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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<digitalcakestudi>
thanks
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<theRoUS>
or even 'gem install --version "< 3.7" rdoc' -- it still installs 3.7. and considering i'm on ruby 1.8.7, it gets a 'undefined method `absolute_name' for nil:NilClass' error
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<macmartine>
what's the best way to pass the individual elements of an array as arguments in a method call? like https://gist.github.com/2847811
<samuelkadolph>
macmartine: foo(*[1,2])
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<macmartine>
samuelkadolph: how does that translate to my example? foo(*rw) ?
<samuelkadolph>
Try it
<macmartine>
i did. didn't work
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<samuelkadolph>
Well that's how it works. So either your method is wrong or rw isn't an array.
<samuelkadolph>
gist the error you are getting or your actual code if there is no error
<macmartine>
oh, crap, it did :) thanks. i was trying it at a breakpoint, oncorrectly
<macmartine>
*incorrectly
<macmartine>
I tried *rw and expected it to "explode" the array, but it just threw an error
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<macmartine>
seems like 'puts *rw' would work too
<samuelkadolph>
puts recursively puts arrays, so there would be no difference
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<dekz>
Anyone know of a way to parse a HTTP request and then make the request. Ie parse a known request (including headers) from a text file and then executing it?
<dekz>
and by a way I mean a nice way
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<MekkisScreen>
is there a module that parses the string given by a HTTP GET request and presents an unencapsulated string?
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<jrajav>
MekkisScreen: The #body of an HTTPResponse?
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<recrusive>
i have built ruby on freebsd as well as sqlite3, on my local freebsd, i issued a gem install sqlite3 and it worked, on the other box, i did the same and received a sqlite3.h not found, upon investigation it is located at /usr/local/include/sqlite3.h, how would i check to see why the libraries and headers are not being loaded properly to the compiler?
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<bnagy>
is us rlocal include in your path?
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<recrusive>
bnagy: no
<recrusive>
it is as if the compiler is not using -I/usr/local/include
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<bnagy>
well it should provide a log, no?
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<swankier>
how do I make a ruby regexp match multiple times? I'm using "www.domain.com".sub(%r[\.],"\\.") almost correct except for the fact that it only matches the first .
<bnagy>
gsub
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<swankier>
wow...
<swankier>
that was exactly what I needed.
<swankier>
thank you.
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<bnagy>
np
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<nat2610>
hi, is htis wrong ? https://gist.github.com/2849052I'm trying to connect to a site and then get access a page that's only available if you logged in but when I do my GET it looks like I'm not connected anymore
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<vectorshelve>
hemanth: hai bhai
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<hemanth>
vectorshelve, hey
<vectorshelve>
hemanth: :)
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<eggie5>
does anybody know why this doesn't work in the redis gem? redis.sadd "my_set", ["a", "b", "c"] ? i just adds that literal string to redis "[\"1\", \"2\", \"3\"]" instead of 3 separate items
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<eggie5>
the gem docs day member (String, Array<String>) — one member, or array of members
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<eggie5>
cj3kim: night
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<cj3kim>
Are Proc and Lambda both necessary in Ruby? How important is it that we need both? The only difference I see is in the effect of control flow key words.
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<bnagy>
there are quite a few differences
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<bnagy>
and lots of blogs about them
<bnagy>
but I can't answer your underlying question 'how important' :/
<Hanmac>
cj3kim lambda has fixed parameter count, proc has not
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<banisterfiend>
cj3kim: i personally dont think we need lambda, i normally just use proc
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<cj3kim>
Thanks. It seems this quesiton gets asked a lot.
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<banisterfiend>
cj3kim: lambda has a nicer syntax in 1.9 though
<cj3kim>
I have recently discovered the magic of Proc. It feels weird but fun! :D
<banisterfiend>
cj3kim: in most cases u dont need procs though, blocks are enough
<fayimora>
do i always have to put my specs in spec/ ? I just want to write specs for a single ruby method
<banisterfiend>
cj3kim: are you using then in a situatino where u cant use blocks?
<cj3kim>
banisterfiend: Do you feel it's good practice to use them anyway?
<banisterfiend>
cj3kim: haha, it totally depends on the situation. If i *can* use a block though, it's better to
<cj3kim>
banisterfiend: No, I'm bored and reading up on Procs because it was a concept that eluded me for a while.
<banisterfiend>
as the syntax is cleaner
<banisterfiend>
cj3kim: do you understand blocks?
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<cj3kim>
banisterfiend: Not totally, but I use them a lot. Hmmr, that's actually quite a scary thought.
* cj3kim
goes to api
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<bnagy>
is there any real difference between res=yield var and res=blk.call var in a block method?
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<matled>
banisterfiend: do I miss something or what is a block if not a proc/lambda passed as the special block paramater?
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<banisterfiend>
matled: same thing as proc but nicer syntax
<fayimora>
How do i use spec on a file that has just one method, no class ?? THis is what i have => https://gist.github.com/2850098
<banisterfiend>
and slightly faster
<fayimora>
both files are in the same directory
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<Hanmac>
matled the block itself is not an object, but if you pass it as &block parameter its turned into an proc
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<matled>
Hanmac: but it behaves exactly like a proc, doesn't it?
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<Hanmac>
after it turned into an proc, yes
<mtfk>
hi how in ruby 1.8.7 can I do something like that YAML.parse([1, 2,].to_yaml).to_ruby
<mtfk>
I mean to_ruby method
<Hanmac>
PS: it makes a difference if you use &block and block.call or if you use yield
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<matled>
Hanmac: what is that?
<Hanmac>
yield is the internal command ... like def abc; yield 1;yield 2; yield 3;end ... abc {|i| p i} the block you pass to abc is called three times
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<cj3kim>
How come I can turn this into a block and what does it do? --> puts 'Hello' do puts 'hello' end ---> 'Hello' gets printed to the screen but the function in the block does nothing
<matled>
Hanmac: so what is the difference to def abc(&block); block.call 1; block.call 2; block.call 3; end?
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<Hanmac>
the differenc is that if you use yield and pass a no block, the block is not stored in a variable and does not need extra memory
<Hanmac>
i mean pass a block
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<bnagy>
as in you save one pointer? That's hardly a difference
<Hanmac>
a proc is more then a simple pointer ... it also holds the binding
<Hanmac>
cj3kim thats because puts is not designed to do something with the block
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<bnagy>
yeah, but the question was between def foo(arg, &blk) blk.call arg and def foo(arg) yield arg
<matled>
Hanmac: are you sure that is the way it is implemented?
<bnagy>
both of those blocks will have their binding
<cj3kim>
Hanmac: Thank you.
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<Hanmac>
but one of the blocks is put in a proc
<bnagy>
I was wondering if they're basically functionally equivalent if you call them both like foo(3) {|i| p i}
<Hanmac>
and i heard yield is faster
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<bnagy>
lame benchmarking suggests you're right
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* Hanmac
solved the daily quest: "You are right!" and gets 5 Ego-Points
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<bnagy>
the less code is on the block the more you see the overhead
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<cj3kim>
Proc.new {|n| n * factor} <-- inside the get_time(factor) def. If I assign as so --> time3 = get_time(3) and call the proc ---> time3.call(4), why doesn't ruby raise an error when the variable n is undefined?
<bnagy>
cj3kim: maybe use pastie or gist or something, I have nfi what you're talking about :)
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<Hanmac>
cj3kim because n is your block variable and you assigned it with 4
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<cj3kim>
hanmac: Wow, thanks!
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<cj3kim>
So time3 retains a copy of the variable I passed in and uses it as the factor variable.
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<cj3kim>
bnagy: Is pastie generally preferred?
<bnagy>
it's just easier to read code than explanations of code
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<cj3kim>
Eh, when it's reasonable :] I was concerned about click through rates, but I suppose a wall of text is a deterrent for help.
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<apeiros|euruko>
bnagy: what does nfi mean?
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<cj3kim>
apeiros|euruko: no f**king idea
<apeiros|euruko>
cj3kim: ah, ok. btw., I think spelling out the word 'fucking' is fine here ;-)
<apeiros|euruko>
cj3kim: and thanks, of course ;-)
<cj3kim>
apeiros|euroko: :D
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<bnagy>
before I write one, is there a free ruby nokogiri based iTunes de-duper that anyone happens to know of?
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<mneorr>
Hey, anyone knows how to patch a class method, while I can't subclass or use 'super' ?
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<mneorr>
the class method has arguments, it's not just a :bar
<bnagy>
just redefine it?
<bnagy>
def Blah.bad_method; be_good; end
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<mneorr>
oh yes, sorry,. I've forgot to say that the original implementation should be kept
<bnagy>
well you can't patch it and keep it exactly the same :)
<mneorr>
it's a constructor, and when I override it, everything else breaks. so the Super won't work because there's no superclass factory method
<mneorr>
I want just add the attr_reader for arguments passed in :)
<mneorr>
it seems like they're becoming private, or just forgotten
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<bnagy>
def Blah.wrapper( *args ); setup_accessors; real_meth *args; end ?
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<mneorr>
let me try it, tnx
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<mneorr>
still not sure how to set it up, in my case it ends up recursively
<mneorr>
I'll paste it
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<mneorr>
if it helps - it's rubyMotion, a iOS ruby implementation
<mneorr>
and what i'm doing, unit testing the network connection wrapper :)
<bnagy>
well that's going to set up class ivars
<bnagy>
is that what you want?
<mneorr>
everything is more-less already tested, but I want to make sure when someone calls NSURLConnection.connectionWith... ... , that the right arguments are passed in
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<mneorr>
yeah that works, but it breaks the other tests that are using the real one, since the object is never initialized
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<mneorr>
if I just type NSURLConnection.connectionWithRequest(request, delegate:delegate) in a place of a comment, it ends up recursively
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<bnagy>
you need to call your wrapper something different
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<bnagy>
otherwise you just redefined the class method
<banisterfiend>
bnagy: #ruby-lang wasn't the shangri-la i remember, it's actually DEAD. I remembered it being a place for intricate theoretical discussions about the interesting parts of ruby
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<banisterfiend>
but it's just a bunch of nothing
<banisterfiend>
sad sad sad
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<mneorr>
:bnogy Since I'm not a Ruby dev, It's still failing.. :)
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<bnagy>
mneorr: not sure how to get it working with attr_reader, but it should work with define_method
<mneorr>
okay, thanks for the tip!
<mneorr>
will be back later
<apeiros|euruko>
friday hug! :D
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<vectorshelve>
HAI ALL :)
<bnagy>
anyone know how to pass -J-Xmxsomething to irb under jruby?
<bnagy>
google is not being helpful
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<matled>
bnagy: I'd try strace -e execve -ff and check at which point java is executed.
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<shevy2>
#ruby has the advantage of higher traffic than #ruby-lang
<banisterfiend>
shevy2: are you on #ruby-lang ?
<shevy2>
nah
<shevy2>
they require for people to register in order to have voice
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<shevy>
since some months. I am too lazy for that
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<banisterfiend>
shevy: you should register shevrolet
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<shevy>
the thing is, I am to lazy to register really
<shevy>
but you can register that
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<ncopa>
hi
<ncopa>
i am packaging ruby for alpine linux
<ncopa>
the buidl will install rake, rdoc and minitest gemspec under /usr/local, which is not acceptable
<ncopa>
can i just delete the gemspecs?
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<_br_>
Anyone experience with multiple Databases in DataMapper?
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<_br_>
Interesting problem I caused myself there. OpenStruct returns nil if something doesn't exist. .e.g. "if( @options.session_db_tyoe == db_type )" where @options is a OpenStruct and the return is nil. Now it compares nil with string which is false. Awesome. Do we really want such a behavior? What happens to nil in a boolean expression? Anyone knows?
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<keymone>
_br_: in ruby nil and false are evaluated to false during boolean checks
<keymone>
_br_: everything else is evaluated to true
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<_br_>
keymone: I see. Quite difficult to debug though ;|
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<keymone>
_br_: well it's quite simple when you know it really. just don't use nil as a value, use it as it was intended - absence of a value
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<_br_>
keymone: well in my case actually it was a typo in the ostruct key -.-
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<keymone>
i guess you could tell openstruct to raise exception when non-existing key is requested
<_br_>
keymone: anyway thanks for the support ! :)
<keymone>
like use .fetch instead of [] on a hash - that will raise exception and you will spot the problem immidiately
<keymone>
_br_: cheers
<_br_>
Oh, .fetch, thats interesting have to remember that one ..
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<becom33>
in this https://gist.github.com/c8ccda257f8ecd8234db I only search for they , I want a general search in key and value both . even the half of search value is in the key it should come as a result
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* becom33
? anyone ?
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<carloslopes>
becom33: wait a second, i'm testing here a possible solution
<becom33>
sure
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<carloslopes>
becom33: you are looking for something like this: hash.each { |k,v| puts "#{k}: #{v}" if k =~ /#{lis}/ || v =~ /#{lis}/ }
<carloslopes>
?
<carloslopes>
are you looking*
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<apeiros>
move /#{lis}/ outside the loop
<carloslopes>
apeiros: yeah.. it's better, make a regexp var and use it inside the block :)
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<_br_>
Does anyone know why you get an "DataMapper::ImmutableError: Immutable resource cannot be modified" if you get a record from dm-redis-adapter with "MyClass.first( :a => "b" )" ? Is this a bug? How am I supposed to update a record?
<apeiros>
given that it says that the resource was immutable, I'd say you're supposed to not update it at all
<apeiros>
but I know neither DM nor redis well
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<_br_>
apeiros: Hm, I think so as well, but its a bit weird, first to remove then to recreate then entire record. Going through the source of dm-redis-adapter there is a update function, so it shouldn't be an issue of redis. Weird.
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<carloslopes>
_br_: maybe some wrong db configuration :/
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<_br_>
carloslopes: Interestingly no, if I work directly with redis it works fine. Seems this is an issue of dm-redis-adapter. Maybe a #bug. Need to dig down into this.
<_br_>
apeiros: carloslopes: thanks for the comments!
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<carloslopes>
_br_: ;)
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<apeiros>
mario-goulart: is that supposed to be a question?
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<mario-goulart>
apeiros: `translate_singluar_message' looks like a typo. I can't find any reference to "singluar" in gettext's code.
<apeiros>
aha, you're refering to 'singluar', yes. sounds like a bug.
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<mario-goulart>
It seems that it is a typo that got stuck in the code.
<mario-goulart>
$ git grep singluar |wc -l
<mario-goulart>
11
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<apeiros>
def translate_singluar_message(*a,&b); warn "translate_singluar_message is a typo, use translate_singular_message instead. this method will be removed in version X.Y.Z"; translate_singular_message(*a,&b); end
<apeiros>
that'd be my suggested patch
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<apeiros>
or part of my suggested patch
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<mario-goulart>
Thanks apeiros. Sorry for the stupid questions. I'm not used to the ruby ecosystem. I just started working on a project that uses ruby-gettext and stumbled upon that method name in an error message, so I instantly thought that "translate_singluar_message" could be a call to an unbound method or something.
<apeiros>
mario-goulart: my problem was that you didn't give a) any detail and b) didn't tell what your question was (i.e., *what* the supposed bug was…)
<apeiros>
mario-goulart: but you're welcome
<mario-goulart>
Indeed. My bad. Thanks for your help.
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<becom33>
what could this mean ? c.to_s(16)
<hoelzro>
probably format a number as hex
* hoelzro
doesn't know
<fayimora>
please how do i increment the value of a key in a hash
<becom33>
then why do I get to_s': wrong number of arguments (1 for 0) (ArgumentError)
<fayimora>
I tried my_hash['key'] += 1 but I get NoMethodError because of the + which is weird
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<hoelzro>
fayimora: what class is my_hash['key']?
<hoelzro>
becom33: then it's broken code =)
<hoelzro>
maybe it used to work, but no longer does?
<apeiros>
becom33: probably because you're not calling it on a number
<hoelzro>
apeiros: oh, good call.
<apeiros>
fayimora: probably your key is empty (nil)
<apeiros>
fayimora: first thing to do is to read the exception you get carefully.
<apeiros>
fayimora: in case of counting, Hash.new(0) instead of {} helps
<apeiros>
fayimora: but read the docs of Hash::new carefully.
<fayimora>
ok
<fayimora>
thanks
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<becom33>
anyone ???
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<barnex>
becom33: what it's supposed to do?
<becom33>
barnex, need a hex value
<barnex>
hex value of a letter?
<becom33>
yes
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<barnex>
'i'.ord.to_s(16)
<barnex>
to_a makes stuff into arrays
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<socomm>
Hello I'm a beginner and am wondering if anyone can recommend me a good book to learn ruby.
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<barnex>
do you know other programming languages?
<socomm>
barnex: currenctly programming in bash, not sure if that counts.
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<hoelzro>
socomm: The Ruby Programming Language is quite good, but I think it caters to those with an already strong programming background
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<barnex>
well, if you know what is 'variable' or 'regex' The Ruby Programming Language will serve you well
<barnex>
Yup
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<barnex>
It will teach you ruby, not how to program
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<socomm>
ill check it out, thanks guys
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<deryl>
The Well Grounded Rubyist
<deryl>
by David Black
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<twock>
Ooh, what about Why's Poignant Guide to Ruby?
<twock>
It's nice.
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<Ricky_Ricardo>
Have they maintained that book?
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<Ricky_Ricardo>
I haven't looked at it in years, but I've been curious if its kept up to date with 1.9
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<socomm>
twock: looks like its made for kids
<deryl>
wouldn't matter. 99% of it would still be applicable and usable in 1.9
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<shevy>
the poignant guide is more a piece of art
<shevy>
I myself did not like it when I came to ruby though, it only confused me
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<ekaleido>
i thought it was humorous
<shevy>
Ricky_Ricardo, the guide can not be maintained anymore. _why left, and one can not replace a visionnaire. see shoes, it's going down too
<ekaleido>
but it got in the way of learning
<shevy>
yeah
<shevy>
there are also those who think the opposite though
<shevy>
"I got interested in ruby when I saw the poignant guide"
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<shevy>
haskell has something nice... it's like a mixture of poignant guide + learn to program, online... some tutorial
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<theRoUS>
how can i tell if $stdin and $stdout are pointing to the same device? (only if #tty? => true for both)
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<Sigma00>
barnex: you wanted string to hex right? "a".hex ....
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<tannerozzy>
What's the best way to learn ruby? Good old textbooks? Videos? Workbooks? My boss just asked me to learn some Ruby to help him with a project (he knows none).
<theRoUS>
i want to send the tty some control sequence queries and read the responses, but first i want to make sure that $stdin and $stdout are referring to the same terminal
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<theRoUS>
tannerozzy: i found the apress book to be quite good
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<tannerozzy>
It felt sorta like "Hey, can you learn French real quick…"
<graspee>
the best way to learn ruby is to have a desire to learn. then stand in the forest in the cool evening breeze and open your mind
<graspee>
the foxes will approach you and impart their natural wisdom
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<graspee>
or read the pickaxe book
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<ex0a>
tannerozzy: i was referred to Pragmatic Bookshelf Programming Ruby
<ex0a>
but i haven't read it yet so i can't comment on it
<tannerozzy>
Oh I do. I want to learn as much code as possible. I just graduated with a film degree, and only after do I realize how much I just wanted to be a programmer.
<Sigma00>
tannerozzy: I've had decent mileage just reading a tutorial online and then grabbing source and going to town with it. Currently working on a bot and it's teaching me SO MUCH :P
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<Sigma00>
I wouldn't recommend that method if you don't already know how to program tough
<Sigma00>
though*
<shevy>
tannerozzy best way (1) work through chris pine tutorial at least once, then immediately start (2) which is to write a ruby script on your own. doesnt matter what it should do... it should have and solve a useful task for you though
<shevy>
just reading books alone wont be enough. the pickaxe is a nice reference book though, it has the whole standard lib of ruby in the appendix including examples and explanations
<graspee>
reading books alone is enough
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<shevy>
also you should ask graspee for help so he can help you and teach better rbuy
<graspee>
you can learn from the pickaxe book easily. i did
<Sigma00>
those of you that use IDEs... which one do you like?
<graspee>
geany
<shevy>
Sigma00, bluefish 1.0.7
<tannerozzy>
Wow. I've also never used IRC before. A programmer in my office just got me into it this morning. You guys are all super helpful, thanks!
<Sigma00>
shevy: I'll check it out, thanks
<Sigma00>
I've been using RubyMine, and it's been pretty good
<shevy>
Sigma00, it's not an IDE though hehehe :D
<Sigma00>
Aptana sucks balls <_<
<shevy>
Hanmac uses eclipse for C++
<Sigma00>
oh, I see it
<shevy>
I find those IDEs way too huge
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* Sigma00
shakes a fist at shevy
<shevy>
for ruby at least
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<Sigma00>
I'm just a whore for autocomplete and intellisense stuff
<shevy>
yeah
<graspee>
is there something that does that for ruby?
<shevy>
bluefish 1.0.7 is outdated nowadays, but the features I want from other editors just arent there in the way I want them
<Sigma00>
RubyMine does a semi-decent job at intellisense
<shevy>
I am going to wait for a modular editor which I can have complete control over what features it has
<graspee>
can i type the name of a method and it will show me the parameters?
<Sigma00>
shevy: boxcar?
<shevy>
Sigma00, never heard that word before
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<Sigma00>
graspee: yes, as long as it's a method you've created or a Kernel method
<Sigma00>
kernel/object/etc
<graspee>
i see. i'll give it a shpin then thanks
<graspee>
the only completion that geany has is "words you have typed in the files i have loaded"
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<graspee>
but otherwise, geany is a nice editor with the folding and the tabs and the syntax highlighting
<Sigma00>
I wish ruby was optionally typed
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<graspee>
and the concept of a project, which is just multiple files to load together, but isn't always supported by tabbed editors, weirdly
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<Sigma00>
... that highlighting is only marginally useful
<Ankhers>
agreed...
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<graspee>
what else do you want from it?
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<Ankhers>
variables
<Ankhers>
Also, a different colour scheme...
<graspee>
what about variables?
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<Ankhers>
colour them...
<graspee>
why?
<graspee>
if everything is coloured your screen will end up like a fruit salad
<graspee>
and you can change the colours easily enough
<workmad3>
graspee: looks a bit ugly :)
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<graspee>
i wouldn't count that as "horrible ruby syntax highlightying by default"
<Ankhers>
Just use emacs.
<graspee>
emacs sucks on dvorak
<banisterfiend>
graspee: you grow out of geany pretty quickly
<graspee>
into what, banisterfiend ?
<workmad3>
graspee: vim
<Ankhers>
No it doesn't... just change your key bindings...
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<banisterfiend>
graspee: into either vim, emacs, usually
<workmad3>
graspee: and don't say it sucks on dvorak too, because I'm sat here on dvorak and have no issues :P
<banisterfiend>
graspee: and emacs does not suck on dvorak, i know heaps of emacs users on dvorak
<graspee>
you find typing the key sequence to leave emacs easy?
<Sigma00>
I do find myself programming in vim a lot
<graspee>
emacs is designed for qwerty
<graspee>
if you find it easy on dvorak good for you, but it's designed for qwerty
<graspee>
you only have to look at where the keys are on the keyboard
<workmad3>
graspee: oh, that's a pita in emacs no matter what your layout :P
<Ankhers>
and yet you can change all of your keybindings...
<skryking>
I've kind of had sublime text 2 grow on me
<banisterfiend>
graspee: that hasn't stopped many top rubyists including zenspider making very effective use of emacs on dvorak ;)
<graspee>
i've had stuff about zenspider
<graspee>
heard*
<banisterfiend>
graspee: so i fear you overstate the difficulty in using emacs on dvorak :)
<banisterfiend>
graspee: Yeah: mainly he's possibly one of the most productive ruby programmers ever
<graspee>
i can't overstate the difficulty because i mean the difficulty for me
<workmad3>
graspee: I put that exit sequence down to the mindset that you should never want to exit emacs :)
<graspee>
actually i heard he was a monster who threw people out of ruby-lang when they disagreed with him
<banisterfiend>
graspee: what has that got to do with emacs on dvorak? even if its' true (which it isnt) it's completely irrelevant
<graspee>
whatever
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<graspee>
i don't want to continue this discussion that feels like two people leapt out of the bushes and started trying to club me to death
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<Ankhers>
You are just stating things, but can't backup your claims.
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<banisterfiend>
graspee: np, and btw, idiomatic ruby is double-spaced (not quad-spaced) :)
<graspee>
this isn't a court of law ffs
<graspee>
i gave my reasons
<shevy>
it is true. zenspider kicked out people who disagreed with him before from #ruby-lang.
<banisterfiend>
graspee: read back over the converastion, no one said something rude to you
<banisterfiend>
shevy: still irrelevant :)
<Ankhers>
You gave your opinion on emacs, we gave you our opinions on your opinions..
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<graspee>
well now i have them so you don't have to give me them ever again
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<Ankhers>
On a semi related note, to any emacs/bim users in here. Has anyone tried evil mode for emacs?
<Ankhers>
emacs/vim users rather...
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<banisterfiend>
Ankhers: what's evil mode?
<graspee>
it's a vi mode
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<banisterfiend>
Ankhers: no, im pretty happy with the emacs keybindings
<Ankhers>
From the evil home page: Evil is an extensible vi layer for Emacs. It emulates the main features of Vim, and provides facilities for writing custom extensions.
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<Ankhers>
As am I. I've switched from vim to emacs. I was just wondering about people having actually used it.
<shevy>
emacs is a good OS
<Ankhers>
agreed
<shevy>
hmmm
<shevy>
can you use ruby to extend either emacs or vim?
<banisterfiend>
Ankhers: what made u switch to emacs and what do u enjoy about emacs that you couldn't find in vim?
<workmad3>
shevy: you can do ruby plugins for vim
<workmad3>
shevy: but they're a PITA
<shevy>
:(
<graspee>
is there a law against using 4 spaces?
<shevy>
I'll just wait two years, then pry-editor will replace both vim and emacs
<Ankhers>
banisterfiend: The main thing that got me to switch is that when I started in the position I'm at now, I paired a lot with an emacs user.
<shevy>
4 spaces are 2 spaces too many, for indents
<graspee>
i'll indent how i like
<graspee>
it's my code. it's for me
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<workmad3>
shevy: you need vim built with ruby support, which the standard vim on mac isn't, and is annoying and flakey on ubuntu
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<graspee>
and i like 4 spaces
<banisterfiend>
Asher: so it's just out of convenience not because you actually found any features of emacs attractive?
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<banisterfiend>
Ankhers: *
<graspee>
i was showing the screenshot to show the syntax highlighting, not to get comments about my indenting style
<banisterfiend>
graspee: quit being so defensive
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<Ankhers>
banisterfiend: I also do a fair amount of work with interns, and emacs is a lot easier to pickup than vim.
<graspee>
picking up on that is just taking a cheap opportunity to get another jab in at me
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<banisterfiend>
graspee: he's just giving advice
<graspee>
and make yourself feel superior
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<graspee>
i was talking to you, banisterfiend
<banisterfiend>
graspee: no, he's just telling you idiomatic ruby style. take it or leave it, no need to act like a bitch
<workmad3>
graspee: ruby community is pretty standardised around 2 space indents
<graspee>
don't call me a bitch
<shevy>
you can put more (code) information / line if you use 2 spaces as indent than 4
<graspee>
don't
<graspee>
ever
<graspee>
call
<graspee>
me
<graspee>
a
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<graspee>
bitch
<graspee>
ok, mate?
<banisterfiend>
graspee: call it as i see it ;)
<graspee>
got that?
<Ankhers>
banisterfiend: I do enjoy both, I can just do a lot more inside emacs than I can in vim. For instance, I'm on this IRC via emacs. I also had some prior experience with lisp, so extending emacs is a lot easier.
<dcope>
i'm really dreading converting to that because i don't have faith in the automated conversion tool in xcode heh
<banisterfiend>
hehe
<dcope>
plus we have to support 4.0
<banisterfiend>
arc is pretty cool though block related code can be ugly
<banisterfiend>
reassiging a variable to a __weak Blerg * outside the block to prevent retain cycles
<banisterfiend>
an object*
<dcope>
yup
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<banisterfiend>
workmad3: have you noticed #ruby-lang has died over the last year or so
<workmad3>
banisterfiend: I never paid much attention to it :)
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<shevy>
it's the traffic frequency really
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<shevy>
you get worse questions here, but you also get more questions here. so people can learn more (if you sum things up... some people on #ruby-lang are never on #ruby and vice versa)
<shevy>
we'd just have to lure some folks... like drbrain!
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<shevy>
you should have seen apeiros response what he said about #ruby-de and left there
<shevy>
too much line noise for him / off topic talk
<shevy>
:D
<banisterfiend>
shevy: i thought #ruby-de was pretty dead too
* Sigma00
connects a live wire to the audio input for the channel
<banisterfiend>
also, it's in german, which is an ancient medieval language that no one really understands anyway
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<shevy>
yeah banisterfiend but it was very offtopic. they talked about reallife stuff, which is fine, but they never really talked about ruby at all, so it was kinda a waste of time to be there when you wanted to hear more about ruby
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<banisterfiend>
shevy: sounds like #pry ;)
<shevy>
well pry is in ruby at least
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<shevy>
those guys in #ruby-de who do write ruby code, are usually in #ruby-lang, and sometimes in #ruby at least
<shevy>
like chris2 or lianj
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<Snugug>
Hey guys, quick question. I've got a fixnum that I need to convert to a floating point if it's an integer (i.e. converting 1 to 1.0). Super new to Ruby, can someone help?
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<arturaz>
1.to_f
<Snugug>
That's it? Cool!
<Snugug>
Lemme try
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<shevy>
arturaz I think you somehow caused him to quit here :P
<Ethan>
hi shevy
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<shevy>
hi Ethan
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<shevy>
are you the chemical structure C2H4?
<Ethan>
Let me check.
<Ethan>
Nope, sorry.
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<shevy>
kk ... actually come to think about it, in english it is "ethane" ... only in german it is "ethan" http://en.wikipedia.org/wiki/Ethane
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<Ethan>
this is actually my name anyways
<Ethan>
it's Hebrew!
<shevy>
:)
<shevy>
it is?
<Ethan>
yup
<shevy>
I always have to think of names like ... "Ethan Hawke"... "River Phoenix" ... when I read that
<Ethan>
lol
<shevy>
hmm perhaps not so much when I would read "Nathan" or "Nathaniel"
<Ethan>
brb
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<philo345>
hi
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<philo345>
i have a problem with %x, it seems not to handle the '$' caractere correctly
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<philo345>
is that normal ?
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<vikingly>
Hi! I would like to represent a chain of rules in ruby and wonder if anyone has advice on syntax. A rule is a tuple <when it applies, when it does not apply, what id does when it applies>, and a chain is a numbered sequence of rules monotonically increasing from 0.
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<shevy>
kenyabob hmm perhaps when you call them in threads
<jstarcher>
I've got a ruby script which kicks off a php script on my server in a loop so each iteration (based on a sql count() query) will make multiple php calls to in turn generate emails. I need to make my ruby script into a daemon so based on the sql count it can call php to generate and send emails when ready.
<jstarcher>
would python be better suited for this
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<shevy>
jstarcher not really sure
<shevy>
perhaps python makes it easier
<shevy>
it tends to have good documentation
<jstarcher>
yeah that's my only issue so far with ruby, not finding very good documentation for this
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<shevy>
not only there, I think ruby's biggest problem today is a lack of really HIGH quality documentation
<shevy>
second biggest problem is that rails got too big :P
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<shevy>
or in other words, there tends to be a lack of really genius, great projects that are not overshadowed by the rails ecosystem
<shevy>
i.e. what you would see today if you would have ruby, subtract all of rails, and then look at the result that is left from that
<wmoxam>
shevy: um
<wmoxam>
Chef?
<wmoxam>
Puppet?
<wmoxam>
Homebrew?
<shevy>
homebrew is mac only
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<shevy>
wmoxam for a moment I thought you are workmad3_ :\
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<shevy>
cant say much about chef or puppet
<workmad3_>
nope, I'm me, not him
<wmoxam>
A tree is a tree, not me
<workmad3_>
but chef
<workmad3_>
although it all depends on how many machines you need to manage
<shevy>
1!
<wmoxam>
shevy: Ruby has long been strong for devops types
<shevy>
hmm actually that is not true, I also have a windows laptop, but I rarely turn it on
<wmoxam>
that's how I started using it
<workmad3_>
ruby does seem to be a bit stronger in devops than python nowadays
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<wmoxam>
was python ever that strong in that area?
<workmad3_>
I think the python ecosystem managed to prevent really great devops platforms like chef from really taking off
<wmoxam>
for me it was perl -> ruby
<workmad3_>
it used to be a strong sysadmin scripting tool
<digitalcakestudi>
whats a good condition for checking if an object is found in a array? array.has? == someobject ?
<wmoxam>
perl was *the* sysadmin scripting tool
<wmoxam>
still is in a lot of ways
<workmad3_>
you just need to look at the prevalence of python in system scripts for that (especially in ubuntu... python for building grub configs, python for vm building, python in lots of places)
<wmoxam>
it's in the base of most OSS *nixes
<workmad3_>
yeah, perl is very strong there too
<wmoxam>
in the bsd world it's all perl
<workmad3_>
:)
<shevy>
shows their age
<shevy>
:D
<workmad3_>
python was certainly making inroads though
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<wmoxam>
shevy: why throw out shit that works well?
<digitalcakestudi>
week.includes?(Date.today) ? ("current-week week" : "week") does that look valid assuming I have require date?
<shevy>
and I am never going to forgive perl that it allowed that php could exist
<digitalcakestudi>
oh wait I see it now
<wmoxam>
meh
<shevy>
I acknowledge that perl is the old granfather of the other "scripting" languages though
<shevy>
*grandfather
<shevy>
when Larry was still young and awesome
<shevy>
now he is old and not as awesome as he used to be when he was younger
<wmoxam>
the main reason that php exists would have still been true if Ruby held perl's position way back when
<Sigma00>
digitalcakestudi: no. Remove the ()'s after the ?
<wmoxam>
and that reason is easy of setup when hosting
<shevy>
yeah wmoxam
<wmoxam>
load modphp, done
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<digitalcakestudi>
right, its a rails content_tag thing content_tag(:tr, :class => (week.includes?(Date.today) ? "current-week week" : "week") but even that still does not work
<digitalcakestudi>
doh, was one last ) missing at the end
<shevy>
digitalcakestudi you really like all the () dont you :P
<shevy>
a shower of joy covers me every time I type "("
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<shevy>
it reminds me of the awesomeness that lisp is
<digitalcakestudi>
I'm still learning ... :S
<shevy>
(this(is(valid(lisp
<digitalcakestudi>
haha
<Sigma00>
)))) damn you
<shevy>
:(
<digitalcakestudi>
you for got the ;
<Sigma00>
k/mark
<Sigma00>
whoops
<shevy>
the ) really make this uglier
<shevy>
what if lisp would have ( and indent? then you could omit the ) perhaps
<shevy>
(this
<shevy>
(is
<shevy>
(valid(
<shevy>
oops
<shevy>
well you get the idea anyway
<yxhuvud>
well, there are lisp variants that have ] as a closeall
<Sigma00>
indents as part of the language? yeaaaah no
<digitalcakestudi>
week is an array so should it includes? as in week.includes? somearg
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<Sigma00>
digitalcakestudi: if it's an array of Dates it should work
<shevy>
yxhuvud, really? do you mean they use ((( and ))) but also allow ] ? but not [ ?
<shevy>
Sigma00 but ... but .... but ...... python is using it! :D
<Sigma00>
huh, I guess that moves python a bit lower in my list of languages to learn then
<shevy>
digitalcakestudi, yeah though usually array.include? is more common than .includes?
<Sigma00>
oh, wait, includes doesn't exist
<shevy>
does not?
<yxhuvud>
what would be the point of [? makes no senese
<shevy>
I thought matz added that when people wanted it at a convention once years ago
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<Sigma00>
shevy: it's only include
<Sigma00>
digitalcakestudi: include, without the s
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<shevy>
yxhuvud, dunno... perhaps ... [this is valid lisp ... or (this(is(valid(lisp ... hahaha I am having fun here
<digitalcakestudi>
oh
<Sigma00>
shevy: I just fired up irb to see if it did. Doesn't
<digitalcakestudi>
thanks
<shevy>
hmm but I am sure matz added something once... something that would be "proper english"... not sure to which method
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<Sigma00>
well, if you want proper english you can add it yourself :P the beauty of ruby
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<Sigma00>
include? does sound like a typo though
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<shevy>
btw graspee I just compiled geany (finally), and now made a screenshot. this is the default how geany looks for me when I open a .rb file -> http://oi50.tinypic.com/2ailqhy.jpg
<shevy>
your screenshot looks better, but mine really shows that the default, on my system, is really not useful at all for me. on #geany they said one can use geany-mod or plugins and change that, but I was too lazy to do that
<shevy>
it has blue, red and black. that is terrible
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<shevy>
lemme show you how it looks on bluefish 1.0.7 out of the box
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<davidcelis>
what are you all doing here
<davidcelis>
it's mother fucking national doughnut day
<shevy>
on fluxbox though. if I were to use gnome, both screenshots would look better
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<spikku>
[<-- Ruby newb] So I'm trying to use strptime, the date looks like this '2012/06/01 12:12:12' and I can't seem to use colons in the time format '%H:%M:%S', how to I format for a time like that?
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<shevy>
I always knew the day would come when it is striptime time on #ruby
<shevy>
who starts?
<davidcelis>
sorry, i meant
<davidcelis>
time.strftime("%Y/%m/%d %H:%M:%S")
<shevy>
yeah man show us the stripped time
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<davidcelis>
WOOOOOO
<davidcelis>
TAKE IT OFF
<Ankhers>
I think I came back at the wrong time..
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<atmosx>
clear
<atmosx>
oops sorry
<atmosx>
hello :-)
<shevy>
unclear
<atmosx>
I forgot a '/'
<shevy>
clear/
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* atmosx
INXS - Mystify
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<atmosx>
hahaha that won't work shevyyy
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<spikku>
Got it, duh, DateTime, not Date! >.<
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<spikku>
%T is fun too
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<atmosx>
I started reading Quicksilver and got stunned by the 1st chapter entry quote. That was something I was looking a name for a couple of years back.
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* atmosx
INXS - The Gift
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<davidcelis>
%F %T is a better shortcut, though; time.strftime("%F %T")
<platzhirsch>
haha, that is the name of it? Didn't know there is a counterpart for CamelCase
<eam>
is ruby-dbi the right DBI style interface to use?
<Solnse>
camels are afraid of snakes.
<davidcelis>
dorei: respond_to?
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<davidcelis>
dorei: or if it's some method_missing bullshit where someone didn't correctly update respond_to, then you can do obj.methods.include? :method_name
<digitalcakestudi>
whats the way to look in a proc and see what it has?
<eam>
does ruby ship with a dbi module in the core dist?
<davidcelis>
digitalcakestudi: "what it has"?
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<digitalcakestudi>
when you put it that way :P
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<digitalcakestudi>
I dont really know what a proc is, I assumed its like a block passed as an argument
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<eam>
googling around shows many people using mysql2 -- which doesn't seem to be abstrated at all
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<eam>
does everyone really use a database specific module directly in ruby? is that convention?
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<davidcelis>
digitalcakestudi: yes a Proc is a block object, but what do you mean "what it has"?
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<digitalcakestudi>
introspect to see it it has objects ect..
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<digitalcakestudi>
see if I can iterate or objects or what have you
<davidcelis>
before it's run?
<digitalcakestudi>
yeah
<davidcelis>
how would you do that in an interpreted language?
<davidcelis>
one that is dynamically typed, no less?
<digitalcakestudi>
:) science
<davidcelis>
i can't imagine a good way to know what kind of object a variable will hold before it's run
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<davidcelis>
you can know where a Proc is defined, you can know its binding, you can know if it's a lambda
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<digitalcakestudi>
thanks for clearing that up
<davidcelis>
but yeah, what you're asking is (as far as I know) just impossible in a language like Ruby
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<deryl>
eam, the gems are for database specificity, but you might want to look at 'sequel' gem. its basically the dbi of the ruby world. and taps is used to convert from db to db. see http://sequel.rubyforge.org for sequel. see https://rubygems.org/gems/taps for taps. basically allows you to transfer db data between dbs when coupled with sequel from what i understand. i've never used taps myself
<vertroa>
Does any one know if the pragmatic studio ruby course worth buying?
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<dorei>
ruby is really fun, but i think all those conventions kill the fun :(
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<barnex>
Sigma00: well, becom33 wanted string to hec, but thanks anyway :-)
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<davidcelis>
dorei: what
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<Veejay>
Hey everyone, suppose I have a hash and also have an array with the keys of the hash, ordered in a particular way. Is there an easy way to reorder the hash accoding to the order in the array
<Veejay>
Beyond the each on the array and creating a new ordered hash
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<banisterfiend>
Veejay: hey veej what's up, long time no see
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<banisterfiend>
Veejay: not really, order of hash is only really visible during iteration afaicr
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<Veejay>
Yeah
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<Veejay>
I'll tap {|| array.each } that shit
<Veejay>
banisterfiend: I'm good
<Veejay>
Enjoying the comeback of the sun
<Veejay>
I was out in the street
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<Veejay>
Street photography for life
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<Veejay>
banisterfiend: By the way, the pretty printing of all things in pry is spectacular
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<Veejay>
Boy was that nice yesterday when inspecting deeply nested structures
<Veejay>
Life-saver
<banisterfiend>
Veejay: cool
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<Veejay>
Colors and all :')
<banisterfiend>
hehe
<banisterfiend>
Veejay: and the pager? :)
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<Veejay>
Yeah, that's good too
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<fayimora>
am trying to test for an error. I have http://pastie.org/4009890 but I keep on getting unintialized constant error.. I can't seem to inure out the problem
<Veejay>
Now I'm waiting for the advent of your secret project that's way more awesome than Pry
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<Veejay>
Which is in fact so much awesome it's bound to disappoint :/
<Veejay>
Fucking hype
<Mon_Ouie>
fayimora: What constant and where?
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<Cpudan80>
Hello folks
<Cpudan80>
Is there a foreach where kind of thing in ruby?
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<banisterfiend>
Cpudan80: you mean like list comprehensions?
<sonicpond>
fayimora: i usually write those kind of tests as unless ['r', 'p', 's'].include?(s2)
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<fayimora>
sonicpond: sweet thanks
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<fayimora>
Do you guys think ruby would support python's indentation style in the future?
<fayimora>
I men get rid of the ends or make them optional
<Mon_Ouie>
Funny how some people love indentation-based languages and other hate them :p
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<Mon_Ouie>
I don't think Ruby will ever use indentation for parsing though. I doubt you could even do that without breaking existing code
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<sonicpond>
fayimora: i don't think so, but writing ruby interpreters is all the rage. you should write one and name it \sruby
<fayimora>
hehehehehe
<fayimora>
Imight gig it a try next year, when am good enough with the language itself
<fayimora>
**i might give
<sonicpond>
giggity
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<pridian>
hi, how can I launch the ruby command-line? I thought it was just a matter of typing in "ruby" in my terminal but that doesn't really do anything.
<quest88>
irb
<quest88>
^ pridian
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<sonicpond>
pridian: ruby -e 'system("irb")'
<Mon_Ouie>
IRB.start
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<Mon_Ouie>
pridian: Just ruby runs the interpreter, not the interactive one
<pridian>
Cool, thanks :)
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<bfig>
hello. what is a good tutorial on ruby?
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<banisterfiend>
bfig: google for tryruby and rubymonk
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<sonicpond>
bfig: http://www.rubykoans.com/ is fun if you would like to worship at the altar of tdd.
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<bfig>
tdd yuck
<bfig>
what's revolutionary about ruby?
<bfig>
(i'm reading through tryruby.org)
<sonicpond>
bfig: happiness
<bfig>
how is it happier than C++ or any other language?
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<sonicpond>
bfig: the language has no anthropomorphic trait, but humans who use it report that it makes them happy. i can verify this outrageous assertion.
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<bfig>
i'm willing to give it a shot, i have to make an interpreter for a compilers class i'm taking, but i find the whole notion a bit outrageous
<banisterfiend>
bfig: this is what sold me: here's the C code: for (int i=0; i < 10; i ++) { print("%d", i); }
<banisterfiend>
bfig: and here is the ruby: 0.upto(10) { |v| puts v }
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<sonicpond>
^ quite right
<bfig>
i don't know how that makes much of a difference
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<banisterfiend>
i have an off-by-1 error there, but u get the point ;)
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<bfig>
you have python which has more or less the same absurd syntactic simplification
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<banisterfiend>
bfig: 'absurd' ? :)
<bfig>
and by simplification i mean a zillion particular cases, but the perception of simplicity (this is not a jab at the language, just my take on it which i hope you won't take as offense)
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<bfig>
but tell me if i'm wrong please, allegedly my mates who work in python say the real deal is in rails
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<bfig>
s/python/ruby
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<banisterfiend>
bfig: other features, you can build new control structures in ruby
<bfig>
banisterfiend, that's not revolutionary. in scheme/CL you can bend the language to do your bidding with macros and rewrite rules
<banisterfiend>
bfig: for example loop { } <-- the equivalent of while(1) {} in C, is actually a method, not a built in keyword
<nwertman>
Guys, what is the right way to escape a string before passing it to printf if it contains printf formatting characters?
<banisterfiend>
bfig: i thought we were cmoparing to C++ ? :) if you're comparing to every language under the sun then of course ruby can't compete
<nwertman>
>> printf "%5B", for example
<banisterfiend>
ruby is a selection of features from various languages, what's unique about it is the particlar choice of features to combine
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<banisterfiend>
bfig: not necessarily the features themselves
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<banisterfiend>
bfig: ruby borrows from smalltalk and lisp primarily, it has smalltalk's object model
<banisterfiend>
and lisp's 'everything is an expression'
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<banisterfiend>
bfig: it also has 'blocks' and open classes, and a very clean/powerful metaprogramming API
<fantazo>
banisterfiend, and from perl, so it has also the goodness of awk in it.
<Monie>
How could I take an image and cut into puzzle pieces?
<banisterfiend>
bfig: for example, in ruby, class bodies are executable code. So you can invoke class methods in the body which look like keywords, but in fact generate instance methods for you
<sonicpond>
Monie: how are you defining "cut"?
<Monie>
Take a regular image, say a user has uploaded, and make it into multiple pieces with a sort of puzzle look.
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<sonicpond>
bfig: i think you're trying to get us to answer an essay question on your takehome exam. that's naughty.
<banisterfiend>
bfig: for example: class Hello; attr_accessor :x, :y, :z; end generates a class Hello with 'properties' x, y, z. In actual fact what's happenign there is the attr_accessor 'keyword' is actually a method (on the class) that is generating instance getter/setter methods based on the names of its parameters
<bfig>
sonicpond, not really. let me link you to what i have to do
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<bfig>
<bfig> it's not the full language of course, that'd be absurd <- banisterfiend
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<Monie>
:)
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<banisterfiend>
bfig: should be easy enough
<sonicpond>
there seems to be a glitch in the matrix
<banisterfiend>
bfig: lots of people have done it already, see tinyrb
<bfig>
i have a question though, yesterday we couldn't answer it with my partner
<bfig>
yeah i don't believe it is a challenge, otherwise it wouldn't be considered among the easier courses i can take in the whole five years
<bfig>
easiest*
<bfig>
but i have a question about closures and scope
<Monie>
Exactly what I needed, thank you sonicpond and wmoxam.
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<bfig>
consider a code that builds counters: def makecounter(); x = 0; def f(); x += 1; return x; end; return f; end;
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<bfig>
is that even valid code? i couldn't run it properly in the irb
<banisterfiend>
bfig: that is not defining a nested function
<bfig>
that is ideally defining a counter with a closure
<banisterfiend>
bfig: Yeah, two things: 1. nested functions dont exist in ruby 2. methods created via 'def' are not closures
<bfig>
ie, f() == 1; f() == 2; ...
<bfig>
allright. so i can't do that?
<banisterfiend>
bfig: you cant
<bfig>
what's a closure for a rubyist?
<banisterfiend>
bfig: lambdas/procs/blocks
<banisterfiend>
in summary: blocks
<banisterfiend>
theyre the only real closure construct
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<banisterfiend>
bfig: i would wirte your code like this: def makecounter(); x = 0; lambda { x += 1 } end
<banisterfiend>
bfig: and then invoke it like this: my_lambda = makecounter; my_lambda.call #=> 1
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<bfig>
that's surprisingly unintuitive
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<banisterfiend>
bfig: that's because you dont understand ruby's object model :)
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<bfig>
first, what does = mean?
<banisterfiend>
it's intuitive once you understand the pieces
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<bfig>
= is overloaded as hell it seems...
<bfig>
if the thing on the right is a function you execute it?
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<wmoxam>
bfig: () is optional in ruby
* bfig
's head starts to spin
<wmoxam>
ie: puts 1
<wmoxam>
rather than: puts(1)
<bfig>
ok, that's fine, but what about 0-ary functions?
<bfig>
how do you distinguish a value from a function?
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<wmoxam>
bfig: there are no functions, there are object methods and blocks/lambdas/procs
<bfig>
:|
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* sonicpond
makes popcorn and pulls up a chair (this is an awesome thread)
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<platzhirsch>
Coding ruby and listening to the Kaiser Chiefs - Ruby ... rubylicous
<banisterfiend>
hehe
<banisterfiend>
bad internet
<banisterfiend>
bfig: anyway, what was confusing about that code example
<wmoxam>
bfig: when you define a global 'function' what you are really doing is adding a method to the Object class
<banisterfiend>
bfig: the only thing that's different between my code and yours was leaving out 'return' and replacing your f() with a lambda
<bfig>
banisterfiend, everything? how do you know what to return? how is what you said sintactically different from a function definition?
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<bfig>
return is optional then i guess
<banisterfiend>
bfig: what's returned is the last expression inside the function
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<banisterfiend>
bfig: same as in many other functinoal languages
<bfig>
sure, but return also works right?
<banisterfiend>
bfig: Yeah, we often use return for an early-exit
<banisterfiend>
but if we dont need to early exit we leave out the return
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<bfig>
can you use continuation style?
<bfig>
ie, passing thunks around
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<AlRazi>
assume I have a hash 'lists' of 50 elements, I want to know the idiom to use lists.each do | list | but only for the first 8 elements, and if the array containe less than 8 it'll only loop those
<banisterfiend>
bfig: i'm not familiar with that terminology
<AlRazi>
lists.each 8.times do | list | <--- dreaming
<wmoxam>
AlRazi: lists[0..8].each do |list| ....
<bfig>
banisterfiend, are you familiar with the call with current continuation construct?
<AlRazi>
if lists has 7 elements, it'll only do those ?
<wmoxam>
er, [0..7] I guess
<wmoxam>
AlRazi: try it ;)
<AlRazi>
if lists has 3 elements, it'll only do those ?
<banisterfiend>
bfig: ruby does have first class continuation objects, if that's what you mean
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<AlRazi>
touche >_>
<bfig>
yes
<banisterfiend>
bfig: callcc
<bfig>
yes
<banisterfiend>
bfig: any more qeustions about the code exaple i gave?
<robertondc>
just use python
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<Spaceghostc2c>
banisterfiend: Thou art a bedevilment to mine heart.
<robertondc>
there is option
<Spaceghostc2c>
Yeah, use python, a child can do it!
<rtyler>
any of you fine folks know if something like lxr's "genxref" script which generates indexes for C code, exists for Ruby code as well?
<bfig>
this makes things a bit simpler
<bfig>
on the other hand it makes everything complicated as hell, since now i don't even know how the scoping rules are supposed to work
<bfig>
ie, my interpreter had a pretty simple structure... it even allowed continuations naturally
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<bfig>
let's go with another topic on which i'm having doubts: how do values and value passing work?
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<bfig>
ie, if i'm calling a function it's always a call by reference, right?
<banisterfiend>
bfig: you should read the ruby spec
<banisterfiend>
bfig: ruby has an ISO spec iirc
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<AlRazi>
wmoxam: yes it does
<bfig>
how big is it?
<wmoxam>
:D
<AlRazi>
wmoxam: thanks ^^
<banisterfiend>
bfig: not sure, but im sure it's easy enough to navigate
<banisterfiend>
bfig: also, if you want to look at a nice implementatin of ruby, dont look at MRI, look at rubinius
<banisterfiend>
or jruby i guess, if u like java
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<bfig>
hahaha not really :p
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<bfig>
i like scheme/haskell and only now have started to appreciate C++ ... it is a damn complicated language up to the point where you understand it, then everything seems reasonable
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<bfig>
i never liked Java
<Spaceghostc2c>
I don't mind Java.
<bfig>
actually it is not java the thing that i don't like
<bfig>
i don't like netbeans
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<bfig>
i hate netbeans... and since i associate everything javaesque with netbeans i hate everything java
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<Spaceghostc2c>
lo
<Spaceghostc2c>
lol
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<AlRazi>
does the .each has some sort of a counter i can check ? I want to be able to insert a <ul> every 4 elements
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<banisterfiend>
AlRazi: each_with_index
<AlRazi>
>_< ruby rox
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<Spaceghostc2c>
Gotta love documentation.
<davidcelis>
Spaceghostc2c: gotta love what?
<Spaceghostc2c>
davidcelis: Boobs.
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<nat2610>
hi, What am I doing wrong ? https://gist.github.com/2849052 I'm trying to login to a site and then get access a page that's only available if you logged in. I login just fine but when I do my GET it looks like I'm not connected anymore, I'm being redirected with a 302 to the login page again
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<Sigma00>
nat2610: Are you saving whatever cookies it gives you? (can't really look at the code, on my phone)
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<bfig>
td123, can classes exist in self contained scopes without affecting the rest of the application?
<bfig>
how does ruby manage namespaces/we ?
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<td123>
try making it privte
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<workmad3>
bfig, there isn't really a language concept of a pure namespace, but you can place classes inside classes and inside modules as a form of namespacing
<bfig>
modules, what is a module?
<workmad3>
bfig, 'module Foobar; end' <-- that's a module
<bfig>
so you access stuff with Foobar.xx ?
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<workmad3>
bfig, depends what you're accessing... if it's a method on the module, then yes, if it's a constant in the module, then you do Foobar::Whatever, and if it's an instance method on the module, you can only access it by mixing the module into a class and accessing it through the class
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<bfig>
so a module is just like a class?
<workmad3>
bfig, no
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<workmad3>
bfig, you can't create an instance of a module and you can't use inheritance with a module
<workmad3>
bfig, what you can do is organise methods into a module and use them as mixins
<workmad3>
bfig, or you can use them for a form of namespacing
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<bfig>
can you define modules partially or have several files which bring stuff to the same module?
<nat2610>
Sigma00, I'm not saving it ... I thought that the http object was doing it for me ... I guess I'd better google more aroudn that :) thanks
<workmad3>
bfig, incidentally, this would be better explained in a reasonable intro to ruby book or tutorial :)
<workmad3>
bfig, same as with classes in ruby, you can reopen them at any time, letting you add or change a module in several places
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<bfig>
isn't that an invitation to spaghetti^2 code?
<workmad3>
bfig, doesn't tend to be
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<workmad3>
bfig, it generally leads to easier organisation
<workmad3>
bfig, if you're stuck with a large class, you can partition it up into separate modules to group stuff together and assemble it using mixins
<workmad3>
bfig, or you can, as already said, use the reopening to make use of modules as namespaces across an entire library
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<workmad3>
bfig, or you can do more interesting mixins, like those of the comparable and enumerable modules in the standard library, where you create a set of related functionality that relies on a small core of implemented functionality
<workmad3>
why do people always assume that because something can be misused to create bad code that we are all so incompetent that it's a given?
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<td123>
bfig: one nice example of that is the code "1.year.ago"
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<shadoi>
Which is in activesupport, and is not the worlds greatest example of sanity. :)
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<workmad3>
td123, is that an example of spaggetti or of how cool the reopening stuff can be? :)
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<td123>
workmad3: definitely coolness :)
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<banisterfiend>
bfig: open class defs pretty much exist in c# and objc too, it's not unique to ruby, and it hasn't generally resulted in 'spahgetti code'
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<banisterfiend>
though when library authors start monkeypatching unnecessarily it can get annoying :)
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<shevy>
I am a godpatcher
<shevy>
my patches are godly
<shevy>
it however does indeed suck that I can not restore the state of objects to an earlier point :(
<shevy>
or at least the "default" stdlib part without any modifications
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