encoding.
<SheikPunk>
shevy: but the invalid chars keep on string
<shevy>
well
<shevy>
this is the Encoding situation for ya
<shevy>
welcome to the evolution of ruby
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<shevy>
I am still on 1.8.7
<lectrick>
Why am I choking already this morning? No coffee yet I guess. How do I define a (lambda|proc|block), assign it to a variable, and then pass that block to a method which takes blocks?
<Mon_Ouie>
methhod(&block)
<SheikPunk>
shevy: hm… :(
<SheikPunk>
shevy: can i try another thing?
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<SheikPunk>
Iconv not works too.
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<shevy>
SheikPunk dunno
<shevy>
try to push the xml shit there into some thing that is valid
<SheikPunk>
shevy: hm… got confused? like what?
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<banseljaj>
hey shevy
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<banseljaj>
I hate Random
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<lectrick>
I can't assign a lambda to a constant??
<lectrick>
oh i was in an instance method. Is that why?
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<eph3meral>
what do I use to catch any and all errors/exceptions in a rescue blocK?
<eph3meral>
rescue RuntimeError => e ?
<eph3meral>
i thought just plain old rescue e would do it but that gives me a syntax error
<withnale>
How do I fix this? '`gem_original_require': no such file to load -- spec (LoadError)' when I type ruby -rubygems "require 'spec'"
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<rippa>
lectrick: yes, that was why
<lectrick>
rippa: I bought it. Moved to a class constant where it made more sense. Thanks.
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* lectrick
loves this fucking language.
<lectrick>
i'm still in the honeymoon phase after 5 years.
<lectrick>
Now if I could only find a girl like that.
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<bubz>
I'm using the ipaddress gem and am looking to be able to pass in an address like '10.1.2.3-10'. I'm finding this unsupported. I tried to instantiate with the .3 address alone and then the .10 address alone in order to somehow enumerate the between/difference or something, but I'm coming up short. Anybody have any ideas how to get all hosts with a hyphen range instead of /CIDR?
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<aszurom>
if I have an array with 10 elements, and I want to read and remove the first element, is there a "pop" in ruby?
<banseljaj>
Success. I can now genreate random statistical data.
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<rippa>
aszurom: pop removes last element
<rippa>
shift removes first
<aszurom>
banseljaj is ready to work for the government now
<banseljaj>
aszurom: I already dooooo.... :P
<aszurom>
random statistical data was a giveaway
<lectrick>
Anyone know what it means when a YAML.dump writes a value of something like "*id011" for a key?
<lectrick>
Is that the object_id of... something?
<aszurom>
I wish presidential candidates were like D&D characters, and we could just re-roll low wisdom scores until we get one we like
<lectrick>
aszurom: shift. If you want to do Ruby right, study the Array, Hash and Enumerable classes in detail. :)
<Veejay>
aszurom: head, *tail = *your_array
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<Veejay>
BOOM, head contains the head and tail contains the tail
<banseljaj>
aszurom: :D
<ged>
bubz: Or you can use any Enumerable method.
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<ged>
But that's using the 'ipaddr' library from 1.9.3.
<Veejay>
If the array contains only one element, head contains that element, and tail will be []. Now if the original array is empty, head will be nil and tail will be [].
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<Veejay>
Or shift, as previously mentioned
<davidcelis>
car/cdr
<banseljaj>
Hmm. What would be the best way to make a CSV file out of instances of a class?
<aszurom>
if the head eats the tail == ragnarok?
<banseljaj>
I want to make a CSV file output out of my RandomData class
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<davidcelis>
aszurom: You mean ouroboros?
<rippa>
also Jormungandr
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<bubz>
ged: Thanks! I gave up in ipaddr due to its limitation with enumerating hosts in a /cidr range. Looks like I'll need both for this current effort
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<davidcelis>
rippa: good catch
<ged>
bubz: what limitation does it have for CIDR ranges?
<ged>
And then the same thing as above from the Range...
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<bubz>
ged: I was unable to find that functionality in the docs. Thanks for pointing it out. Now I can be dependency-free for the time being. I'm fairly new to ruby so thanks for the guidance
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<ged>
bubz: Yeah, happy to help. :)
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<shevy>
long
<shevy>
live
<shevy>
ruby
<shevy>
!
<davidcelis>
mruby*
<davidcelis>
FTFY
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<lectrick>
We have a complicated rails app stack with an irreproducible bug and I'm trying to trace any changes to the request headers. (Asking here because #rubyonrails are noobs.) I was considering injecting a trace on the []= method on the request.headers object and filtering by what I'm looking for, is this a ludicrous idea or?
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<matti>
Vote Shevy!
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<LiquidInsect>
lectrick: you're trying to watch what's getting pushed in to the headers object and when?
<LiquidInsect>
sounds reasonable enough
<lectrick>
LiquidInsect: Yes. I'm trying to trace the setting (or mutating, unsetting etc.) of specific values (all values would probably be way too much info)
<shevy>
matti \o/
<LiquidInsect>
using pry or something similar, or just logging a trace each time?
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<wargasm>
yo. anyone familiar with using mechanize and handling cookies? i'm a scrub trying to automate something and on the last step of my script, i'm using POST to pass in some data, but getting redirected to a page that says "Your session has expired. Please go back and resubmit your data"
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<wargasm>
i'm assuming that the session id or whatever is triggering this is stored in the cookies and i need to pass that along with the rest of the form data?
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<LiquidInsect>
wargasm: I think all cookies you receive from the server should be sent back with every request
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<wargasm>
hm alright, thanks.
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<lectrick>
LiquidInsect: There are too many requests and this happens too rarely to use Pry. I'd have to log everything and discard uneventful traces. This understandably has a performance impact which I will have to watch carefully
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<Aristata1>
Can anyone tell me if this active record query syntax is correct? Person.all({:conditions => ["full_name like '%#{@term}%"]})
<daed>
no
<Aristata1>
drat
<Aristata1>
This is ActiveRecord 2.3.12 by the way
<daed>
Person.where('full_name LIKE ?', "%#{@term}%")
<daed>
something more like that
<daed>
oh
<daed>
oh man i haven't used 2.3 in so long i can't even remember
<Aristata1>
Yeah, no where or anything
<daed>
lordy lordy
<Aristata1>
You're tellin me :(
<daed>
i'm so glad my company makes a huge effort to keep all rails apps up to date
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<matti>
shevy: :)
<daed>
deploying a 3.0 to 3.2 release on monday
<Aristata1>
This i a very old customer, and they are back.
<Aristata1>
We can't afford to upgrade this project without them paying a LOT of money for it.
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<Aristata1>
It would probably be 100k + to upgrade
<daed>
where does one go for really old activerecord documentation?
<Aristata1>
I tried rubydoc but didn't have much luck
<daed>
that's the hidden cost of NOT updating though
<daed>
heh
<Mon_Ouie>
rubydoc keeps documentation for gems or you generate it yourself when you install the gem
<daed>
going to be harder as time goes on to keep it secure/extendable
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<Aristata1>
Unfortunantly I install everything with —no-rdoc --no-ri
<Aristata1>
:)
<Aristata1>
I am so awesome
<Aristata1>
I suppose I could unpack the beast
<Mon_Ouie>
I wonder why people do that — it makes it so much more inconvenient to browse the documentation
<eph3meral>
Mon_Ouie, unless, like me, you echo "gem: --no-rdoc --no-ri" >> ~/.gemrc
<eph3meral>
:)
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<eph3meral>
Mon_Ouie, actually I disagree, i prefer browsing the docs online
<eph3meral>
Mon_Ouie, mostly because rdoc/ri cause gems to take like a bazillion times longer to install
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<Aristata1>
Well if any of you were wondering. I KNOW YOU WHERE: this is correct: .all(:conditions => ["full_name LIKE ?", '%somwhtin%'])
<Mon_Ouie>
It installs them after the gem, you can start using the gem before it's done if you're in a rush
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<Mon_Ouie>
The main benefits are getting the documentation from ri and being able to access it even if you don't have an internet access for some reason
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<Aristata1>
Mon_Ouie: I am overly paranoid of one mp3 not fitting on my hardrive because of some rdoc
<Aristata1>
Plus, if I have no internet, I sure as hell am not working that day!
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<Mon_Ouie>
Not working ≠ not programming for me ;)
<Aristata1>
Not working = Enjoying some camping or hiking or bar time.
<Aristata1>
And waiting patiently until my sentence in this god awful chicagoland is over
<heftig>
but that means leaving the house :(
<Aristata1>
Anyone know why #ror is invite only all of the sudden?
<heftig>
it's not
<Aristata1>
Keeps telling me it is
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<heftig>
try registering with nickserv
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<Aristata1>
Wait
<Aristata1>
wtf
<Aristata1>
I am Aristata
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<Aristata1>
but it says its being used :(
<Aristata1>
That's probably why
<Aristata1>
Who the hell is using my nick
<heftig>
ghost?
<heftig>
try /msg nickserv identify nick password
<heftig>
then /msg nickserv ghost aristata
<heftig>
followed by /nick Aristata
<minijupe>
shevy: Found a rails solution: ActiveSupport::Deprecation.silence do end
<Aristata1>
Hrm
<Aristata1>
Says Aristata is being used.
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<Aristata1>
AND Aristata!
<Aristata1>
1
<heftig>
you need to ghost it first
<Aristata1>
Lame
<Aristata1>
How do I do that?
<heftig>
i just told you
<matti>
Mon_Ouie: O, hai :)
<heftig>
ask nickserv to identify, ghost, then nickchange
<Mon_Ouie>
matti: 'alut ;)
<Aristata1>
notice) You may not ghost Aristata.
<Aristata1>
2:18
<Aristata1>
(notice) You may not ghost aristata.
<heftig>
did you identify?
<Aristata1>
yeah a long long time ago
<heftig>
you're not identified right now
<Aristata1>
hmm
<heftig>
do /msg nickserv identify aristata <password>
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<Mon_Ouie>
You can add the password as another argument to the ghost command
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<Aristata1>
hmm
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<Aristata1>
Says I am logged in as aristata
<Aristata1>
whatever
<Aristata1>
maybe I messed something up on my home comp
<Aristata1>
If I am logged in there am I unable to log in elsewhere?
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<freakeasy>
hmm
<freakeasy>
I like this nick way better anyway
<freakeasy>
thanks heftig
<freakeasy>
You have to promise never to let anyone know freakeasy and aristata are the same person, or there will be a ww 3
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<barraponto>
194 is givin me issues with ssl :/
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<barraponto>
rubygems redirects me to cloudfront and i get handshake failures :/
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<td123>
barraponto: check out the release notes, the biggest changes were related to ssl
<barraponto>
yeah.
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<w1mark>
how do you run scripts in ruby? Im trying to just make a .txt/.rb file and run it through the interactive ruby cmd prompt.
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<wargasm>
ruby nameofscript.rb in shell
<w1mark>
thanks, I think it works, but my file just made a function instead of actually executing anything oops.
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<w1mark>
yay it works... thanks
<w1mark>
so, do you need to make a main function in ruby...?
<w1mark>
or do you just execute code after your function definitions?
<ozzloy>
w1mark, stuff at the top level gets executed
<ozzloy>
w1mark, so you don't need a main
<ozzloy>
w1mark, for example if you make a file with just "puts 'hello world!'" it print out hello world!
<w1mark>
yea, I just noticed that.
<lectrick>
Can anyone fix my deep hash traversal method here? https://gist.github.com/2431329 There's a failing test and everything. Thanks in advance. Anyone good at recursion and end conditions would beat it in 2 seconds probably.
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<w1mark>
didn't really understand when you said top level though
<w1mark>
but I guess it executes code as long as it's not a in a function definition
<workmad3>
w1mark: the top level is code that isn't inside class, module, method definitions, etc
<workmad3>
w1mark: e.g. stuff 'at the top' :)
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<w1mark>
ah ok, that's what I was guessing, but I didn't know the terminolgy
<w1mark>
horrible spelling for the win.
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<gener1c>
mysql2 ftw
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<w1mark>
hmmm, reading in a file seems simple enough...
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<lectrick>
OK I got my tests passing but I don't like my traverse code :/
<lectrick>
i have to say i feel like i just finished a half-mental-marathon
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<lectrick>
i mean look at the crap i started with
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<lectrick>
and that was even an improvement on the original code someone wrote, which had a fail condition
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<lectrick>
so I covered it with a test and then turned that bitch ass into a 1 liner
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<w1mark>
how would you read in a tab/space seperated list one item at a time?
<w1mark>
read in a .txt file*
<robacarp>
read in each line, split by /\w/ or something
<burgestrand>
w1mark: depends, can any items contain tabs or spaces?
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<w1mark>
um, lets say spaces.
<w1mark>
er
<w1mark>
I mean tabs
<burgestrand>
w1mark: no, can any *items* contain tabs or spaces, wether they’re separated by either one does not matter too much
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<w1mark>
I basically have a names text file.
<w1mark>
each line has a first name, followed by a tab for the last name.
<w1mark>
I basically just want to throw the names.txt file into a parallel array.
<w1mark>
two parrallel arrays*
<burgestrand>
w1mark: so then that’s a no, first names cannot contain tabs?
<burgestrand>
would be fun to legally change your name to include a tab character
<w1mark>
first names don't have tabs or spaces.
<w1mark>
I would use the readline function, but I need to sort the file by last name.
<w1mark>
which is why im trying to create a parallel array.
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<w1mark>
ah, the second name is followed by a tab too.
<w1mark>
last name*
<w1mark>
oops.
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<shadoi>
w1mark: some reason not to use a hash instead of paired arrays?
<w1mark>
I just thought it would be easier.
<w1mark>
Just picked up ruby recently.
<shadoi>
hashes are usually easier to work with
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<shadoi>
they just take up more memory
<w1mark>
Im more experienced with c++ which I use arrays most often.
<w1mark>
don't really have any experience with hashes.
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<w1mark>
so how would you use a hash then?
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<horofox>
how do i add an element to the beginning of an array?
<shadoi>
horofox: unshift
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<shadoi>
w1mark: basically you create a "person" hash, with hash keys as attributes of that persion (like first_name, last_name, jerkyness, etc.)
<shadoi>
w1mark: associative array basically.
<horofox>
shadoi: ty
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<w1mark>
so basically a struct/class?
<shadoi>
w1mark: lighter weight than a struct or class
<w1mark>
ok
<shadoi>
w1mark: w1mark: h = {}; File.read('names.txt').each {|line| h.fetch(line.split)}
<shadoi>
oops, autocomplete fail
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<oooPaul>
Hash just maps a key to a value. A class may also have methods defined and bound to the object.
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<w1mark>
; is just the line ender character right?
<rippa>
yes
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<w1mark>
im getting an error that the "each" method isn't defined.
<shevy>
w1mark you make something wrong then
<Hunner>
w1mark: are you calling it with . on an object?
<shevy>
w1mark, show code that fails for you at pastie.org so that others can look where the error is
<shadoi>
w1mark: sorry, probably each_line
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<shadoi>
or lines
<rexbutler>
Is there a web design or ajax or javascript channel on freenode?
<rexbutler>
answer: yes
<shadoi>
grats...?
<rexbutler>
A particular channel about web design... hmm?
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<shevy>
lol
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<Spaceghostc2c>
#freenode would have a better idea. there's always /list
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<eph3meral>
rexbutler, #web ?
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<dbgster>
as long as I have a Gemfile, I can call bundle?
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<dbgster>
I' ran bundle but I get this on my server: bundle: command not found
<dbgster>
and I have installed bundler
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<Spaceghostc2c>
dbgster: Using rvm?
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<dbgster>
Spaceghostc2c: no
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<Spaceghostc2c>
Oh.
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<ipnosi77>
ciao
<ipnosi77>
!list
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<w1mark>
how would you create a file and add text to it?
<w1mark>
create/edit
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<Spaceghostc2c>
With documentation guiding the way.
<kallisti>
what's a good tutorial for someone who's already familiar with programming in a variety of languages?
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<matled>
kallisti: I personally really enjoyed the "ruby crystallized" chapter from pickaxe
<kallisti>
I guess I'm mostly looking for a walkthrough of the standard libraries and maybe some standard idioms, since I'm familiar with the syntax.
<kallisti>
I'll check that out.
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<n00by>
is it possible to convert hash or array to function argument list?
<heftig>
n00by: foo(*arr)
<kallisti>
is there something like __name__ == "__main__" (from Python) in Ruby?
<n00by>
heftig, thanx a lot, I knew it was damn simple!!!
<heftig>
kallisti: $0 == __FILE__
<kallisti>
ah
<kallisti>
__FILE__ is the current module name, $0 is the same as in bash/perl
<heftig>
i assume you want to test if the user launched your script directly
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<kallisti>
yes
<heftig>
right.
<kallisti>
I can already piece together most of what Ruby code means, the trick is just getting everything down so that I can do it intuitively.
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<kallisti>
classes in Ruby do a lot of stuff..
<kallisti>
well, I'm looking at File right now. there's a lot of different libraries stuck together in one place.
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<kallisti>
I'm looking for a "with file" construct, where a finalizer is called at the end of my block of code. Does that exist?
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<pplask>
hi guys
<kallisti>
hey
<pplask>
I am having problems starting unicorn, can I ask questions about it on this channel?
<banisterfiend>
kallisti: File.open {}
<kallisti>
ah nice.
<lectrick>
kalleth: File.read will auto-close a file and read it in one command. File.write, which only exists on the latest release of Ruby, will do the same for writes.
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<kallisti>
eh I'd rather use constant memory.
<lectrick>
kalleth: For writes on rubies < 1.9.3 you still have to do File.open(filepath, 'w'){|f| f.write(bigstring)}
<kallisti>
lectrick: yes, reading the file into memory is less efficient than reading one line at a time.
<kallisti>
in this case it likely doesn't matter.
<kalleth>
lectrick: you mean kallisti
<kalleth>
;p
<kalleth>
i thought someone actually wanted to talk to me then ¬_¬
<lectrick>
omg can you guys sort out your names lol. too similar
<lectrick>
kallisti: ^
<kallisti>
nope
<kalleth>
i've had it longer
<kalleth>
guarantee
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<kalleth>
'96, i think
<kalleth>
maybe 98
* kallisti
doesn't care. :P
<lectrick>
I haven't had to worry about memory usage when reading files with ruby yet so I'd have to see what is actually more efficient. File.open(file).each should do line by line or perhaps each_line
<kallisti>
lectrick: unless it's a lazy string it would have to be less efficient.
<kallisti>
yes that would be good.
<kallisti>
lectrick: is that not File::open(file) ?
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<lectrick>
kallisti: Well, if you give that file handle a block, it gets the file handle, and then you can read it however you wish. all at once with f.read or in a different fashion
<lectrick>
I'd have to check the File object to be sure
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<kallisti>
so File has an each method? I'm not seeing it anywhere in the docs.
<kallisti>
does Ruby inherit Perl's global variables?
<LiquidInsect>
take sa separator as it argument
<kallisti>
ah
<kallisti>
oh and it defaults to $/
<kallisti>
okay
<LiquidInsect>
and &/ is "\n"
<LiquidInsect>
er
<lectrick>
maybe it defaults to \n for IO objects, I would imagine at least, because nil doesn't make much sense (unless you want to read each character separately I guess, but then is it reading a byte or..?)
<LiquidInsect>
$/
<LiquidInsect>
lectrick: it does
<lectrick>
kallisti: Ruby took Perl's globals, yes
<lectrick>
FYI there are usually more human-friendly/readable equivalents to the Perl globals
<lectrick>
like there is $LOAD_PATH instead of/in addition to $:
<kallisti>
hm I installed ruby in Debian but there's no rb command.
<lectrick>
it's "ruby"
<kallisti>
oh
* kallisti
should stop asking dumb questions. :P
<lectrick>
the command interpreter or whatever is IRB
<shevy>
kallisti debian hates ruby
<lectrick>
command "irb"
<lectrick>
you can always alias it to rb haha
<shevy>
I did that :>
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<kallisti>
hm foreach doesn't appear to be a method of File
<lectrick>
it's on IO
<lectrick>
so File gets it
<lectrick>
The docs typically don't show inherited methods
<shevy>
kallisti foreach is not needed really
<LiquidInsect>
actually I think it's in Enumerable
<kallisti>
no I mean I'm getting a runtime error.
<shevy>
your_array.each
<LiquidInsect>
foreach and for use each
<lectrick>
hrmm
<shevy>
no please ignore anything that has "for" in ruby code
<LiquidInsect>
haha
<lectrick>
lol
<LiquidInsect>
shevy: I started a project with a friend of mine who works at Microsoft
<kallisti>
I guess I'm using Ruby anyway. I have no need to be concerned about memory efficiency. :P
<lectrick>
OK so what is the canonical way to read a file line by line with a line separator of "\n"?
<LiquidInsect>
He just took off and started writing code
<LiquidInsect>
so many for loops
<LiquidInsect>
I have to teach him idiomatic ruby
* kallisti
comes from Haskell, and already knows a little about some of Ruby's higher-order functions.
<lectrick>
for loops = old thinking
<shevy>
LiquidInsect he writes for loops in ruby?
<LiquidInsect>
shevy: he'd never used ruby before
<lectrick>
well, ruby will let you
<shevy>
lectrick File.readlines('foo.txt')
<LiquidInsect>
so yeah, there was a lot of for thing in things do; whatever; end;
<shevy>
ewww
<LiquidInsect>
(or however the for syntax works, I for get)
<lectrick>
ruby's like, hey, if you really want to write procedural code, I'll let you. If you want to write functional code, I'll let you. It's chill, man. Happy 4/20
<shevy>
I have some old ruby code from other people who used that a lot
<shevy>
for x in z
<shevy>
for a in b
<lectrick>
shevy: No, if you want to read the file one line at a time without reading the whole thing at once I mean
<shevy>
lectrick ah
<shevy>
hmm
<kallisti>
I guess I'll just load the whole file into memory since it's not large enough for that to really matter. Still I'd like to know how to do it line-by-line.
<shevy>
I think you will need to somehow use File.read and tell it to read in at newlines
<lectrick>
kallisti: Me too, now.
<kallisti>
do I get $_ in Ruby?
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<lectrick>
Looks like readfilehandle.gets will do it
<lectrick>
kallisti: ^
<lectrick>
kallisti: Yes you do, but I wouldn't recommend using it
<kallisti>
well I'm mostly interested in using it with regex.
<shevy>
what is $_ again?
<kallisti>
and.. coming from Perl, I find $_ perfectly readable. :P
<banisterfiend>
LiquidInsect: btw the new pry can retrieve docs and source for classes/modules now. What do u think?
<kallisti>
$_ is "a current value"
<shevy>
not sure I understand
<kallisti>
that is used as a default in some places in Perl.
<lectrick>
LiquidInsect: I'm not sure. It depends on if .each on a file assumes that file already read the entire file into memory.
<shevy>
and what rules set it?
<LiquidInsect>
banisterfiend: nice. I need to learn pry myself, I keep finding myself using ruby-debug still
<kallisti>
shevy: are you asking rhetorical questions or do you actually know how $_ works?
* kallisti
can't tell.
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<shevy>
kallisti I am asking what $_ does
<banisterfiend>
LiquidInsect: well pry is more of an exploration tool/spelunker than a bona fide debugger, but it's slower gaining debugger capabilities too
<shevy>
"$_ $LAST_READ_LINE[1] The last input line of string by gets or readline."
<lectrick>
$_$LAST_READ_LINE[1]The last input line of string by gets or readline.
<kallisti>
shevy: it's just a global placeholder value. In Perl, various operations read from and set it automatically if you don't specify values. I'm guessing it works similarly in Ruby. For example, in Perl, if you specify a regex without using =~ it will automatically match on $_
<lectrick>
lol
<kallisti>
this is very handy for quick scripts.
<shevy>
thanks lectrick
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<kallisti>
oh found what I'm looking for
<kallisti>
IO.lines
<LiquidInsect>
kallisti: that's the name method as each
<LiquidInsect>
according to the docs
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<kallisti>
oh, right.
<LiquidInsect>
unless the internal implementation differs
<lectrick>
the same method he means
<lectrick>
File.each might defer to IO.lines
<LiquidInsect>
File.each doesn't exist
<kallisti>
hm it actually seems to work differently.
<shevy>
seems $LAST_READ_LINE is an alias to whatever is read in by .gets
<shevy>
oops, forgot .chomp
* kallisti
thinks readability is a meaningless concept.
<kallisti>
anyone who knows Perl can read Perl code that makes heavy use of $_
<kallisti>
because it's so idiomatic.
<shevy>
kallisti completely wrong
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<lectrick>
As much as I love to study and work with code, I'm convinced that the longer I inhale it, the less humane I become. I can feel it affecting my brain.
<shevy>
your brain will adapt to everything anyway given sufficient training, but the worse language is like a small hammer - you are less likely to finish a huge bridge with a small hammer
<lectrick>
kallisti: heh here we go with philosophy. I think that you will find ruby extremely readable as well as concise, regardless of obfuscation.
<shevy>
I failed to write an IRC bot in PHP. A few months later my IRC bot in ruby worked
<kallisti>
yes, expressivity is more important than readability.
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<kallisti>
small hammer = non-expressive language
<shevy>
I think you are still stuck in the perl mindset
<kallisti>
nah. I have no programming specific mindset
<kallisti>
if I did it would be Haskell.
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<kallisti>
do you pass a "self" as the first argument of an instance method called with the # syntax?
* kallisti
is just guessing.
<shevy>
self is always available so it makes no real sense to pass it to any method
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<kallisti>
no I mean like
<shevy>
objects in ruby are smarter than in python
<kallisti>
File#each(instance, ...)
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<kallisti>
I understand you can do instance.each, and within the class just each
<kallisti>
er, within a method of the class I should say
<shevy>
class Foo; def bar then later ... x = Foo.new; x.bar <-- you call the method #bar on the object x
<kallisti>
oh
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<adamkittelson>
i think # is just a shorthand way of saying you're dealing with an instance method as opposed to a class method, it's not actual syntax
<kallisti>
so . is /calling/ the method, and # is its name.
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<kallisti>
oh..
<kallisti>
okay.
<lectrick>
kallisti: You don't use # in actual code. Class#instance_method is a way to talk about instance methods in chat channels.
<kallisti>
ah I see.
<lectrick>
kallisti: Actual code would do c = Class.new; c.instance_method
<canton7>
aye. It's presented in the docs that way
<shevy>
you should be able to lookup documentation via ria that way... 'ri Hash#values_at' for instance ... unless I am wrong. Have not used ri in a long time
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<lectrick>
Yes, I believe so
<shevy>
someone try? :)
<lectrick>
So if I type #each, everyone knows I'm talking about an instance method,.
<lectrick>
in docs and irc.
<lectrick>
(is there something like that for class methods?
<shevy>
hmm how do you lookup where #each resides?
<lectrick>
Hash::each
<shevy>
from commandline
<kallisti>
File#gets appears to be valid code.
<kallisti>
are you guys sure?
<shevy>
no, where do you get this information?
<kallisti>
irb
<shevy>
hmm
<lectrick>
kallisti: # makes ruby ignore the rest of the line. It's a comment character LOL
<shevy>
nah
<kallisti>
oh, right.
<shevy>
I think irb ignores that
<lectrick>
yep
* kallisti
is silly.
<lectrick>
hence comment character
<shevy>
so you just typed "File" in IRB in actual practice
<lectrick>
yep
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<ReachingFarr>
I would like to remove a class's :new method. Does anyone know how to do that?
<shevy>
remove_method :new
<kallisti>
can I use regex in case expressions as I would in Perl?
<kallisti>
case val when /regex/ ...
<kallisti>
the case succeeds if the regex matches val
<ReachingFarr>
shevy: I'm getting an error when I try that: `remove_method': method `new' not defined in Bar (NameError)
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<shevy>
yeah I think it is somewhere else... in Object perhaps
<shevy>
or not hmm
<shevy>
kallisti yes but make a newline after "case val"
<kallisti>
right
<shevy>
ReachingFarr well it is not in Object either
<ReachingFarr>
Oh, so you have to remove it from the class it was defined in? That would mean then that I would make it impossible to call :new on any class, right?
<shevy>
perhaps new is special? I think I once read that it calls ... #allocate
<shevy>
dunno really. but every class in ruby needs #new
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<shevy>
ReachingFarr, I am sure Mon_Ouie will know :)
<ReachingFarr>
Right, and I don't want to remove it from something that everything inherits from. I just want to prevent new from being called on a specific class.
<shevy>
yeah
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<shevy>
you want to remove the ability of any given class to get instantiated (or rather that #new is called on it)
<shevy>
I dont think I have read that wish before btw
<kallisti>
shevy: and case is just calls of === right?
<ReachingFarr>
shevy: I'm trying to implement an AbstractClass module.
<shevy>
kallisti yeah I think so
<shevy>
ReachingFarr will we ever find out? :)
<ReachingFarr>
shevy: If I find a better way of doing it I'll post a link to the code if people are interested.
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<kallisti>
is it more idiomatic to use the $n capture variables, or to use MatchData (from regular expressions)?
<kallisti>
I'm guessing MatchData
<kallisti>
since it's not the Perl one. :P
<kallisti>
actually I'm assuming global capture variables exist.
<kallisti>
they might not.
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<kallisti>
hm I don't see them documented so maybe they don't.
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<shadoi>
they're not global, but they exist in scope
<shadoi>
khakimov: yeah with redis you basically just pop each URL off as your workers process it, so if something fails it just keeps going. Have your works update redis with results and you can feed it any # of sites to crawl.
<shadoi>
s/works/workers/
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<khakimov>
shadoi: make sense, going to try
<khakimov>
shadoi: thanks
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<lectrick>
How do I test if an instance is a kind of parent class where parent class is a few levels up?
<lectrick>
I tried is_a? but this seems to not work all the time
<kallisti>
maybe the list assignment tries multiple methods?
<kallisti>
Enumerable or [] or ...
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<heftig>
no
<heftig>
it only treats a single array specially
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<ashp>
I hate to just stumble in and ask a question but: If I have a string "AA:BB:CC" and I wanted to .split(':') - how could I do this as a hash instead. I basically want to make a hash with a=>AA, b=>BB, c=>CC?
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<ashp>
It's probably a dumb question but I couldn't think of a good way to do it
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<Davide>
!list
<kallisti>
heftig: the code I pased above seems to working as is
<kallisti>
*pasted
<shevy>
ashp well
<heftig>
kallisti: it just assigns the MatchData to nick here
<heftig>
msg is nil
<kallisti>
oh okay.
<kallisti>
yeah I only tested nick
<ashp>
shevy: Perhaps I could just do: a, b,c = "string".split
<ashp>
and then make a hash out of those, it seems less elegant
<kallisti>
nick, msg = /^\[.+\] <(.+)> (.+)$/.match(line).captures # this works, and is a bit clearer than using *
<kallisti>
heftig: can you explain how msg becoms nil?
<shevy>
ah heftig is better
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<heftig>
kallisti: /foo/.match("foo") returns a MatchData object
<heftig>
that object gets assigned to nick, and msg stays nil
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<kallisti>
right
<kallisti>
I meant: why?
<kallisti>
what are the semantics of that style of assignment
<heftig>
because you're trying to assign one element to two, the unassigned ones become nil
<kallisti>
so that's just "how it works"
<kallisti>
got it.
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<kallisti>
(for example, in Perl evaluating a scalar in list context produces a list of size 1, thus only the first variable is assigned to)
<heftig>
the only special cases are: if there's only a single element on the left side, it becomes an array of all the right-side elements
<heftig>
if there's only a single element on the right side, and it's an array, it is expanded
<kallisti>
so in the one-element case it sort of implicitly treats it as a length-1 array.
<heftig>
huh?
<kallisti>
a,b = not_an_array
<heftig>
a = not_an_array, b = nil
<kallisti>
I understand what happens
<kallisti>
but not how that's not just some kind of weird special case.
<heftig>
nothing gets treated as a length-1 array
<heftig>
not a special case at all
<kallisti>
a,b = [not_an_array]
<kallisti>
same thing, right?
<heftig>
yes, but now you're invoking the special case
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<kallisti>
whut
<shadoi>
a, b = [you_will_be_mad]
<jaysern>
I'm error'ing out on this line when I try to do a gem install of libarchive. Has anyone dealt with this before? checking for archive.h... no *** extconf.rb failed ***Could not create Makefile due to some reason, probably lack ofnecessary libraries and/or headers. Check the mkmf.log file for moredetails. You may need configuration options. http://pastie.org/3825735