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<thomas`->
Hi all. I have a question about controllers. If you have all user operations in 1 file and you have all payment operations in another file, where do you put the code that converges both?
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<boobah>
thomas`-: #rubyonrails
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<thomas`->
boobah, k thanks
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<rking>
Hehe, my guard+rspec conf is somehow going crazy. It runs thrice per file modification.
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<rking>
Might have something to do with this startup warning: DEPRECATION: Starting with Guard v1.1 the use of the 'run_on_change' method in the 'Guard::RSpec' guard is
<rking>
deprecated.
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<offby1>
I've seen that a lot but not had your problem
<offby1>
where by "a lot" I mean "every time I do 'rake spec' in the Rails Tutorial"
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* tama
yawns
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<offby1>
NOOOO
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<ibash>
how do I wrap a gem's method?
<ibash>
I tried alias_method s but get stack level too deep when I call the original method
<SeanLazer>
Squee-D: isn't there something like assert_not ?
<Squee-D>
assert_not an assertion?
<Squee-D>
the problem here, is i am testing assertions..
<SeanLazer>
assert_not_identical_set?
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<SeanLazer>
i'm not sure, i haven't used test::unit in a long time
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<Squee-D>
i would be testing a different assertion, or are you suggesting that there is some magic there?
<SeanLazer>
it would be nice if there was some magic there but it appears there's not
<Squee-D>
there is no magic
<rking>
BTW my earlier issue with guard-rspec was resolved by using the git versions of guard and guard-rspec.
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<SeanLazer>
Squee-D: you could just write it as plain ruby?
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<Squee-D>
I'm not sure what you mean.. I think i'll need rescue and look for a particular test-unit error
<SeanLazer>
are you just trying to assert that two arrays aren't equal?
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<_Bairn>
Hey friends.
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<tama>
is there a book that teaches you how to create ruby gems that properly use rake and rspec and rdoc and all that?
<tama>
because i would very much like to buy it, if it exists
<SeanLazer>
okay i have my own question, i'm writing a decorator that mainly wraps ActiveRecord objects and needs to implement as_json
<SeanLazer>
here's my implementation so far, but it uses a class level variable and it doesn't work because the class level variable is shared across subclasses
<SeanLazer>
can someone suggest a better way to do this?
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<Squee-D>
sean im testing set equality.
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<Squee-D>
sean use a class instance variable
<Squee-D>
@json_methods
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<Squee-D>
I generally frown upon @@, it's largely useless (caveat that i may be wrong)
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<Squee-D>
the class instance variable will belong to the leaf class in the class heirarchy
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<SeanLazer>
ah, gotcha
<SeanLazer>
i think the fact that i'm inheriting from BasicObject is going to make this a little trickier but i didn't realize you could do that, thank you
<Squee-D>
in the mixed into class (call it Foo), i call validates_originators :person and then you'll find Foo.originators is [:person]
<Squee-D>
try mixing in :D
<Squee-D>
bblater
<Squee-D>
and your welcome
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<davidokner>
Hi
<tama>
Squee-D: hai!
<tama>
how have you been, Squee-D ?
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<davidokner>
This RubyMonk.com website is probably the best way to learn ruby I've seen. Better than the pick Ax book.
* tama
checks.
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<davidokner>
The Pragmatic studio has a $200 video with online exercise series which might be similar. I think you need interaction. I need to do it to learn it, otherwise I'm just reading about it.
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<cuppsy>
I'm trying to search for a word within a string, but I keep getting: "undefined method `indexOf' for #<String:0x4acf770>". I'm still new... is there something obvious I'm missing here? Shouldn't I be able to do indexOf on a string?
<seanstickle>
You've been eating too much Java again!
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<Peregrinu5>
Can anyone assist with a noob questions relating to string compares? wondering what I am doing wrong in this one liner: print wmioutfile.read.to_s if ["string1","4432","432432","dsaddf"].include? wmioutfile.read
<Mon_Ouie>
You're calling #read twice, but read moves the file cursor
<Mon_Ouie>
So the second read is empty
<Peregrinu5>
ah!
<Peregrinu5>
start with the if :D
<Peregrinu5>
thanks for that
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<bnagy>
also you don't need the to_s
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<Peregrinu5>
mm
<Peregrinu5>
getting it to print is not fun because of that .read issue
<Peregrinu5>
playing back the contents of a file inside of an until blah.eof?
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<Mon_Ouie>
Just store the result in a variable
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<Peregrinu5>
this is true.. :D
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<Hanmac>
if ["string1","4432","432432","dsaddf"].include?(s = wmioutfile.read); print s;end
<davidcelis>
%w(string1 4432 432432 dsaddf)
<davidcelis>
moer liek
* Hanmac
does not like the %*( ... ) stuff
<icy`>
%w ftw
<davidcelis>
that makes one of us
<otters>
probably the only ruby user in the business
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<Hanmac>
PS: in this chase %W is better then %w because all strings does not have any magic
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<icy`>
:o
<icy`>
like #{var} stuff?
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<otters>
yeah
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<icy`>
noted; will use %W from now on
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<Peregrinu5>
perhaps i missed something around the %W aspect
<banisterfiend>
fasta: yes, well, before you install ruby you should research the best way to install it...hint: apt-get install ruby is the worst way to install it ;)
<banisterfiend>
fasta: go here: rvm.io
<Hanmac>
fasta apt-get install ruby1.9-full
<fasta>
Isn't there a command to just get the latest ruby?
<fasta>
I am kind of allergic to specifying version numbers.
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<Hanmac>
fasta, in the next ubuntu the ruby package is changed to link to ruby1.9
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<banisterfiend>
Hanmac: why are you even suggesting he should be using ubuntu packages? tell him to use rvm/rbenv
<banisterfiend>
fasta: use rvm or rbenv, i gave u a link to rvm above: rvm.io
<bnagy>
rbenv ftw
<banisterfiend>
bnagy: have you heard of rbfu?
<banisterfiend>
it's meant to be even more lightweight than rbenv
<bnagy>
rbenv is fine
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<ij>
Is method swapping "A bad thing"? It looks
<ij>
dirty
<hoelzro>
it sounds dirty.
<ij>
By method swapping I mean alias :same, :same_; def same; different code, which uses same_; end;
<hoelzro>
oh, that looks like overriding to me
<ij>
I heard it was called m. swapping here once.
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<workmad3>
ij: it's called method chaining
<ij>
chaining?
<workmad3>
ij: yeah... you're chaining versions of 'same'
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<ij>
hmm, I think chaining is lots of .calls... Like Foo.this.that.giant.trucks.and.the.right.return.in.the.end
<Tasser>
alias chaning iirc
<workmad3>
ij: you frequently alias the existing version to 'same_without_feature' and define your override
<workmad3>
ij: which gives you a way to add new links to the chain without having to worry about overriding an existing link
<workmad3>
Tasser: oh yeah, alias method chain, that's the one :)
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<workmad3>
ij: as for suitability... I believe it used to be used a lot in rails, and they since decided that yes, it's quite nasty, and instead they build up using modules and 'super' calls now
<ij>
Give for an example of Module and super use.
<workmad3>
ij: 'super if defined?(super)'
<ij>
In the original method/
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<workmad3>
ij: that basically calls the method you just overrode from a module or superclass, if it existed
<workmad3>
ij: in any method you want to compose
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<ij>
Show the full example, I still don't get it.
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* apeiros_
still thinks 'alias method chain' to be a horrible term :)
<workmad3>
apeiros_: a horrible term for a horrible monkey patch? :)
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<ij>
workmad3: That sucks. You always have to write the super line. That's not much better IMO.
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<workmad3>
ij: it makes the composition explicit
<workmad3>
ij: rather than hidden in aliases and 'method_x_without_feature_y'
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* Hanmac
try to avoid alias
<ij>
True. Better, but still awful in my opinion.
<apeiros_>
workmad3: true. the thing itself is already horrible
<apeiros_>
but that's no excuse for giving it a horrible name too :)
<richo>
Is there a way to stub in a new definition via a mocha mock? (Yes, I knwo this is a code smell. Totally committed at this point though)
<workmad3>
apeiros_: sure it is... it puts people off :P
<apeiros_>
that rails makes you having to use it is just another sad story
<apeiros_>
it's funny how many anti-patterns I only and only ever had to use in rails
<workmad3>
ij: it's just a method call
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<Hanmac>
i have a system, when i call function_a it calls automaticly feature_a_function_a, feature_b_function_a and feature_c_function_a
<workmad3>
ij: with a guard to make sure the method exists... not awful... I won't say it isn't a little bit annoying, but it's hardly heinous :)
<apeiros_>
Hanmac: me too. I think the only valid use-case for aliasing is semantical identity. e.g. if == and === do the same, then an alias is ok. but something like aliasing map to collect is not.
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<apeiros_>
err, not semantical identity. semantically different methods with the same implementation
<ij>
workmad3: I don't like code that annoys me. Also, I didn't found any super if defined in rails gem.
<workmad3>
ij: and it makes it clear from the method that it's a method that intends to be composed ;)
<apeiros_>
(eql?, ==, === have different semantics, but they may share implementation)
<workmad3>
ij: yeah, that's because the rails gem itself is almost code-free
<workmad3>
ij: it's a meta gem to pull in the dependencies, active-support, active-record, etc
<ij>
Oh, right. Active*
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<Hanmac>
apeiros_ what do you think about tny feature_*_function_* system? (its only for understanding, in my system the methods are named differently)
<apeiros_>
Hanmac: I don't follow
<apeiros_>
is that a naming scheme?
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<workmad3>
Hanmac: I'd worry about ordering and return values
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<Hanmac>
no ... function_a is a virtual function that calls this functions "feature_a_function_a", "feature_b_function_a" and "feature_c_function_a" ... with that i dont need alias
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<workmad3>
Hanmac: if I needed feature_b to be called before feature_a, how would I ensure that? what if I needed the return value of feature_c, but needed it to run before feature_b?
<Hanmac>
workmad3 the ordering is alphanumeric (using sort) and the return value is an Array of the other return values
<workmad3>
Hanmac: so it's purely a way of hiding a group of method calls inside a single call?
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<workmad3>
Hanmac: I don't see the point :P
<Hanmac>
yeah, then you could do: function_a(value).inject(:+)
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<workmad3>
Hanmac: I'd just write an explicit function_a that calls feature_a, feature_b and feature_c
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<Hanmac>
but then i want my script extandable? so i dont know how many features are later in the code?
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<workmad3>
Hanmac: so you add an extra call to the method
<workmad3>
Hanmac: and when the method gets massive, you have it clear in your code that you need to sort it out
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<Hanmac>
"so you add an extra call to the method", but for that i would need alias again
<workmad3>
Hanmac: your way hides design complexity, making it harder to spot when you have classes that are doing too much
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<workmad3>
Hanmac: no... it's your code... you have the method code in front of you, and you add an extra call
<bambanx>
hi
<bambanx>
good morning
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<Hanmac>
workmad3 i designed it for rgss scripts so they could react with eachother (like A and B works parted, but could also work together)
<unixabg>
I have been working on rmagick convert images to video with webrick and I working when I run as root. My issue now is when I try to
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<workmad3>
Hanmac: hmm... sounds like you actually wanted publisher-subscriber mechanism thet
<workmad3>
Hanmac: some event happens in class A, and class B has registered itself as interested in that event, so class A notifies it (using a known interface)
<unixabg>
is the error. Any help with this would be greatly appreciated.
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<apeiros_>
Hanmac: sry, work interrupted
<apeiros_>
got an example?
<workmad3>
Hanmac: it's also known as an event listener, or the observer pattern... lots of names for it :)
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<workmad3>
Hanmac: I'm just always wary of code that magically bundles stuff together and doesn't give me ways to ensure things like ordering :)
<workmad3>
Hanmac: order is frequently quite important ;)
<workmad3>
Hanmac: and having to then wart my names to fit a lexical sort... not nice
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<banisterfiend>
apeiros_: hey, do you use rvm?
<apeiros_>
banisterfiend: yupp
<banisterfiend>
apeiros_: how do u feel about the implied/automatic 'bundle exec' they've got going now..
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<apeiros_>
uh? haven't heard about that. is it opt-in?
<banisterfiend>
apeiros_: no, it's by default
<banisterfiend>
you hav eto explicitly turn it off if u dont want it
<banisterfiend>
apeiros_: it confused me for about a week
<banisterfiend>
none of the gems i was installing i could actually use...
<banisterfiend>
it's a 'feature' apparently
<workmad3>
banisterfiend: doesn't it work on whether you have a Gemfile though? rather than always on?
<workmad3>
banisterfiend: so if you're in a bundler project, it tries to bundle-exec stuff
<banisterfiend>
workmad3: yeah, but often i sit in a project's directory while i try other stuff, like messing around in pry installing gems and so on.
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<banisterfiend>
workmad3: worse than that htough, for projects that use plugins (like pry) none of the plugins i install i can actually test
<workmad3>
banisterfiend: :)
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<apeiros_>
banisterfiend: if it's opt-out, then I don't like that part.
<apeiros_>
but at least you can opt-out.
<apeiros_>
I don't think it should be rvm's responsibility to auto-bundle-exec.
<apeiros_>
but I'll have to look at how/what they did to make a real judgment
<banisterfiend>
apeiros_: i agree, too much magic. And i dont think this major change was communicated effectively
<banisterfiend>
i'd be less pissed off if i'd known about it and told how to opt out, so that i didnt waste my time and confusion wondering wtf was going on
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<faitswulff>
banisterfiend: what major change are you and apeiros talking about?
<banisterfiend>
faitswulff: rvm now auto bundle exec'ing if it sees a Gemfile
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<Mon_Ouie>
How do you disable it though? I can't seem to find documentation about it
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<banisterfiend>
Mon_Ouie: export NOEXEC=0
<banisterfiend>
Mon_Ouie: yeah that's teh stupid thing, ther'es no documentation on it, barely any mention of it
<faitswulff>
banisterfiend: ah, thank you
<banisterfiend>
and this is big change
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<Mon_Ouie>
It seems to see this only happens if you install the rubygems-bundler gem
<banisterfiend>
Mon_Ouie: it's default not, even if u dont intsall it i think
<banisterfiend>
now*
<banisterfiend>
Mon_Ouie: when did u last upgrade rvm?
<apeiros_>
banisterfiend: a good strategy would probably have been to ask the first time it did it whether it should
<hoelzro>
is there a way to turn a Proc into an UnboundMethod?
<Mon_Ouie>
Ah, yeah I just missed the line that said it installed it by default :p
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<workmad3>
banisterfiend: ah, it just installs the rubygems plugin by default?
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<workmad3>
banisterfiend: I much prefer the --binstubs approach
<banisterfiend>
workmad3: i think so yes
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<workmad3>
banisterfiend: yeah, it's just in $rvm_path/gemsets/global.gems and then installed into @global
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<banisterfiend>
workmad3: do u like it
<workmad3>
banisterfiend: I just disabled it... I like the binstubs approach
<banisterfiend>
workmad3: what's the binstubs approach
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<workmad3>
banisterfiend: you install with 'bundle install --binstubs', bundler generates wrappers for the gems in the bundle in (by default) ./bin, and then rvm has a hook you can enable to add that directory to your $PATH
<workmad3>
banisterfiend: if the gem isn't in the bundle, no wrapper is generated so it goes through to the normal gem path, otherwise it hits the wrapper and enables bundler
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<workmad3>
banisterfiend: the rvm hook is just because you can specify the bin dir too... if you go for something like '--binstubs=./bundler-bin' then you could always add ./bundler-bin to your $PATH all the time and not have to enable the RVM hook
<workmad3>
(which is an after-cd hook, so probably relies on rvm's cd function override)
<Tasser>
HAPPY INTERNATIONAL CAPS LOCK DAY
<banisterfiend>
workmad3: cool, i like that approach too. i hate the current one, it's almost reason enough to switch to rbfu as a way of saying FU to them
<workmad3>
banisterfiend: RVM supports both, which is the annoying thing
<banisterfiend>
RVM is getting ridiculous, have u ever run 'rvm help' ?
<banisterfiend>
a vomit of so many options and blergh that it floods off yoru screen
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<workmad3>
banisterfiend: hell, I don't see why RVM couldn't have gone with a cleaner integration with --binstubs rather than rubygems-bundler
<workmad3>
the rubygems-bundler approach seems too intrusive
<banisterfiend>
workmad3: pls complain on #rvm maybe he'll change his mind if more people join a chorus against it. He just kind of slipped it in ther ehoping no one would notice
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<ssa>
new to ruby here
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<ssa>
why do some projects access attributes set using attr_accessor with self.myattr, and others just myattr?
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<hoelzro>
ssa: I'd say style
<hoelzro>
also, self.myattr is explicit
<hoelzro>
it says "hey, myattr is *not* a variable!"
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<hoelzro>
"and don't you forget it"
<ssa>
i understand that
<banisterfiend>
ssa: also if u want to use a setter then u *have* to use self.myattr = blah
<hoelzro>
oh, good point
<hoelzro>
I didn't even think of that!
<ssa>
but that also means a class (not it's instance) can't have a method called self.myattr which would do something else
<ssa>
banisterfiend: ah good point!
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<hoelzro>
ssa: sorry, what do you mean by that first bit?
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<ssa>
hoelzro: in objective-c, where i come from, self always refers to instance objects
<ssa>
hoelzro: so you could have a +myattr (class method) and a -myattr (instance method), both doing different things
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<hoelzro>
ok
<ssa>
hoelzro: but in ruby, am i right that i cannot define a separately behaving method named self.myattr, because the class also has an attribute called so?
<ssa>
also since @myattr is available to both instances and class/module, it's quite confusing
<ssa>
based on how i would have structured the usage of that class or it's instance
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<hoelzro>
you may define a myattr method as both a class and instance method, I think
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<Hanmac>
ssa: an class is an instance too so it can have instance_variables
<ssa>
Hanmac: ah
<Mon_Ouie>
And they aren't related to the ivars of its instances at all
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<yellow5>
hoelzro: that is correct, you can define methods with the same name for the instance and the class that do not collide
<ssa>
Out of def self.myattr and def myattr, which one gets called when i read from self.myattr?
<hoelzro>
ssa: depends on if you're in a class method or instance method =)
<Mon_Ouie>
That just depends on what self is
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<ssa>
hoelzro: ah! context matters
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<ssa>
Mon_Ouie: right. like Hanmac said, self could be the class instance as well.
<ssa>
my mind's clear about this now
<Mon_Ouie>
class Foo; puts self; end # => Foo
<ssa>
s/mind's/mind is/
<ssa>
true
<Mon_Ouie>
(will actually # => nil but you get my point)
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<ssa>
actually, i remember reading that in fact even class is not an instance, it just behaves like one.
<Mon_Ouie>
I'm not sure what you mean. A class *is* an instance of the Class class.
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<ssa>
so "class" is a dsl to Class.new?
<workmad3>
ssa: it behaves a bit differently
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<workmad3>
ssa: 'class' is a keyword... but it does create an instance of the class Class
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<ssa>
workmad3: okay
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<ssa>
Is "validate" a reserved keyword?
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<ssa>
textmate highlights "validate" in a different color (the same as other reserved keywords)
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<ssa>
Google could help me if active record validations didn't exist. haha
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<apeiros_>
ssa: no. but it's probably highlighted because of rails
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<ssa>
apeiros_: ah, thanks, it had the wrong scheme selected. thanks again!
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<fasta>
gem1.9.1 install watir-webdriver => results in failure
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<ifnspifn>
aperios_: is there any way I can execute code in a %{}? when I use #{}, it doesn't have access to the value variable that gets placed in %{value}
<apeiros_>
you can't have arbitrary ruby code in it, though. so %{/[^A-Za-z0-9_\-]+/.match(value)[0]} can't work
<apeiros_>
ifnspifn: use tab completion. makes you not typo nicks.
<ifnspifn>
apeiros_: ah, many thanks :]
<apeiros_>
ifnspifn: no. %{} is a simple key only. no code allowed.
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<ifnspifn>
hm. Is there any way I can access %{key} inside of code? perhaps a binding to a variable?
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<ifnspifn>
more specifically, the value variable in .match() is undefined at runtime, even though %{value} prints the expected value
<Mon_Ouie>
Can you show an actual example?
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<ifnspifn>
apeiros_, Mon_Ouie: "%{value} contains an invalid character: #{/[^A-Za-z0-9_\-]+/.match(value)[0]}"
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<apeiros_>
ifnspifn: as said, no, you can't
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<apeiros_>
you have to do the matching outside of that
<Mon_Ouie>
value = "foo +/ bar"; puts "here: #{/[^A-Za-z0-9_\-]+/.match(value)[0]}" # prints the corect result
<apeiros_>
which in turn (in 1.9): value[/[^\w-]+/]
<apeiros_>
ifnspifn: using that in rails localizations?
<ifnspifn>
this string is being passed to :message in an ActiveRecord validates definition (this is a rails question, I know)
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<ifnspifn>
I believe so, but I'm very unfamiliar with rails
<apeiros_>
ok. then as I said. you'll have to do the processing in the validator
<ifnspifn>
as such, I've no idea what can be passed in ":message => ..."
<apeiros_>
you can't have it in the string definition
<apeiros_>
you shouldn't have code in locales anyway.
<ifnspifn>
can I pass a block to :message?
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<apeiros_>
o0
<Habib>
hey everyone. what ide to use in linu?
<Habib>
linux
<apeiros_>
you are the implementer of that custom validator, right?
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<ifnspifn>
apeiros_: yes
<apeiros_>
that's where you do it. anyway, that part is a #rubyonrails question
<ifnspifn>
this is in the model, if that helps
<ifnspifn>
funny enough, I'd asked this in #rails, which I assumed to be the RoR room
<ifnspifn>
thanks, apeiros_ :]
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<apeiros_>
nope, #rails is pretty much useless
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<joel>
I've got a ruby program that creates three threads, I call join on those three threads so the main program doesn't exit until they are finished. For some reason a data structure that gets passed into the third thread never comes in "cleanly", even though its clean before going in. thoughts?
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<Spooner>
How do I find out the class from its metaclass?
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<apeiros_>
I don't have a ruby program that creates three threads. problem solved :o)
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<apeiros_>
Spooner: no sane way
<apeiros_>
Spooner: it's the same problem as "find all instances of class X"
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<apeiros_>
it can be done using ObjectSpace.each_object. but that's insane.
<Spooner>
No, I don't want it that badly :)
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<joel>
apeiros_...
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<fowl>
ahoy Spooner
<Spooner>
Hi fowl
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<Spooner>
Given up on games?
<fowl>
nah im just trying different things
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<fowl>
Spooner, im working ona game in nimrod right now
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<sirupsen>
given an array of objects that respond to #key and #value, where some of these #key methods return the same, I'd like to create a hash where all the #value s for a #key are added together, like: r = {}; array.each { |e| r[e.key] = e.value }; return r — doesn't seem very Ruby-ish though, anybody got a better suggestion?
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<apeiros_>
sirupsen: see group_by
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<apeiros_>
sirupsen: r[e.key] = e.value isn't really "adding together", though
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<joel>
is there a way to pp the data passed to a subroutine without naming each item?
<sirupsen>
apeiros_: sorry, +=
<apeiros_>
by item, you mean argument?
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<sirupsen>
so I'd have to have to set the value to 0 if it's not already a number
<apeiros_>
sirupsen: that code will fail then… nil += e.value won't work
<sirupsen>
hence my edge-case fix^^
<apeiros_>
group_by + map + inject
<sirupsen>
man
<sirupsen>
:D
<apeiros_>
or just: r = Hash.new(0); …your loop…
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<AxonetBE1>
if I have @orders_pending && the string "orders_pending" from params how I can get the object @orders_pending then?
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<hoelzro>
AxonetBE1: instance_variable_get
<hoelzro>
also, don't forget to validate
<hoelzro>
like crazy =)
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<Synthead>
is there a way to make an external command echo as it's being ran? kinda like `echo test && sleep 3 && echo test 2`: this would display "test" right away, then "test 2" 3 seconds after
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<ramblex>
Synthead: system('cmd')?
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<Synthead>
ramblex: ahhh, there we go :)
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<Synthead>
ramblex: is there a way I can capture the output and put it into a block in real-time? I'm looking to add a time stamp to the output. system('cmd') do { |x| something_with x } maybe?
<Synthead>
s/do //
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<ramblex>
I think I've used popen4 in the past to do something similar
<Synthead>
ramblex: any way I could do this without a gem? popen4 looks good though
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<cout>
Synthead: popen() is fine
<cout>
popen4 is if you need both input and output
<cout>
and pid
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<cout>
so IO.popen('cmd') do |x| ... end
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<Synthead>
I uninstalled open4 and now I get INFO: gem "open4" is not installed. What does this mean? was it a "system" gem?
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<Synthead>
is Disk an internal class in ruby?
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<ortho_stice>
Hi all, debugging tools question. I have a Perl background, and I miss doing 'perl -d script.pl'. (That starts the perl interpreter, and then stops before the first runtime statement - at which point you can step through the code). I have a misbehaving ruby script that I'd like to step through. irb is interactive, but 'irb scriptname ...' doesn't halt at the first statement - it just runs through, and I hit the
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<ortho_stice>
fowl: that looks promising. Many thanks!
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<Mon_Ouie>
Synthead: That error message means nothing more than what it says: that gem isn't installed
<ij>
Can ruby's case fallthrough?
<Mon_Ouie>
ij: Nope
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<Synthead>
Mon_Ouie: but the script doesn't require it
<ij>
Oh, I still can when x || y
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<Mon_Ouie>
ij: Probably what you want is "when x, y"
<xclite>
Synthead: probably more likely is you don't name it in a require in your script, but something you do require transitively causes you to require open4
<Mon_Ouie>
Synthead: If you try to require a file that isn't in the load path, ruby raises a LoadError, it wouldn't print an informative message
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<Mon_Ouie>
However, rubygems does print that message when you try to uninstall a gem that isn't installed — and thus, there's nothing that needs to be done
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<xclite>
Synthead: wait, if this isn't being printed when you run a script, what script are you talking about not requiring it?
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<shevy>
Synthead does not write back!
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<xclite>
shevy: apparently not haha
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<digitalcakestudi>
how can I do a similar split but with commas? split(/\s+/)
<rippa>
split /,+/
<digitalcakestudi>
thanks
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<cakehero>
I want to find the default installation options for a gem - how would I do that?
<cakehero>
Someone overwrote one of the defaults when they installed it by passing it to gem install, but, I don't know how to figure out what the default would have been if they didnt'
<Hanmac>
digitalcakestudi: shouldnt split ',' works the same?
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<xclite>
Hanmac: try to split "1,,2"
<xclite>
Hanmac: with each option
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<Hanmac>
xclite: yeah the result is different, but it depends what he wants
<Hanmac>
i may that he wants to parse CSV files
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<xclite>
Hanmac: my point is they don't work the same
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<Mon_Ouie>
If he wants to parse CSV files, he should use the CSV module
<Mon_Ouie>
CSV isn't a complicated format, but it's more than just split(",")
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<epochwolf>
Mon_Ouie: CSV is complicated because it's not standardized very well.
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<digitalcakestudi>
Sorry I meant I need a watch for both the space and the comma for example I have a list of "1, 2, 3" but it turns into "1" " 2" " 3" with the two and the three both having an extra space infront
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<digitalcakestudi>
I tried split(/,\s+/)
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<davidcelis>
and that didn't work?
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<davidcelis>
but like Mon_Ouie said, you should use something like FasterCSV if you're gonna be doing CSV parsing
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<digitalcakestudi>
its for a tagging system
<davidcelis>
you can't depend on whitespacing around commas. CSVs, in fact, should not have whitespacing around commas
<davidcelis>
they,should,be,formatted like,this
<digitalcakestudi>
so a blog post has "music, tv, some video game, ect"
<davidcelis>
ah, tags
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<davidcelis>
so why didn't your split work?
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<davidcelis>
you should really be doing something more like .split(/\s*,\s*) though
<digitalcakestudi>
I just found out that the front it is trying to wrap the many words with "
<davidcelis>
because you shouldn't expect whitespacing
<digitalcakestudi>
I ended up split(", ")
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<davidcelis>
so as soon as someone enters a list of tags like "music ,tv,some video game", your system breaks
<digitalcakestudi>
good point did not think of that
<davidcelis>
i'd recommend the split i mentioned above
<digitalcakestudi>
(/\s*,\s*) will help with that?
<davidcelis>
or you could .split(",").map(&:strip)
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<davidcelis>
but not having to map is better
<digitalcakestudi>
I'm already having to make for the name @keywords.split(", ").map do |name|
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<digitalcakestudi>
cause then I check to see if the tag is already a row before making a new one
<davidcelis>
well if you're already feeding into a map
<davidcelis>
then just .split(",") and do a name.strip before you do anything else in that map
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<digitalcakestudi>
thanks davidcelis
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<digitalcakestudi>
so how can I work in the proc with the map? .split(",").map &:strip do |name| ?
<digitalcakestudi>
sorry I know thats a noob question
<davidcelis>
no, call .strip on your block variable inside thep map you already have
<Mon_Ouie>
split /\s*,\s*/
<davidcelis>
you can't pass two blocks
<davidcelis>
but i agree, i still think the split i mentioned before is better
<davidcelis>
though if there are spaces after the last value, those will end up getting passed through
<Mon_Ouie>
Oh, already suggested
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<digitalcakestudi>
sorry got confused, makes sense now.
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<digitalcakestudi>
errr regular expressions can burn your brain. :)
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<bj0ern>
I always use this when I get confused: regexpal.com
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<JustinCampbell>
theres a great app called Patterns in the mac app store
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<bj0ern>
oh, thanks. that looks great.
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<shevy>
bugs bugs bugs...
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<bj0ern>
also very interesting, thanks :)
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<panzi>
is there a way with Curl::Easy (or any other http client lib) to only download a page if it has a certain COntent-Type (e.g. text/html) and is not bigger than a certain size?
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<panzi>
I need this for some very simple crawler that shall fetch images from an url, in case an url points to an html page
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<Mon_Ouie>
Just do a head request then a get if the header matches what you need?
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<panzi>
Mon_Ouie: *facepalm* you're right
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<Synthead>
xclite: my own script
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<Synthead>
Mon_Ouie: it isn't required in my script
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<jfischoff>
I have a rake file and one step produces files. I want to make tasks based on the generated files. i don't know what they are at the start. What is the right way to handle this situation?
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<shevy>
yay! Synthead has returned \o/
<Synthead>
schickung: hahaha
<Synthead>
OOPS
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<Synthead>
shevy: ^
<shevy>
Synthead makes it easier to solve problems when the replies are quick to come :P
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<shevy>
Synthead have you considered trying to use a thread yet?
<Synthead>
shevy: heh, sorry man :) work calls
<schickung>
Synthead: ??
<shevy>
I see I see
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<Synthead>
schickung: sorry bout that :)
<shevy>
well then beat up the work!
<Synthead>
hahaha
<Synthead>
all day err day
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<schickung>
Synthead: ok.... cu
<Synthead>
shevy: I thought it was unusual that I installed popen4, then uninstalled it, now I'm getting errors. did this "upgrade" an existing gem, do you think?
<shevy>
hmm you used "gem install popen4" ?
<shevy>
Fetching: Platform-0.4.0.gem (100%)
<shevy>
Fetching: open4-1.3.0.gem (100%)
<shevy>
Fetching: popen4-0.1.2.gem (100%)
<Synthead>
shevy: yeah
<shevy>
gem uninstall popen4
<shevy>
Successfully uninstalled popen4-0.1.2
<Synthead>
exactly
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<shevy>
seems it fetched the dependencies, via uninstall only popen4 is removed
<Synthead>
shevy: and when I run any script, it complains about it
<shevy>
I assume require 'open4' would work
<shevy>
hmm
<shevy>
it says "can not find popen4"?
<Synthead>
theeere we go
<Synthead>
shevy: no, I didn't require it and I still got errors
<shevy>
well that sounds odd
<shevy>
perhaps one of the other two gems tries to require it
<Synthead>
shevy: yeah, agreed
<xclite>
shevy: that's what I said an hour ago!
<Synthead>
shevy: yeah, I uninstalled open4 too and bam
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<Synthead>
xclite: hahaha ... I was "testing"
<shevy>
yeah open4 has popen4 specific code
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<shevy>
hmm
<shevy>
or perhaps not
<shevy>
lib/open4.rb: alias open4 popen4
<shevy>
just aliases :P
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<Mon_Ouie>
You said it printed "INFO: gem "…" isn't installed", that doesn't look like an error message
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<moos3>
if i do output = var.split('/').last how do i get the string out with out the => nil
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<shevy>
nil what nil where
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<bricker88>
Can anyone explain this behavior? https://gist.github.com/3013061 That last command, I thought, should make a query
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<moos3>
fowl thanks
<bricker88>
Actually I think I see why that wouldn't be the case maybe - I'm settings an instance variable on the class, not an instance of the class
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<bricker88>
maybe?
<fowl>
bricker88, you know when you set @ar_records to nil its going to reset to BlogCategory.all
<Mon_Ouie>
There is no instance of the class
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<Mon_Ouie>
So BlogCategory.all does get called twice
<bricker88>
fowl: Yes, that is what I'm trying to accomplish
<bricker88>
fowl: so that I can make a new query next time the ar_records method is called
<fowl>
bricker88, blogcategory caches its results?
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<fowl>
bricker88, def WP::Category.raw_arrecords() @ar_records end
<bricker88>
fowl: I'm just storing the results in that instance variable so it doesn't have to make a new query every time - I only reset the variable when I know something has been updated, so that I can make a new request
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<fowl>
bricker88, why dont you start looking up the stack then, if you want it to run a new query you should know where the first query is ran
<fowl>
do show-method BlogCategory.all
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<fowl>
then kick yourself for not using pry
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<fowl>
assuming that the problem isnt the SQL of course
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<elbee19>
Hello, does anyone use ruby with linux here?
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<Hanmac>
elbee19 i do
<epochwolf>
elbee19: nope, ruby doesn't support linux.
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<rking>
It's the connectors.
<epochwolf>
:P
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<rking>
When you use Ruby on Linux it melts the connectors.
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<rking>
No good.
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<elbee19>
Hanmac, I have JUST started learning Ruby. I'm trying to type ("ruby -e puts '22'") on the terminal, but it doesn't show up anything. The same works on the windows command prompt. Am I doing something wrong?
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<elbee19>
sorry for the ambiguity, I mean I'm typing this > ruby -e puts '22'
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<Kwpolska>
elbee19: what "terminal"?
<elbee19>
epochwolf, thank you. You response was immensely helpful :P
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<elbee19>
Kwpolska, ubuntu terminal
<Hanmac>
elbee19 start irb, its better for learning
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<elbee19>
Hanmac, yes, irb does work. i was just wondering why this isn't working.
<eph3meral>
elbee19, you probably mean gnome-terminal technically
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<eph3meral>
elbee19, there is no such thing as "ubuntu terminal"
<eph3meral>
fyi
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<elbee19>
eph3meral, Oh ok. Thank you for the correction. I have barely any experience with Ubuntu, Ruby or IRC actually
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<Hanmac>
you need this: ruby -e "puts '22'"
<Hanmac>
not this: ruby -e puts '22'
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<elbee19>
Hanmac, yes that works. Thank you so much. Damn I feel dumb
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<epochwolf>
you should
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<Hanmac>
you are only human :P
* epochwolf
takes offense at being called him
<epochwolf>
human*
<elbee19>
epochwolf, Yes, I reaffirm.
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<graspee>
epochwolf: that was epic: you insulted someone, interpreted something as an insult to you when it wasn't directed at you and wasn't an insult and made a typo, all in three lines
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<epochwolf>
graspee: :) I try
<epochwolf>
graspee: when someone askes if anyone uses ruby on linux, I can't resist.
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<elbee19>
asks you meant
<elbee19>
:P
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<epochwolf>
elbee19: congrats, you have bested me at spelling.
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<elbee19>
epochwolf, I try
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<elbee19>
Okay gotta go be human at a few other channels. Hanmac, thanks again. epochwolf , later
* epochwolf
watches elbee19
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<shevy>
epochwolf strike with teeth and claws
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<epochwolf>
shevy: later, I'm on duty right now
<Hanmac>
and one time in a month, at newmoon he turns into an windows-user
* epochwolf
switches his kvm to the windows machine
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<epochwolf>
okay, no guild wars updates
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<shevy>
lol
<shevy>
downgraded to a windows wolf
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* epochwolf
prefers mac
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<eph3meral>
hey windows isn't all bad
<eph3meral>
just mostly bad
<epochwolf>
eph3meral: I have one machine with Windows 7 just for games.
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<shevy>
that's about the only use case left for windows these days
<shevy>
with windows 8, they admit their defeat. they no longer shape the desktop world, they FOLLOW the HTML5/CSS/Javascript evolution passively all of a sudden
<eph3meral>
heh, actually it *is* the only use case left :P
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<shevy>
well there are still many of those office-windows users out there
<shevy>
but I mean like especially the gamers, are mostly younger folks
<eph3meral>
yeah but the office users only really exist because of legacy/tradition
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<jstew>
Well, there are low income families that can only afford cheap acers too.
<eph3meral>
heh, true
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<eph3meral>
and actually there's not much else quite as comprehensive in terms of domain-logon type systems with integrated groupware
* jstew
installs linux on his family member's PCs.
<eph3meral>
SBS is pretty common in the big financial corps etc
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<jstew>
Unless they really *need* windows. Most don't and are happy that they don't get viruses.
<eph3meral>
yeh, if they don't need/want games, but heck, even if they do, there's a bunch more games for *nix these days
<eph3meral>
free to play stuff
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<eph3meral>
not the hot titles, but if Cruchy-O's are good enough for your kids, these are too :P
<jstew>
Haha! True, very true...
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<jstew>
If my 10 year old can use it, so can anyone else. We wrote a game with the ruby gosu library that we presented at a local barcamp. Pretty cool stuff.
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<eph3meral>
cool
<eph3meral>
jstew, have you considered trying logo with him/her?
<eph3meral>
jstew, they've got that book, The Great Logo Adventure, totally kids oriented
<jstew>
eph3meral: Does logo even exist for modern computers? I started out with that on the commodore 64
<eph3meral>
it's pretty powerful too
<eph3meral>
yep it does
<eph3meral>
there's even a full on 3d asteroids clone, written in logo
<jstew>
Sweet! I'm going to check it out.
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<aszurom>
I like turtles
* aszurom
seemed the time for that
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<eph3meral>
lol
<jstew>
I'm just happy that she'll sit down with me at the computer.
<eph3meral>
and it was :)
<jstew>
haha
<eph3meral>
jstew, yeah that's pretty cool, i bet the logo thing could/would be enough of another interesting/fun/easy/different thing that you could get some more mileage out of that tendency in her
<eph3meral>
jstew, the one I remember off the top of my head is UCBLogo
<eph3meral>
is kara anything like Karel the Robot?
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<jstew>
We started out with kids ruby... It's a full limux distro with hackety hack and a few other cool things.
<jstew>
UCBlogo.... Hmm. Evernoting that
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<eph3meral>
jstew, i've mostly played with MSWLogo which is a windows version
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<eph3meral>
jstew, but I did play with linux versions, there were two I recalled, but only one of them was worth anything or still maintained or recently updated, don't remember exactly
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<aszurom>
if I have an array and I'm using array.each to iterate through it, and I decide I want to discard the element I'm currently on...?
<eph3meral>
jstew, and I think UCBLogo was the good one of the two i played with on linux, but just suffice it to say there's really only two good implementations on linux, UCBLogo is one of em
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<eph3meral>
aszurom, Array#select
<aszurom>
can you use that in a sentence?
<Mon_Ouie>
I think you want the "next" keyword.
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<aszurom>
array.each do
<eph3meral>
aszurom, sure
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<aszurom>
here's what I want to have happen in plain english
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<aszurom>
the array is a CSV file
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<aszurom>
so it'll be [a,b,c,d,e,f] for each element
<aszurom>
you mean there's not an AOL keyword for it?
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<eph3meral>
aszurom, you may prefer Array#delete_if
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<eph3meral>
they're pretty similar
<eph3meral>
one works in place, the other doesn't
<aszurom>
ok
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<Mon_Ouie>
select's in place variant is select!
<Mon_Ouie>
(or keep_if with a very small variant)
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<eph3meral>
keep_if is the same as select!
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<Mon_Ouie>
They don't return the same thing
<eph3meral>
ah, nm then
<Mon_Ouie>
[1].select!{true} #=> nil
<Mon_Ouie>
keep_if always returns the array
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<aszurom>
yeah, I was debating if I wanted to just step though the file one line at a time and build an array conditionally on the contents of the row, or actually read the whole csv in and then weed out the rows I don't want
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<eph3meral>
aszurom, i don't think it matters much
<eph3meral>
aszurom, I would personally probably tend to do things in "whole batches" so, read the file entirely
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<eph3meral>
then, in classic "functional style" map/reduce/etc until you've got what you want
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<horrror>
which is ruby'st best book?
<horrror>
so ror book is required. if there are any recommendations..
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<eph3meral>
horrror, try #rubyonrails
<horrror>
and for Ruby?
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<Hanmac>
horrror: the best way is to learn ruby frist ... and ror later
<horrror>
i know ruby
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<shevy>
ack
<shevy>
rubyonrails book???
<shevy>
horrror, these scary people hide on #rubyonrails
<horrror>
and a ruby book?
<horrror>
for reference
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<zamn>
hey how would i go about setting up a timer in ruby
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<shevy>
horrror the pickaxe book is ok
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<zamn>
well, what can i use
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<shevy>
zamn define timer. Thread.new { loop { sleep 1; puts 'zamn is doing fun with ruby' } }.join
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<zamn>
well i guess that leads into my second question
<zamn>
what is the scope of a Thread
<zamn>
meaning if I define a thread (like above) inside of a class can it access the classes instance variables?
<heftig>
sure
<zamn>
heh okay
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<zamn>
im used to java where you have to make a whole new class that overrides the Thread interface *just* to make a new thread :p
<heftig>
the closure you give to the thread is its context
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<zamn>
heftig: what do you mean the closure
<zamn>
i was asking about instance variables
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<yfeldblum>
zamn, blocks, procs, and lambdas are also known as "closures"
<zamn>
since when were lambdas also known as closures
<yfeldblum>
zamn, closures in ruby have a `self`, which is how instance variables are found, so if you give a block to Thread.new, that block's self will be the self of whatever created it
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<yfeldblum>
zamn, in ruby they are, since they close over the local scope
<shevy>
class.c:rb_obj_methods(int argc, VALUE *argv, VALUE obj)
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<tds>
weird
<shevy>
" Returns a list of the names of public and protected methods of "
<shevy>
class.c has the rdoc docu though
<Mon_Ouie>
All that's missing is the /* in class.c */ comment
<`damien>
Hey all! I'm trying to figure out how to profile the memory usage of rake task, has anyone done this before?
<Mon_Ouie>
to make rdoc find the method
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<unixabg>
That is the code that works in my webrick instance if I run as root. However if I run as non privlaged user I get that error.
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<tds>
Hanmac: just realized today that they are infinitely recursive
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<unixabg>
xclite: with ruby 1.8.7 (2010-08-16 patchlevel 302) [x86_64-linux]
<xclite>
unixabg: what other files did you check against? it looks like you're writing right into root, which is generally not gonna work unless you have sudo permissions
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<unixabg>
xclite: that was just sample example, I can do things like FileUtils.touch('/var/lib/ifetch-tools/touchfile.txt')
<unixabg>
and FileUtils.mkdir('/var/lib/ifetch-tools/v1')
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<xclite>
unixabg: can you paste me the results of "ls -l /"
<xclite>
?
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<xclite>
I suspect your user has write permissions to /var but not /path
<unixabg>
xclite: why would it allow me to touch files and mkdir in the /var/lib/ifetch-tools folder?
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<unixabg>
xclite: here is a ls of the /var/lib/ folder with the ifetch-tools folder drwxr-xr-x 4 ifetch-tools ifetch-tools 4096 Jun 28 15:52 ifetch-tools/
<unixabg>
I have spent some time testing and I do not think it is a permission issue on the folder, but something with rmagick/imagemagick.write.
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<xclite>
unixabg: you didn't make those while sudod? with the same permissions i get permission denied with file.mkdir
<xclite>
fileutils.mkdir
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<unixabg>
as default user I can create dirs and touch files in the /var/lib/ifetch-tools folder. But the img.write() call only seems to work as root
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<tintin>
Anyone?
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<Spooner>
Ask your question, if you have one :)
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<workmad3>
Spooner: no... don't say that to tintin... don't open the can of worms!
<workmad3>
I mean... hi tintin :P
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* apeiros_
hands Spooner pandoras box
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<apeiros_>
enjoy!
<Spooner>
I'll shut up next time :P
<tintin>
lol
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<workmad3>
Spooner: it's ok... if you close it quick enough you can trap all our hope!
<apeiros_>
Spooner: just don't forget - *if* you open it, at least look down to the bottom… where the the hope lies…
<apeiros_>
damit :D
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<Spooner>
Seems like a lot of trouble. Opening and closing it all by myself. *ponders how many rubyists it takes to use Pandora's box safely*
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<tintin>
lol
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<apeiros_>
Spooner: 7
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<saneshark>
Is there a way for a subclass which inherits from a superclass to add a method to the superclass? something like def self.class.METHODNAME ?
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<saneshark>
i want to avoid using class variables, but not sure there is a more elegant way
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<cirwin>
saneshark: you can get at the super-class with self.ancestors
<cirwin>
it's probably nicer to do that at method invocation time, and not define a method
<cirwin>
(self.class.ancestors even)
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<apeiros_>
saneshark: sounds like a design flaw. seriously.
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<jarred>
What method can I read query string options from using Sinatra? I tried params (like in RoR) but it's throwing a "can't convert nil to Hash" exception
<saneshark>
so lets say i'm writing a blackjack application , and Dealer and Player both inherit from User… I should be able to get Player.dealers_first_card -- just pull that value without being able to modify it
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<saneshark>
I could I suppose abstract it out into a separate "Game" class, but this coding challenge specifically says User should be able to view Dealer's initial card… so i can't think of a better way of doing that
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<saneshark>
cirwin: i agree with you on design flaw… this is not the approach i would take, i'd create a separate game class
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<rasmusth>
can I define reader and writer attributes to use a different variable name, than the attribute name?
<rasmusth>
if I for instance want my variable to be called _my_var
<rasmusth>
but the reader to be my_var
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<shadoi>
don't do that.
<shadoi>
You can define whatever methods you want though.
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<shadoi>
attr* are just convenience methods
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<saneshark>
General logic related question for something I have to write: Given that Dealer < User, how do you interpret "As a User I can see what card the dealer is showing"
<teratoma>
how would i generate this by iterating over the list here?
<davidcelis>
Gavilan: yes, I know what code smell is
<saneshark>
it's all common sense and logical to me, and i've implemented everything -- but i can't figure out how to do that one statement without introducing "class variables" <--- something i prefer to avoid
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<davidcelis>
Gavilan: Just explain; I'm a developer too. If for some reason I don't understand a term you use, I'll ask
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<saneshark>
to me all the User related methods i need to create appear to indicate that Dealer and Player should inherit from User… except for the one that says User, should be able to see Player's first card
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<saneshark>
am I missing something from a logical standpoint?!?
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<saneshark>
maybe it's a typo? i can't imagine they want me to write bad code -- it's an awful pattern to have a parent class access subclass methods, and the alternative of using class variables isn't much better, especially since it would need to be initialized to some arbitrary value in the parent class
<Gavilan>
snapcase: The dealer and players shouldn't know what cards they got....
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<saneshark>
Gavilan: yes, player should be able to see dealer's initial card (that's how blackjack works).
<Gavilan>
davidcelis: It's a code smell because a Dealer is a temporary role... A user it's more "permanent" in that context...
<Gavilan>
saneshark: That's how blackjack works, but not how you should model it in a PC...
<davidcelis>
Gavilan: Ah that's a good point
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<Gavilan>
saneshark: Why dealer shouldn't be a user? because a user seems to mean a Person... an a Dealer isn't a person...
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<Gavilan>
in that game... the tests suggest it's automatic, and he stays at 17...
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<Gavilan>
BTW: you should also contemplate the fact that in an other "context" the dealer might be a user...
<saneshark>
Gavilan: I totally agree with you, but wouldn't you interpret the statement "As a User I can see what card the dealer is showing" as meaning something to the effect of @player.dealers_first_card @user.dealers_first_card?
<Gavilan>
You may have a lot of players, and a dealer, and you could change who the users are, and who are pc simulated...
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<Gavilan>
saneshark: No... What about if you have multiple games?
<Gavilan>
with the same dealer and players at the same time?
<Gavilan>
The "state" of the game... Should be "variables" of the game...
<Gavilan>
Not the state of the player, nor the dealer...
<saneshark>
Gavilan: yes i agree, but the only way to do that would be to have a class variable for what the dealers shown card is, right?
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<saneshark>
Gavilan: this is a stupid exercise in my opinion, there has to be a type in that statement
<saneshark>
I assumed, they want me to write a TEST for each of these statements, and then get those tests to pass
<saneshark>
if i do that, i will have to introduce some pretty awful design, so what the hell are quizzing me on? my ability to write shitty code?
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<saneshark>
which leads me to believe it is a typo, but maybe i'm missing something!??
<Gavilan>
saneshark: Why not do a "Great design"?
<saneshark>
Gavilan: this is what i prefer, naturally. :)
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<saneshark>
Gavilan: I just want to make sure that i'm not misinterpreting the directions here… i'm about to create a Game class, and within the Game class my instances of Dealer and Player are set so to me it would be fine to just do @dealer.show_top_card
<saneshark>
no reason to have @player.show_dealers_top_card
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<saneshark>
and if they tell me i did it wrong, i'll tell them that i wanted to avoid using class variables
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<saneshark>
Gavilan:but for curiosity sake, if you were to interpret and write this code, would you do it the way I'm proposing or is there some other interpretation or approach I should consider?