Topic for #ruby is now Ruby programming language || ruby-lang.org || RUBY SUMMER OF CODE! rubysoc.org/ || Paste >3 lines of text in http://pastie.org || Para a nossa audiencia em portugues http://ruby-br.org/
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<linduxed>
when trying to do "rvm install 1.9.1" it fails with the last relevant line in the log being ossl.c:118:1: error: unknown type name 'STACK'
<linduxed>
i've got the openssl package installed on my system
<linduxed>
/usr/include/openssl/stack.h is present
<vajrapani666>
I'm trying to create an AMQP-based messaging relay using event-machine , and web-sockets.. I've found a way to run both the AMQP handler and the web socket handler using event machine, but i have had a harder time finding a Non-Blocking http server library that shows how it can be used within EM.run … Instead i see a lot of things regarding non-blocking rack middleware (e.g. goliath?) .. i need to find a framework to help serv
<vajrapani666>
pages from an EM.run loop, or I need to find out how to run an EM.run loop within a rack app.. any hints?
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<canton7>
vajrapani666, iirc, thin (and rainbows?) run on top of eventmachine, so you might have some luck there
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<linduxed>
ok, different question
<linduxed>
when in a ruby/rails repo, is there some way to know what ruby version it was built with, so that i can set that properly with rvm?
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<i8degrees>
also perhaps RAILS_VERSION is more so along the lines ..
<i8degrees>
s/RAILS/RUBY :)
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<[[thufir]]>
http://pastebin.mozilla.org/1459268 is returning all the div elements, which is good. However, how do separate out a particular div?
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<canton7>
[[thufir]], #find maybe?
<[[thufir]]>
div[@class="sectionHeaderText"] I think...?
<canton7>
also, minor points, but lines 21-32 can be replaced by a statement modifier: "emails << email unless email.empty?"
<canton7>
I haven't used nokigiri, so I'm afraid I don't know what format it produces stuff in
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<[[thufir]]>
oh, thanks for the suggestion on emails line 21
<canton7>
I make random style comments about everyone's pastes -- it's nothing personal :)
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<[[thufir]]>
lol
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<atmosx>
hi
<atmosx>
what is the fastest/easiest way to convert this into a simple array of words -> [["asteris"], ["atmat"], ["dens"]] ?
<canton7>
atmosx, words.flatten
<atmosx>
oh
<atmosx>
i never knew of this on
<atmosx>
e
<canton7>
my attitude to ruby methods has become "there's probably a method to do this... open the relevant man page" :P I was going to go with words.map{ |w| w[0] }, but then I spotted that one
<atmosx>
oh my oh my, that's magical
<atmosx>
I was doing some words.each {|x| …} experiments hehe but that's magic :-p thanks
<canton7>
heh, no worries
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<atmosx>
I even took a look on x = Array.new ; puts x.methods; on irb
<canton7>
yeah, that's always handy
<atmosx>
but didn't help hehe I just review the ones I knew didn't pay attention to flatten
<atmosx>
:D
<canton7>
personally, my steps are "google for 'Ruby <classname>', look at left-hand menu bar of the first result. In this instance, "Ruby Array" gave me the array doc page (http://ruby-doc.org/core-1.9.3/Array.html)
<Boohbah>
i like Array.sample :)
<canton7>
that's pretty cool
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<canton7>
Enumerable#partition was extremely useful the other day
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<swarley>
So I know there is "String".next
<swarley>
but how would i go about getting the opposite of next?
<[[thufir]]>
for scraping html, does it make sense to use jtidy or similar to make it xml first? does it matter?
<swarley>
Hm, that seems like something that would naturally be included in the stdlib if next was a part of it
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<canton7>
it appears from the command at the top, though, that it's not possible to write an implementation that has expected behaviour for all cases, which might well be why it wasn't included
<canton7>
*comment at the top
<swarley>
Oh, indeed
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<shevy>
you can see @var is available in other methods too
<shevy>
var however is not
<newbold>
ahhhh
<newbold>
I gotcha
<shevy>
20
<shevy>
test.rb:10:in `test': undefined local variable or method `var' for #<Test:0xb768b980 @var=20> (NameError)
<shevy>
from test.rb:16
<newbold>
a method is a function within a class, right?
<shevy>
well yeah
<shevy>
more or less
<newbold>
not only am I just now learning Ruby, but I'm learning OOP concepts too :P
<shevy>
its tied to an object
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<josefig>
what would be the correct form to do this: sudo env ARCHFLAGS="-arch x86_64" gem install mysql2 -- --with-mysql-config=/Applications/MAMP/Library/bin/mysql_config ??
<shevy>
there are no real functions in Ruby as far as I know, it is always a method tied to an object
<shevy>
if you start irb, and define methods there, it is tied to class Object
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<Muz>
02:04 < shevy> one @ just denotes an instance variable. you can think of it as a global available that is however only available within a given class # Er, that's not correct at all.
<Asher>
cool xpath will work, as i said
<Muz>
@ is a variable which is visible to a single instance of a class, across methods.
<newbold>
where do you put CSS files referenced by erb templates?
<Muz>
@@ would be a variable which is shared across all instances of a class, across methods.
<newbold>
in views or public?
<shevy>
what was the wrong part Muz ;)
<newbold>
I guess it'd be public, if the UA has to access it
<Muz>
shevy: claiming it's 'global' is misleading, given the distinction between @var, and @@var.
<Muz>
And subsequently $var, which is truly variable.
<Muz>
Err, global.
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<newbold>
is there any obvious way to optimize this, or does it look OK at this point? http://pastie.org/3234500
<shevy>
newbold does not look that bad
<newbold>
yay!
<shevy>
but since //xml_api_reply/weather/ repeats itself
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<jsonperl>
c extensions?
<jsonperl>
anyone?
<Muz>
You've asked if anyone has "some chops", I have no idea what that means. Perhaps if you tried explaining your problem instead of prefacing your actual question with a needless one, you'd get some help.
<jsonperl>
fair enough
<jsonperl>
so i'm moving bits of a class down into c, since i'm doing some fairly heavy lifting
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<jsonperl>
im calling it the "kernel"
<jsonperl>
and i'd like to have a kernel per ruby class...
<jsonperl>
i'm unclear how to maintain state for this kernel
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<jsonperl>
using something like: int chunk_count; and then setting that, it appears that it's overwritten when I instantiate a new one
<jsonperl>
i can use rb_ivar_get and rb_ivar_get if i HAVE to, but ruby doesn't need access to this data... any idea what best practices are for "instance variables" in a c extension
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<jaysern>
but i thought collect actually modifies the array
<newbold>
oh, maybe it does
<newbold>
you probably know more than me :P
<jaysern>
"each" doesn't but "collect" is supposed to
<jaysern>
naw, i literally jsut started this afternoon
<newbold>
jaysern: for the fun of it, try arr.collect{|x| x.strip!}
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<newbold>
just to see what happens (if anything)
<jaysern>
hey that worked!
<newbold>
yay!
<jaysern>
what's with the ! ?
<havenn>
bang
<rippa>
though
<havenn>
arr.map &:strip!
<rippa>
collect does not modify original array
<newbold>
I think the ! says "do this, yo."
<rippa>
collect! does
<havenn>
arr.map! &:strip!
<newbold>
like, modify the original stuff
<rippa>
arr.each {|x| x.strip!}
<newbold>
isn't ! ruby's way of saying "warning! you're making changes to your object!"
<sgronblo>
Am I just not looking carefully enough or does 1.8.7's CSV not have a way to write to CSV?
<rippa>
would work also
<rippa>
you don't even need map in that case
<rippa>
map creates new array
<rippa>
map! modifies existing
<jaysern>
what's the difference between collect and map if adding a ! works in both cases
<newbold>
what does collect do?
<jaysern>
im still confused about its usage
<rippa>
jaysern: it's alias
<rippa>
same method
<matthias_>
no ! means make it and throw an error if it falis
<rippa>
map is just shorter
<rippa>
matthias_: no
<jaysern>
sorry
<jaysern>
i mean difference between collect and each
<rippa>
! means this method can have consequences
<rippa>
jaysern: map returns array
<rippa>
new
<rippa>
b = a.map {something}
<rippa>
you have a and new array b
<jaysern>
right
<newbold>
collect just looks weird
<newbold>
I don't think you want to use it :P
<Boohbah>
! means that is will modify an object passed to it instead of instantiating a new one
<matthias_>
hmm ok i heard diffrently - but maybe you are right
<newbold>
jaysern: "each" literally means "each element of the array"
<newbold>
so what rippa said: arr.each {|x| x.strip!}
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<newbold>
that's the easiest way of doing what you're trying to do
<jaysern>
k thanks
<matthias_>
No boohbah, thats not general enough
<matthias_>
what if there are no arguments
<newbold>
jaysern: arr.each {|x| x.strip!} ... "for each thing in the array represented by x, get rid of the newlines and crap associated with x and store the new value of x in place of the old one within the array"
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<newbold>
hmm that gives me an idea
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<newbold>
there should be a thing where you can paste a line of Ruby code and get a semi-human readable explanation like that
<newbold>
ah nevermind, I guess I should just learn what the code means :P
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<bookpage>
oh god newbold: well it looks like it was defaulting to UTF-8 anyway... I didn't know what it should've been since i piped it from a mysql query... turns out if i use ISO-8859-1 then it works without error :) thanks!
<newbold>
bookpage: crazy!
<rippa>
newbold: wrong
<newbold>
bookpage: you'd think a \n would be a \n anywhere and the encoding of the content wouldn't matter
<newbold>
rippa: aww :(
<rippa>
each does not store anything
<newbold>
rippa: be gentle, I'm a total noob
<rippa>
strip! modifies original string
<rippa>
array is not changed
<newbold>
ohh
<rippa>
strings inside are
<newbold>
rippa: how would you change the array then?
<rippa>
map! stores new value
<newbold>
gotcha
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<newbold>
wait, in the same array or in a new one?
<rippa>
in same
<newbold>
ah ok.
<rippa>
map! modifies original, map creates new
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<newbold>
rippa: is there a way when doing .each { |x| ... } to get the index position of x?
<newbold>
or is that info not associated with x?
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<tsd_usa>
you can use each_with_index
<newbold>
tsd_usa: oh, badass
<newbold>
love it
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<newbold>
stuff that ends in ? will return a boolean
<ryanf>
by convention
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<ryanf>
you are free to make methods with names ending in ? that don't return booleans, and the language won't stop you
<jaysern>
interesting.
<newbold>
so whatever.nil? could return true or false; which is handier than doing if whatever == nil
<ryanf>
anyway newbold to answer your question
<jaysern>
so what's .nil and .nil?
<ryanf>
think of those strings as rocks.
<ryanf>
the array is like uh
<ryanf>
something that has strings attached to it which are attached to the rocks
<ryanf>
if you did arr.map! { |s| s.strip }, you aren't changing the rocks, but you're removing the strings from the existing rocks and attaching them to new ones
<ryanf>
if you do arr.each { |s| s.strip! }, you are actually like, I don't know, putting some paint or something on the existing rocks
<ryanf>
in both cases, looking at the array afterwards will appear the same
<newbold>
ryanf: oh, wow.
<ryanf>
but in one case you changed the strings themselves, and in the other you just changed the array to point to some new strings
<newbold>
jeez.
<ryanf>
does that make any sense? I know it's a terrible analogy
<newbold>
jaysern: I don't think .nil is a thing
<ryanf>
yeah there is no .nil
<newbold>
ryanf: no, it does make sense
<newbold>
ryanf: I'm just a total OOP noob :/
<newbold>
so these concepts don't come easily to me, heh
<newbold>
ryanf: I guess my question now is... is there any technical way to tell the difference between an array that's had it's strings painted over vs. one that had them changed in place?
<newbold>
or, in other words, does this technical distinction ever have any serious meaning in any contexts?
<ryanf>
well, there's an .object_id method on every object, and that will change if you make new objects instead of mutating them in place
<ryanf>
but more importantly
<newbold>
jaysern: nil itself is a null value, .nil? is a method that returns boolean true or false if the value is nil
<ryanf>
you could have other references to the same objects somewhere else
<newbold>
ryanf: ahhhh
<newbold>
now I see how you could really screw yourself
<ryanf>
yeah
<newbold>
if you thought you made changes to stuff, and later on find that it didn't change
<newbold>
at least the way you thought it did
<jaysern>
i actually didn't get the rock and strings analogy :x
<ryanf>
yeah although I think what's more dangerous in practice is mutating stuff without thinking about other references to it
<ryanf>
like for example, if you have a method that takes a string as an argument and you call gsub! on that string
<RubyPanther>
it made no sense, but he stuck with it until he got to references at least
<ryanf>
that will be reflected in the context where you called the method
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<ryanf>
in retrospect it was a bad idea to use "strings" to mean references when we were talking about Strings
<ryanf>
but, you know, you win some, etc
<newbold>
woah, String != string?
<newbold>
what's a String?
<ryanf>
just a string, like, you know, some text
<ryanf>
newbold: I just mean vs the string connecting the array to the rocks
<newbold>
ohhh ok heh
<RubyPanther>
In Ruby, everything is a reference. Unless it is a Fixnum. Or a couple other things.
<banister`sleep>
shevy: btw i unbanned u from #pry about 5 mins after i banned u ;)
<banister`sleep>
i wasn't serious
<banister`sleep>
shevy: feel free to rejoin
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<newbold>
hmmm
<newbold>
so I've just run into a situation where I need to store some data, I guess in an array... or a hash? not sure what a hash is yet
<newbold>
but it'll be two "columns", like this: "Light rain","and raining lightly"
<newbold>
what's the best approach?
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<dhs227>
newbold: a hash is like a chain of unique keys. The difference between hash and set is, hash must have a unique id
<newbold>
ah
<dhs227>
the benefit is, hash tend to have more fash access speed for searching/replace
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<newbold>
I'm going to store the data in a text file, and load it into... something
<newbold>
I guess that's the part I'm having trouble with
<newbold>
in PHP i'd do it as a simple array with a key value pair
<dhs227>
if you wanna manage objects in hash, just make sure each and every of these objects have unique key value.
<newbold>
they will
<newbold>
so are hashes the answer?
<dhs227>
yup
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<newbold>
I just need a way to easily replace an instance of STRING with some_other_string, where the text file will have a line like STRING,some_other_string
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<wallerdev>
bah ruby is so slow!
<wallerdev>
haha
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<josefig>
wallerdev, uh?
<wallerdev>
you heard me :)
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<josefig>
wallerdev, nice to know your point of view.
<wallerdev>
for sure
<wallerdev>
my enumerable map is taking over a second
<wallerdev>
and it is making me sad
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<josefig>
wallerdev, but it's not always the programming language the responsable; implementation, hardware, other resources, etc.
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<josefig>
It happened to me.
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<wallerdev>
haha don't get me wrong, i love ruby and I'm looking at how i can optimize the data
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<josefig>
wallerdev, right, but that's why I'm telling you, maybe something related with: implementation, hardware or other resources, you'd have to check those things.
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<josefig>
it happened to me with some data reader, was because of the implementation.
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<wallerdev>
well I'm literally timing an enumerable#map inside of a map that reads some ruby attributes and creates arrays
<wallerdev>
its just a lot of data
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<josefig>
wallerdev, right.. hum, that's a good challenge.. :)
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<wallerdev>
i suppose i could cache all the data
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<idarkside>
is this possible
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<josefig>
idarkside, I don't understand at all your question, could you be more explicit please? and is in PHP ? or what?
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<wallerdev>
yeah i think he's in the wrong channel
<wallerdev>
thats not valid ruby
<josefig>
yup, idarkside I invite you to type: /join ##php and expain over there.
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<idarkside>
josefig im trying to call the script in a ruby process
<josefig>
idarkside, so, paste bin the snippet.
<idarkside>
upon startup i would like the process to call license.php and check for active or inactive if the status reads active then i would like the script to put "License Valid" if its reads inactive i would like the process to die
<idarkside>
:)
<wallerdev>
have you written any ruby to tackle the problem yet?
<josefig>
idarkside, that's a var_dump in PHP, I suggest you to do a simple call with HTTP Headers like when you call a REST call or something like that, because I don't really understand your question.
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<idarkside>
ok lemme try this
<idarkside>
when you view the file on the web it says active or inactive
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ModsBot [ModsBot!~ANON@75-171-97-44.phnx.qwest.net] has joined #ruby
<ModsBot>
Hello Everyone
<Modification>
now we wait...
<Modification>
it took 252 seconds last time..
<Modification>
k just got pinged..
<Modification>
waiting for teh pong.. *crosses fingers*
<Modification>
seems to be working... :)
<Modification>
k those two problems.. solved..
<Modification>
now how do I program it to respond to stuff?
<Modification>
DAMN!!
<Modification>
piece of crap..
<Modification>
-_-
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ModsBot [ModsBot!~ANON@75-171-97-44.phnx.qwest.net] has joined #ruby
<ModsBot>
Hello Everyone
<Modification>
I swear this thing is frustrating.. like it said.. requires patience...
<Modification>
:D
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<Modification>
i gtg soon...
<Modification>
-_-
<Modification>
how many here took the ruby in twenty coursE?
<Modification>
:D
<Modification>
would a bot made with ruby be considered a rubot?
<Boohbah>
please don't test your bot in this channel
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<Modification>
I don't know where to test it at...
<ca_bud>
what do I change to allow passenger to use ruby 1.9.3 vs the current version 1.9.2
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<ca_bud>
I have RVM installed and have set the .rvmrc files in the webapp, but it still does not change what passenger uses
<Modification>
anyone know which channel use to test bots?
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<rippa>
any empty channel
<Modification>
I go to #flood
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<[[thufir]]>
bad uri from: url = URI.parse 'https://#{user}:#{pword}@mail.google.com/' so how to concatenate those together so that the pword and user are passed(?) into the url?
<[[thufir]]>
ah. use << ?
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<clockwize>
why are you incrementing value at all?
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<clockwize>
just do if user.role.title == "Retiree" ; flash[:error] = "Cannot send invitation to a Retiree" ; return redirect_to invite_community_path(@community) ; end
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<_marvin>
hi
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<mylifeisfine>
hai friends... :)
<mylifeisfine>
need a small help... is it possible to simplify this line of conditional comparison further ?
<mylifeisfine>
if current_user.role.title.strip == "Retired" && @user.role.title.strip != "Retired"
<mylifeisfine>
Anyone any suggestions ??
<RubyPanther>
mylifeisfine: just assign it, t = current_user.role.title.strip ; if t == ... && t = ...
<banister`sleep>
RubyPanther: talk to me
<mylifeisfine>
RubyPanther: ok but still thats again an assignment... i just do this comparison at one place.. so it will be 3 lines of code instad of 1 line.. is it possible to simplify this line again ?
<mylifeisfine>
banister`sleep: any ideas ?
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<shevy>
mylifeisfine it is a little bit odd that you have to work on a string and apply .strip on it on your own
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<mylifeisfine>
shevy: thats because it does a comparison with the bd value and when a user enters a value.. u never know if it takes a whitespace or two with it into the db..
<RubyPanther>
mylifeisfine: you're fighting the simplification but having a temp var is always going to be the simplest, for both the human and the computer
<mylifeisfine>
shevy: sorry db not bd
<shevy>
hmm
<RubyPanther>
if you want some golfed thing it will be _more_ complex
<shevy>
I dont really understand it, but for me it seems easier to use a proper setter that strips all whitespace anyway.
<mylifeisfine>
shevy: so could you just give me an example i mean how exactly can i do that?
<banister`sleep>
mylifeisfine: i'll help you if you can get RubyPanther to talk to me
<shevy>
do what
<banister`sleep>
shevy: you can rejoin #pry btw, i only banned u for like 5 mins, and i wasnt serious
<banister`sleep>
:)
<shevy>
I am still a sad man, but I shall rejoin one day
<mylifeisfine>
shevy: oh k u saying that u wud have a setter in the model for stripping the data at the time of accepting the data ryt ? :) thats a good idea !1
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<shevy>
mylifeisfine: you could try to reshuffle the logic if you dont like your above code
<banister`sleep>
shevy: why are you sad
<shevy>
mylifeisfine: well, if you have to call .strip everywhere, I wonder, because it seems unnecessary to me, unless you do indeed need to care about whitespace (but I still did not understand why you really need the whitespace)
<mylifeisfine>
banister`sleep: why do u want RubyPanther to talk to you? ;) You can always talk to me and catch up with me https://twitter.com/#!/mithun_sasi
<shevy>
I am also not sure about the difference between .... current_user and @user
<ex0a>
i'm trying to fix a function in waveform.rb ( http://pastie.org/3236292 ) that is due to there only being one channel of audio but i'm not experienced in ruby and was hoping one of you could give me an idea on how to recover after it fails to add the float into an array (i assume that's what the error msg is saying?)
<shevy>
what I usually do, when I need some sanitized @variable, is to just define one setter, and do the sanitization thing within that setter on my own
<mylifeisfine>
shevy: i dnt need a whitespace :) and thats why i do a strip while comparing the db value :)
<shevy>
and only use that setter when @variable is modified
<shevy>
yeah but that is odd to me :)
<shevy>
when you have to call .strip every time
<mylifeisfine>
shevy: by the way what does the sanitizer gem do? the same thing?
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<shevy>
no idea what it does. there are way too many gems out there
<mylifeisfine>
shevy: ya but the name suggests that it does something similar to that :0
<mylifeisfine>
:)
<shevy>
ex0a, something tries to call a [] method on Float
<mylifeisfine>
shevy: curent-user is the one who is accessing and @user is the one whose he is accessing like for example accessing profile.. :)
<shevy>
peak = frame[channel].abs if frame[channel].abs > peak <--- I guess frame is a Float
<shevy>
sounds confusing mylifeisfine but if it makes sense to you, I guess it's fine
<shevy>
my golden rule of coding is the zombie rule
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<shevy>
code must be understandable to zombies, else the code is wrong
<mylifeisfine>
shevy: its like if the role of current user is retiree then he can only access other retirees items and profiles alone :) so I am checking that :)
<shevy>
hmmm
<ex0a>
shevy: okay doing some reading ty
<shevy>
if foo == "Retired" && foo != "Retired"
<RubyPanther>
mylifeisfine: that code should never exist like that, it should be in one of the models
<shevy>
dont think you can get much shorter than that
<shevy>
but that is all kinda ugly to zombies
<banister`sleep>
mylifeisfine: you made a grammatical error in your last tweet
<banister`sleep>
mylifeisfine: that alone is enough to turn me strongly against you
<RubyPanther>
it would be like if current_user.can_haz(@user,"Retired")
<mylifeisfine>
RubyPanther: hmm... but the thing is iam playing around with a project thats already been coded and deployed so i got make my changes within the limited flexibility
<shevy>
well using one method seems better than checking for two values
<RubyPanther>
mylifeisfine: you can always add methods to classes
<RubyPanther>
the worst case is having to name your stuff poorly so you don't collide
<mylifeisfine>
RubyPanther: the way u tell me i must have a method in my user model that returns the users roles and then compare it in the controller than doing it explicity in the controller!! Am i ryt?
<RubyPanther>
mylifeisfine: right, the controller should not be deciding what it means for access to be allowed, it should only be setting up the state and asking the models what is allowed
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<RubyPanther>
allowed is business logic, goes in model
<mylifeisfine>
so in User.. i will do something like def user_role user.role.title end :) As simple as that
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<mylifeisfine>
RubyPanther: so in User.. i will do something like def user_role user.role.title end :) As simple as that
<mylifeisfine>
RubyPanther: Are you a RailsPanther ? :)
<RubyPanther>
mylifeisfine: why do you keep spamming a twitter link?
<shevy>
lol
<shevy>
yeah change your nick panther!!!
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<mylifeisfine>
RubyPanther: am sorry when i pressed CTRL+V i got pasted accidently
<RubyPanther>
mylifeisfine: no, thankfully I rarely have to use rails anymore
<shevy>
funny things happen randomly
<mylifeisfine>
shevy: you too to RubyShevy :)
<shevy>
hmm I like short nicks
<RubyPanther>
now I write point of sale systems, so you can just call me POSPanther
<mylifeisfine>
RubyPanther: : Its just been half an year since i started working on rails and the only thing i love abt RoR is ruby and not a stuff from rails.. i hate it ;(
<shevy>
take tommylommykins here ... noone can remember this dude
<shevy>
I found ruby before rails, luckily
<mylifeisfine>
i wanna move on... miss the good old days when i use to develop using J2EE :( sadly
<mylifeisfine>
shevy: you work on ruby ?
<shevy>
cool what was J2EE like?
<shevy>
well I use ruby for every programming-related task so far
<RubyPanther>
mylifeisfine: IMO there are only two reasons to use rails, 1) it is Ruby 2) it is a known name and considered business friendly
<mylifeisfine>
shevy: Its so much fun... u gt to do each and everything on ur own even the db queries unkline rails in which its spoon feeding u dnt really have any challnge as such..
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<mylifeisfine>
RubyPanther: I have made up my mind to either switch to android programming or go for higher studies.. may be an MS !! :0
<RubyPanther>
I do enjoy using AR outside Rails, though
<mylifeisfine>
RubyPanther: AR ?
<RubyPanther>
ActiveRecord
<shevy>
mylifeisfine: right now I am looking at this explosion of warnings http://pastie.org/3236356 and will probably rewrite this until all those warnings are gone, for some reason I seem to require the same files at least twice
<mylifeisfine>
RubyPanther: hmmm...
<mylifeisfine>
shevy: what is this abt /
<RubyPanther>
if I get stuck interfacing with SQL Server I can just use odbc+AR and pow! from turd sandwich to roses, that quick
<mylifeisfine>
shevy: are you oveerriding the method somewhere ? :-/
<mylifeisfine>
RubyPanther: thats being lazy and not staying awake until u get things right the hard way :P
<shevy>
mylifeisfine no idea, I started this like 2 years ago and no longer know what's going on really
<RubyPanther>
exactly, the three virtues of a programmer, laziness, impatience, hubris.
<mylifeisfine>
RubyPanther: and you being proud abt it ? :D
<mylifeisfine>
RubyPanther: impatience is a good virtue though
<RubyPanther>
That's the hubris.
<mylifeisfine>
RubyPanther: its like wanting things done anyhow and as quickly as possible but it sometimes can lead to error since u rnt patient enough to test your codes from all quarters
<mylifeisfine>
shevy: that sounds like an old tale... coming back to an old code after 2 loioong years :)
<RubyPanther>
mylifeisfine: if you're truly lazy, you take enough precautions to prevent that sort of problem
<mylifeisfine>
RubyPanther: that sounds too ironical :)
<shevy>
mylifeisfine well, at least this is all in ruby
<shevy>
I couldn't go back to PHP :(
<RubyPanther>
like in the original Pragmatic Programmer book, where they teach you not to build out features you don't need, but to design your app assuming that you'll need to extend it and build out features later. Preemptive laziness.
<mylifeisfine>
shevy: what in this world is stopping you.. go for php and get yourself hired by http://facebook.com :)
<shevy>
naaah
<shevy>
I couldn't work for things I hate (and don't use and never will use)
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<mylifeisfine>
shevy: fair enough :)
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<RubyPanther>
Those are the best work projects, the worst are ones partially related to a hobby or personal interest/need so then when you try to take a break from work, your hobby brings it right back in your face
<shevy>
hmm
<shevy>
I found it best when a project can keep me curious over many months
<shevy>
else I abandon it at a later point again
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<shevy>
hmmm
<shevy>
where does .pretty_inspect come from...
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<[[thufir]]>
do you have to use sockets for https?
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<mylifeisfine>
Hai friends... I am new to ruby had a small doubt what is difference between self.role.title.strip! and self.role.title.strip
<mylifeisfine>
RubyPanther: help me boss :)
<mylifeisfine>
i mean strip with ! and without ! ???
<RubyPanther>
mylifeisfine: the one with the ! modifies the receiver, the other one makes a copy and operates on that.
<RubyPanther>
good timing, I was watching videos of feral children
<mylifeisfine>
so if i do self.role.title.strip! it will modify the data ryt so i shud be doing it without ! in the controller to compare values without whitespaces?
<mylifeisfine>
RubyPanther: ^
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<RubyPanther>
mylifeisfine: well, you do have to know if you want to modify the receiver or not, or you have bigger problems
<mylifeisfine>
RubyPanther: i just wana compare values without whitespaces so.. i shudnt be using !
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<mylifeisfine>
is there a cleaner way of comparing two strings than to do variable != "Value"
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<mylifeisfine>
is there a cleaner way of comparing two strings than to do variable != "Value"
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<shevy>
mylifeisfine perhaps do_something unless x == y
<rippa>
what's not clean about that?
<mylifeisfine>
rippa: its clean but i wasnt sure if this is the ryt way to do things in an enterprise web app view page ?? :)
<mylifeisfine>
rippa: if there is a better conventional way of doing it :)
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<JonnieCache>
yeah you could say its not good to do that in a view as its not clear why youre doing the comparison
<JonnieCache>
itd be perhaps better to have an appropriately named helper make that comparison and return the result so the view will be clearer
<manhunter>
is there any offtopic channel for ruby?
<mylifeisfine>
JonnieCache: i wanna make some links invisible for certain users :)
<RubyPanther>
often you only want single methods ending in ? in conditionals unless you're in an instance method (in rails I would restrict that further to model methods)
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<mylifeisfine>
RubyPanther: so how can I write this as a method in my model if user.role.title.strip == "Retired"
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<`brendan>
morning
<manhunter>
is there any offtopic channel for ruby?
<shevy>
manhunter sure. every non-ruby channel.
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<shevy>
mylifeisfine, seems you don't get rid of .strip ;)
<mylifeisfine>
def (text)? self.role.title.strip.eql? "Retiree" end
<shevy>
what is the ()
<RubyPanther>
def retired? ; !!(self.role.title =~ /\A\s*retired\s*\Z/i) end
<shevy>
you do know that
<shevy>
def foo(arg) is the usual convention right? :P
<mylifeisfine>
shevy: def (text)? self.role.title.strip.eql? "Retiree" end
<shevy>
!!!
<shevy>
what are you doing man!
<mylifeisfine>
RubyPanther: if i wanna pass an argument? thats why i have (parameter)
<mylifeisfine>
def (text)? self.role.title.strip.eql? "text" end
<RubyPanther>
def can_haz? stuffs; !!(self.role.title =~ /\A\s*#{stuffs}\s*\Z/i) end
<shevy>
!!!!!!!!!!!!!!!!
<mylifeisfine>
RubyPanther: ^
<shevy>
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
<mylifeisfine>
shevy: what happened? does the method make sense now ?
<shevy>
this is not valid ruby man
<RubyPanther>
the good news, at least it isn't valid python, either
<mylifeisfine>
shevy: then how will the method be ? :( I am a learner forgiv me
<shevy>
mylifeisfine a method needs a name, right?
<shevy>
and the name comes first after "def" ok?
<RubyPanther>
mylifeisfine: the ? is just part of the name, you can also use ! at the end :)
<shevy>
and after you gave it a name, you can define what arguments it takes
<mylifeisfine>
shevy: sorry missed to add it : here you go def role_name(text)? self.role.title.strip.eql? "text" end
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<mylifeisfine>
RubyPanther: please define the correct method :( am tired :)
<shevy>
that is a bit better mylifeisfine
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<shevy>
but
<shevy>
it is still not correct
<mylifeisfine>
shevy: is that correct the king of ruby shevy ?? :)
<mylifeisfine>
shevy: why so ?
<shevy>
you need to start reading what people type man
<RubyPanther>
mylifeisfine: take off the quotes and you're there, assuming whitespace
<shevy>
<RubyPanther> mylifeisfine: the ? is just part of the name, you can also use ! at the end :)
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<shevy>
the "?" is part of the name
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<shevy>
def role_name(text)? must be def role_name?(text)
<mylifeisfine>
shevy: its a boolean method returning true or false so I added ? is it wrong/
<mylifeisfine>
shevy: ok got it :)
<shevy>
look man
<shevy>
ruby does not care if it is a boolean method or not
<shevy>
it is just part of the method name
<shevy>
it is a convention by people that a method with a "?" should return a boolean value
<shevy>
but ruby itself cares 0 about this convention
<mylifeisfine>
shevy: then why do ppl use ? after method name.. ??
<shevy>
ask them
<mylifeisfine>
shevy: ok got it
<shevy>
perhaps they like to think with that scheme
<shevy>
when you look at other people's code, you could assume that it returns a bool
<shevy>
I myself use it more in the context of a query
<canton7>
it's just convention -- you can tell, just by looking at the method name, that it's going to return a boolean
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<shevy>
def colour?
<shevy>
return @colour
<shevy>
end
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<mylifeisfine>
shevy: there was one more mistake in my function that u missed to catch hold of it shud have been self.role.title.strip.eql? text rather than self.role.title.strip.eql? "text"
<shevy>
yeah man
<shevy>
it is a pyramid build on top of straw
<shevy>
:)
<mylifeisfine>
shevy: :) thanks for yor help now my method is lkike this finally
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<mylifeisfine>
def role_name?(role) self.role.title.strip.eql?role end
<shevy>
see? you get better quickly
<mylifeisfine>
so i can do if current_user?("Retired")
<mylifeisfine>
shevy: thanks for your help ^ thats ryt no ?
<RubyPanther>
class Woah ; define_method :'!derp??' do |xxx|; "uhmm.... %s" % xxx end end ; Woah.new.send '!derp??', !!?!??!:??=> "uhmm.... !"
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<RubyPanther>
brought to you by the letter wtf
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<atmosx>
I tried double \t in puts but looks equally bad as single <tab> \t
<stylewalka>
Hi, I'am new to ruby; I would like to parse a file, which looks like: "KEY1 {attr1 = value1 \n KEY2 {attr2 = value2}}" Thanks for any pointers or suggestions
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<shevy>
atmosx you can use sprintf perhaps
<banister_>
stylewalka: ruby doesnt have pointers
<atmosx>
sprintf ?
<atmosx>
hmmm
<shevy>
atmosx, '%3s' % '1' will become ' 1'
<atmosx>
using the same syntax?
<shevy>
atmosx:
<shevy>
x = 'abc'
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<shevy>
'%15s' % x # => " abc"
<shevy>
you see how it works?
<shevy>
I would re-assemble the "Table: #{x}\t\tEntries: #{count}\tLast Tweet: #{date}"
<shevy>
but you can embed the % into it too
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<shevy>
I just hate to see many #{} in strings :P
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<atmosx>
shevy: yeah got it
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<atmosx>
shevy: but isn't that the 'standard' way of doing it? printf and variations reminds me of 'C'
<atmosx>
not that I'm good with it, but I can write simple things
<shevy>
hmm dunno, there are more ways
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<shevy>
.align or .pad or .ljust or something like that
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<shevy>
hah
<shevy>
in PHP ...
<shevy>
$anzahl = 5; $ort = 'Baum'; $format = 'Es sind %d Affen auf dem %s'; printf($format, $anzahl, $ort);
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<atmosx>
shevy: excellent thanks :-D
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<shevy>
I think sprintf() is ok
<shevy>
though I myself use mostly % when I have to do formatting
<shevy>
there is some gem that focuses on string formatting too, I think
<atmosx>
well yeah but requiring an extra gem is a kind of pain
<shevy>
true
<shevy>
:)
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<mylifeisfine>
shevy: if user.role_title?(text) similarly to see if "not equal to" i must do if !user.role.title?(text) am I ryt ?? :)
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<glacius0>
Hi guys I am having an issue with some regex, i am so close to getting the result i want but it seems to be escaping me, could you please take a look http://pastie.org/3237135
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<canton7>
rubular.com is handy
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<shevy>
yea
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<stylewalka>
q
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<alexhanh>
what was the super short syntax (without even {}-block) for .map?
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<shevy>
alexhanh hmmm
<shevy>
for .map really?
<shevy>
.map(&:capitalize) perhaps
<alexhanh>
oh that shiet, wow
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<alexhanh>
awww yea, thanks bromingo
<alexhanh>
herp derp
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<cirbri>
Hi there, does anyone know whether Ruby's regexps have a special key for what number of matches it's made so far... erm, like this .gsub(/s/, "\nth replacement")
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<canton7>
cirbri, use the block syntax of gsub, maybe?
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<[[thufir]]>
mailIds = imap.search(['ALL']) #how do you know what options are for 'ALL'? what else is there?
<[[thufir]]>
'LESS_THAN_X'?
<[[thufir]]>
first 20?
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<maasha>
hey. is there a smart way to detect the number of available cores to use for max threading of an app?
<llaskin>
given that actions is an Array with 3 elements all of type WrappedWebElement why, when I run actions.each{|action|} does each action element become an array whcih has element[0] = Fixnum(0) and element[1] = WrappedWebElement?
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<cirbri>
canton7: Yeah, I've done something along those lines -- thanks.
<canton7>
llaskin, I've no idea what WrappedWebElements are, but .each doesn't modify the array it was called on, so no, nothing will change
<llaskin>
canton7: so how can I get each element of the array by itself?
<llaskin>
short of doing a for loop or some such?
<Sailias>
llaskin, gist your code plus the output
<robert_>
is there a ruby library that can read theora and vorbis which lets me stream it out over http?
<JonnieCache>
you dont need to read the vorbis format to stream it over htto
<JonnieCache>
http*
<JonnieCache>
you just push the data down the wire
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<llaskin>
slightly modified but basically the gist of it
<shevy>
right JonnieCache!!!
<robert_>
yeah, but I'm streaming multiple videos as one long video.
<robert_>
I want to be able to avoid re-sending the headers each and every time
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<JonnieCache>
perhaps it would be easier to just chop off the headers with some simple code, rather than firing up a whole decoder suite
<canton7>
llaskin, if nothing else, assume the first two if's are false, and the last one is true. Then actions is [nil, nil, something], which probably isn't what you want
<JonnieCache>
but im not a video streaming expert
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<canton7>
that said, each action is itself an array
<Sailias>
llaskin, can you add a1.inspect to that?
<Sailias>
llaskin, sorry, add a1, a2, a3 and inspect each
<Sailias>
one of them is an array
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<llaskin>
inside the if statements?
<Sailias>
at the top, in a new file or something
<llaskin>
ok put it right above the if
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<llaskin>
a1.inspect prints out nothing
<llaskin>
but when I put a watch on it, in the IDE I am using, it definitely contains a wrapped wab element....
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<Sailias>
llaskin, either a1, a2 or a3 is adding an array inside "actions". You can call actions.flatten.each if you wanted to add multiple elements into it or you can find out why you are adding an array and not expecting it
<canton7>
It's probably best, in the long run, to figure out what's actually going on
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<llaskin>
ok
<Sailias>
canton7, i always suggest a proper fix as an "option." But to me it's not an option, you should always understand what's happening :)
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<moshef>
hi guys. i have array of hashes and each hash has 2 keys
<moshef>
i have another array i want to merge with the first one. but if certain value (id of something) is already in the first one - just add to the hash, don't create another hash
<moshef>
how do i do that?
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<moshef>
guess i could also just add everything and then combine it somehow?
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<canton7>
moshef, don't quite get the question. Do all the hashes have the same keys?
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<moshef>
canton7: they do
<moshef>
but some of them share the same value
<canton7>
moshef, give me an example of two hashes? {:id => :something, :key => :val}, and {:id => :something, :key2 => :val2} ?
<moshef>
canton7: just a second
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<luxurymode>
Any obvious reason why puts Dir[File.join(path, '**', "*.{jpg, JPG}")].count is printing thousands less than i know it should? ;)
<luxurymode>
am i doing the recursive thing correctly?
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<heftig>
luxurymode: more than two variations of case?
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<heftig>
files ending in .jpeg or .jpe?
<luxurymode>
heftig, nope apparently in my actual scrip i had spaces between the commas so that was the problem
<luxurymode>
it was trying to find '*. JPG'
<luxurymode>
instead of '*.JPG'
<heftig>
ah, that
<heftig>
yes.
<luxurymode>
hehe thanks though
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<rippa>
luxurymode: and still got some matches?
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<luxurymode>
yeah was just thinking about that
<luxurymode>
it did
<luxurymode>
which is disturbing
<luxurymode>
with spaces, i get 4000 hits
<luxurymode>
without i get 10K+
<heftig>
it still matched *.jpg
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<moshef>
canton7: hi, are you still around?
<canton7>
hey, yeah
<moshef>
first array looks like - [{:id => 12, :key => 'value'}, {:id => 13, :key => 'value2'}]
<moshef>
second array looks like = [{:id => 12, :another_key => 'another_value'}, {:id => 14, :another_key => 'another_value'}]
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<moshef>
what i'd like is to have a final array with something like [{:id => 12, :key => 'value', :another_key => 'another_value'}]
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<luxurymode>
heftig, ah right. so does this mean that if i go without spaces im missing some
<luxurymode>
?
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<moshef>
canton7: hope i was clear :)
<rippa>
moshef: just use Hash#merge
<heftig>
luxurymode: no.
<heftig>
{jpg,JPG} is right
<luxurymode>
k, thats wat i thought
<luxurymode>
thanks heftig
<canton7>
moshef yup that's clear. one min
<moshef>
canton7: awesome, thanks
<luxurymode>
heftig, just found 3800 duplicates :)
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<heftig>
luxurymode: Dir.glob("*/foobar", File::FNM_CASEFOLD) for case-insensitive globbing
<luxurymode>
heftig, ah nice
<luxurymode>
so i can get rid of the jpg,JPG
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<luxurymode>
found that i needed case-insensitive on a mac at least
<heftig>
only windows is case-insensitive by default
<canton7>
oks, so first off, I'd make the first array a hash, of the form {12 => {:key => 'value'}, 13 => {:key => 'value2}}. s = {}; array.each{ |a| s[a.delete(:id)] = a } would work
<canton7>
moshef, ^^
<canton7>
then you can do something like.. ang on, I'll pastebin
<heftig>
using hash.merge
<moshef>
awesome, thanks
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<apeiros_>
mgolisch: you can also use `ruby myscript.rb`
<hashpuppy>
Hanmac: thanks!
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<mgolisch>
iam running it like so ruby.exe somescript someargs
<mgolisch>
and for some reason it tries to execute it using whatever is in the shebang line
<apeiros_>
mgolisch: that should definitively not be the case
<apeiros_>
how do you figure?
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<mgolisch>
apeiros_: hm i call it like that and it says cannot exec foo fatal
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<mgolisch>
it has no rb extension though
<mgolisch>
maybe thats why
<apeiros_>
no, that shouldn't matter
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<Planet_EN>
everytime I do rvm use 1.8.7 I get this: "RVM is not a function, selecting rubies with 'rvm use ...' will not work."
<Planet_EN>
I know I should ask it in #rvm but seems like everyone's dead over there
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<mgolisch>
hm seems like if a shebang exists it tries to run it using that
<mgolisch>
is there some way to turn that off?
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<Planet_EN>
exit
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<mgolisch>
perl seem to do the same
<mgolisch>
why in hell would i want to interpret the shebang if i call the script using ruby..
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<jcromartie>
halp
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<jcromartie>
how do i have codes to make rails app plz email codes
<jcromartie>
OK, but seriously. Is there a good place to read up on conventions for the file/folder structure of a Ruby command-line tool in regards to lib/bin directories, etc.?
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<jcromartie>
I have packaged things like this as a gem before
<jcromartie>
that seems to be easy
<jcromartie>
but this is a great guide
<jcromartie>
now, if I am correct, RubyGems just sets up Ruby's lib path to include all of your installed gems' lib dirs?
<apeiros_>
no, but the effect of what it actually does is similar
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<apeiros_>
it also installs executables, and depending on your setup, they can be used directly
<jcromartie>
ah, well yes it overloads require doesn't it?
<apeiros_>
there's no overloading in ruby. it redefines it.
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<jcromartie>
that's what I mean
<mgolisch>
so could someone think of a way i could run my script without interpreting the shebang?
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<apeiros_>
well, you could remove the shebang
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<mgolisch>
but i need it so it would be used when called from cygwin bash
<mgolisch>
:(
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<jcromartie>
let's say I am developing gems for my company: would it make sense to have each gem include a /lib/my_company/my_gem directory? or is that going to cause confusion?
<michaelgamble>
Hey I'm a first time user of anything in ruby
<michaelgamble>
i think its a ruby on rails project I'm trying to get running, but I'm hitting this wall
<jcromartie>
i.e., did you run "bundle install" yet?
<michaelgamble>
yeah i tried that but when i ran the bundle install it would fail
<michaelgamble>
I'm not exactly sure the error message, let me re-try and see what the message was
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<jaysern>
how does the ruby interpreter know where to look for a module? is there a config file somewhere that specifics this? perhaps in /etc ?
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<freelanceful>
anyone know how to force_ssl for devise sign in pages?
<freelanceful>
can't find anything
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<matthias_>
hey
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<michaelgamble>
ok so just so I'm understanding whats going on, i have a Gemfile, that is what outlines what installs during a "bundle install" command?
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<michaelgamble>
(now I'm running bundle install and i get no error)
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<philcrissman>
michaelgamble: yes; the Gemfile tells bundler what to install and/or update.
<michaelgamble>
it seems to have reference to the rot repository in it.. so I'm not really sure why it would be asking for it
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<michaelgamble>
is it cause its in that "group" block that its not running that line?
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<CodeZombie>
could someone take a look at this for me? I've put my question, and my scopes into a gist, since it's a pretty long question. https://gist.github.com/e77cbc76865e91c40a58
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<elitheeli>
Hi, ignoring all coding styles and best practices, is there a shorter (measured by number of characters) way to drop the first character from a string than "s=s[1..-1]"?
<epochwolf|vps>
code golf is a sin against good design :/
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<apeiros_>
s.shift
<apeiros_>
oh, from a string
<apeiros_>
s[0,1]="" # might be shorter
<apeiros_>
oh, fun, since 1.9, s[0]="" works too
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<elitheeli>
apeiros_: awesome, thanks
<elitheeli>
epochwolf|vps: don't worry, it's not for a real project
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<apeiros_>
is it for a surreal project then?
<apeiros_>
or an imaginary?
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<davidcelis>
absurdist, i hope
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<elitheeli>
Writing the shortest cycle tag system emulator I can. Down to 61 characters, of which 15 are the input. Is there a better way to append a string to a string and then chop off the first character than "s<<t;s[0]=''"?
<luxurymode>
isnt there a way to grab part of a regex, like /some reg(ex)/ and $0 will grab the ex?
<luxurymode>
cant seem to get that to work
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<elitheeli>
luxurymode: if /some reg(ex)/ =~ string ; $1 ; end
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<apeiros_>
luxurymode: string[/reg(ex)/, 1]
<apeiros_>
avoid the $ vars. they're there, but they bite.
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<luxurymode>
elitheeli, thanks
<luxurymode>
apeiros_, how so?
<apeiros_>
luxurymode: uhm… just the way I showed you…? maybe? perhaps? eventually?
<elitheeli>
luxurymode: magically set globar vars are rarely a good design decision
<elitheeli>
global*
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<luxurymode>
apeiros_, oh whoops, wasnt even realizing that it was a global var. yeah i avoid global vars in all languages
<luxurymode>
not very OO
<elitheeli>
apeiros_: next golf question: simultaneously printing a string and seeing if first char is a '1' (it'll be a '0' otherwise)… I have (p s)>'09'.
<Mon_Ouie>
Why not just >'0'?
<Mon_Ouie>
Which in Ruby 1.9 can be written as >?0
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<elitheeli>
Mon_Ouie: because '01'>'0'
<Mon_Ouie>
Oh, nevermind
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<ninor>
hi everyone. how's the ruby contract market where everyone's at?
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<ninor>
im back in ruby after a few years away!
<luxurymode>
where in Dir[File.join(path, '**', "*.{java}")] do i add File::FNM_CASEFOLD?
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<elitheeli>
luxurymode: after the pattern
<luxurymode>
what i thought but wasnt working
<luxurymode>
might be a diff issue though
<elitheeli>
it's a little more clear with #glob
<luxurymode>
trying to figure it out
<elitheeli>
luxurymode: I don't think Dir.[] takes flags, use Dir.glob
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<elitheeli>
also if you give Dir.glob a block, it'll return nil
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<aaroninfidel>
hi there is there a ruby method to test a regexp pattern against a string and have it return 1 if it matched something or 0 if it didn't?
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<Seppman>
good evening, whats the best way to implement calling a function by name, for examle have name of a function in an array, and call the function whichs name is in array[3]?
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<rippa>
aaroninfidel: what's wrong with default behaviour?
<aaroninfidel>
rippa: what do you mean?
<rippa>
string =~ /regexp/
* aaroninfidel
is a total ruby noob
<rippa>
returns nil if not matched
<rippa>
or position if matched
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<Seppman>
aaroninfidel: match? and test for nil
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<apeiros_>
Seppman: =~ is more efficient than .match for simple true/false matching
<rippa>
why though?
<Seppman>
apeiros_: ok, thanks
<aaroninfidel>
Seppman: hmm
<aaroninfidel>
Seppman: if I wrote a JavaScript example could you show me how to get the same result in Ruby?
<rippa>
apeiros_: why is it more efficient?
<apeiros_>
rippa: it doesn't need to build the matchdata obj
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<rippa>
but it still saves that information
<rippa>
in globals
<apeiros_>
no
<Seppman>
aaroninfidel: noe, due i dont know JS. but match and =~ essentially seem to do the same
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<apeiros_>
those are lazy
<rippa>
oh
<rippa>
nice
<rippa>
so wait
<Seppman>
just go with !nil is your beeing 1
<rippa>
it makes a match again?
<rippa>
to get that information
<rippa>
or what
<apeiros_>
just go with: if foo =~ /regex/ then
<apeiros_>
no need to test for nilness
<apeiros_>
rippa: afair it only constructs needed objects
<apeiros_>
e.g. if you don't use $~, it won't create the matchdata object
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<rippa>
it looks ahead?
<apeiros_>
if you don't use $1-9, it won't create the string objects referencing them
<apeiros_>
rippa: no, global variables can actually be C functions
<apeiros_>
check rubys C API
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<rippa>
I just don't get how can interpreter know that $~ won't be used
<apeiros_>
rippa: it doesn't need to know
<apeiros_>
using $~ will invoke a C function
<apeiros_>
that function will construct the matchdata if needed
<rippa>
we, I thing i get it now
<rippa>
it stores information about match, just doesn't build objects
<apeiros_>
right
<apeiros_>
at least it was that way in 1.8
<Seppman>
whats the best way to implement calling a function by name, for examle have name of a function in an array, and call the function whichs name is in array[3]?
<rippa>
send
<rippa>
Kernel#send
<apeiros_>
actually Object#send
<rippa>
oops
<apeiros_>
Kernel has the function-like stuff, Object has the OO stuff (things that rely on self)
<Seppman>
thanks you both
<apeiros_>
not that it mattered much, since docs cheat…
<Seppman>
cause i want to implement some sort of irc bot and give him handlers in an array
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<Seppman>
ok, ill check those out too, thx
<apeiros_>
though, blocks, really, they're the thing for callbacks
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<Hanmac>
apeiros_ if you are interested, it is possible with C-Gems to add hooks to global variables ... so an funcion is called when an global variable is set
<JonnieCache>
yep use blocks
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<apeiros_>
bot.on_privmsg(/hi #{botname}/) do |message| message.reply("howdy #{message.from.nickname}") end
<Seppman>
apeiros_: so put the block into that array?
<JonnieCache>
or tbh use all three its not hard to support all of those things
<apeiros_>
Hanmac: I'm an enemy of globals, but thanks for the info :)
<apeiros_>
Seppman: if you want it in an array - yes, you'd have to use either procs then or some other way.
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<Hanmac>
and my favorite: "virtual" global variables: works like normal get and set, but does not hold an ruby-object it only calls the setted functions
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<Seppman>
ok, ill read about all those methods
<_marvin_>
cool irccloud :)
<luxurymode>
can i matcha regex on a file without using each_line?
<luxurymode>
file.readlines?
<_marvin>
i think with scan
<apeiros_>
luxurymode: you can just read the complete file
<apeiros_>
data = File.read(path)
<apeiros_>
data =~ regex
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<_marvin>
apeiros_, whats scan then useful for?
<apeiros_>
_marvin: scan is on String, not on File.
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<_marvin>
doo :)
<luxurymode>
apeiros_, thanks
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<luxurymode>
how can i place a variable, e.g some string, passed in a block into a regex?
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<luxurymode>
like each do |foo| if data =~ /#foo/
<luxurymode>
where #foo should be the passed var
<apeiros_>
#{}
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<apeiros_>
like with strings
<luxurymode>
inside the /?
<luxurymode>
cool
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<apeiros_>
notice that regex special chars are *not* escaped
<apeiros_>
meaning a "." in foo will mean "any character", just as if you'd written it in the regex directly.
<rippa>
Regexp.escape
<rippa>
escapes
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<elitheeli>
luxurymode: you might want String#include? if the regex is just /#{foo}/ and foo will just be a string
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<luxurymode>
elitheeli, gotcha. thanks
<luxurymode>
now, how can i find a file if i know its base_name and i have the root path
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<luxurymode>
but it could be anywhere recursivel
<luxurymode>
y
<luxurymode>
just use glob?
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<luxurymode>
im searching through a bunch of java files with with this regex /public class .+ extends (.+)/ and i just wanted when i puts $1 when i see the string PLUS a space and the curly brace for opening the class "{"
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<luxurymode>
how can i get exclude that? missing something basic in the regex here...
<Seppman>
pip: to_s ?
<wroathe>
Hey guys :) In the event that you've chained objects together (like in rails) and you're not sure if a particular object will have a method call is it better to use begin rescue end or test with respond_to?
* Seppman
goes for a bed
<elitheeli>
wroathe: the latter
<wroathe>
Is there a reason? Or do you just prefer that?
<elitheeli>
wroathe: more concise, faster, makes the semantic meaning more transparent
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<elitheeli>
Although I tend to try to design things such that I always know the types of what I'm dealing with and thus what their methods are
<apeiros_>
+1
<wroathe>
Yeah. I inherited a codebaes that's over 100,000 lines strong and his highly coupled. It's a little bit lofty to expect method calls to work now...
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<apeiros_>
sounds messy
<soulcutter>
wroathe: I feel your pain. I'm not sure this is the answer you're looking for, but I'd not do either thing (begin/rescue or check respond_to). If something is supposed to respond then assume it does until the errors roll in
<RubyPanther>
wroathe: the reason is that duck typing is very rubyish, it will be authoritative even if you don't know where your little duck has been, and then if there is a real error you will still get the exception normally
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<soulcutter>
wroathe: I guess I'd be concerned that you're masking a problem by coding too defensively
<RubyPanther>
it is more defensive to check sanity than to rescue everything, because rescuing everything can add bugs and can have side effects (like NOT getting rescued elsewhere)
<RubyPanther>
You can't be too defensive, you can only do it wrong ;)
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<soulcutter>
RubyPanther: not sure I agree on your last statement...
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<soulcutter>
kinda a nebulous topic to make generalizations about though
<apeiros_>
RubyPanther: you can do it wrong by being too defensive…
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<poisonarms_>
Can anyone point me in the direction of some good Ruby screencasts?
<poisonarms_>
FOr learning Ruby, that is.
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<shevy>
poisonarms_ no but you should learn ruby by writing scripts
<poisonarms_>
shevy, oh, yea, for some reason that happens when I copy/paste the script from Geany.
<shevy>
(or spaces. But I would use 2 spaces to indent)
<poisonarms_>
wmoxam, I see
<elitheeli>
poisonarms_: imagine a giant enum in C containing every single possible identifier in it. That's basically what Ruby symbols are, except they all start with a colon and have a few other bits of magic to them.
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<elitheeli>
poisonarms_: definitely use 2 spaces instead of tabs
<poisonarms_>
I use 4 spaces.
<poisonarms_>
No tabs.
<shevy>
hmm
<shevy>
on that codepaste though, when I copy paste the thing you wrote, I get a tab :/
<canton7>
I follow "tabs for indentation, spaces for alignment", but have the tabstop set to 2 :P
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<shevy>
I once mixed up tabs with aligning code comments
<shevy>
since that day I no longer use tabs
<elitheeli>
canton7: why do you do that to yourself?
<canton7>
elitheeli, I've found it to be the approach of last pain
<canton7>
everyone's had their own experiences, I guess
<elitheeli>
then if someone else is editing your code, alignment could get all screwy
<poisonarms_>
shevy, Pastebin also has all sorts of stupid crap in my reading space that I find offensive, ha. I prefer codepad - Must just be a problem with the formatting in Geany. Just went back and fixed it.
<poisonarms_>
Thanks for pointing that out.
<yxhuvud>
hastebin is pretty nice imo
<shevy>
yeah I would not know, I use pastie.org. the colours it offers for ruby scripts are nicest :)
<davidcelis>
gist or gtfo
<elitheeli>
+1
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<poisonarms_>
shevy, Oh I'm sorry, you DID say pastie.org
<shevy>
I'd never say anything else! pastie.org to THE DEATH!
<poisonarms_>
I like pastie, too, but I also like the code execution of codepad :P
<shevy>
DIE GISTERS DIE!!!
<shevy>
code execution?
<shevy>
live beheading and such?
<davidcelis>
shevy: ┬──┬ ノ( ゜-゜ノ)
<davidcelis>
chill out bro
<poisonarms_>
codepad.org compiles and executes the code you post.
<poisonarms_>
and shows you the output
<shevy>
argh an unreadable line attack by davidcelis
<shevy>
hmm
<shevy>
I see
<davidcelis>
shevy: time to use UTF-8
<elitheeli>
poisonarms_: so does "$ ruby filename"
<shevy>
davidcelis what for?
<davidcelis>
so you aren't living in the 70s
<poisonarms_>
elitheeli, As opposed to pasting your code on pastie.org or pastebin.com is what I'm saying.
<shevy>
yeah, I test the scripts locally before uploading or pasting
<davidcelis>
theres a whole, wide world out there, shevy!
<davidcelis>
a huge world filled with characters outside the scope of latin1!
<shevy>
davidcelis oh and it won't work for non UTF-8 really?
<shevy>
oh noes, I will not survive! :(
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<poisonarms_>
Well, who doesn't test locally first?
<elitheeli>
poisonarms_: but it didn't even work on your site because it didn't give you file write access
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<shevy>
poisonarms_ hmm do you really need the code execution part of codepad.org?
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<poisonarms_>
The rest of the code executes, besides, that would be awfully stupid of them to give the public write privileges through their code, yea?
<poisonarms_>
shevy, I don't NEED it, I just like it.
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<RubyPanther>
you could integrate try Ruby and the newer highlighting stuff
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<shevy>
poisonarms_ if you do happen to write a game in ruby, publish it on github or somewhere else :)
<shevy>
I am always looking to collect ruby games
<poisonarms_>
Who said anything about writing games? Haha.
<poisonarms_>
Although, I have been eyeballing that implementation of SDL.
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<atmosx>
burgestrand: okay but there's an 'else' clause there
<atmosx>
should tha flow go through "else"
<canton7>
luxurymode, I imagine (someone back me up here), that the method is defined after the point where it's called, and since you're not in a module/class, this makes a difference. Defining the method first fixes things
<burgestrand>
atmosx: no, because the errors happen on the if
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<luxurymode>
didnt see your response sorry
<atmosx>
burgestrand: oh didn't knew that
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<atmosx>
burgestrand: so what is the best way to deal with this, reverse the if/else?
<atmosx>
or maybe adding elsif
<burgestrand>
atmosx: if @database and File.exists?(@database)
<luxurymode>
canton7, crap but now i need instance variables, no? to access project_files?
<canton7>
luxurymode, just write yourself a class or module, depending on what you need
<luxurymode>
canton7, gotcha
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<luxurymode>
apparently i can have instance variables right in there though, no?
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<luxurymode>
works fine...
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<atmosx>
burgestrand: that didn't work either
<atmosx>
same error
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<burgestrand>
atmosx: not same error, new line
<atmosx>
what do you mean?
<burgestrand>
atmosx: it’s not the same error
<atmosx>
oh
<atmosx>
hmmm
<atmosx>
give me a sec to try something and I'll recreate it
<atmosx>
and re-check if it's the same
<burgestrand>
atmosx: it’s from your db = SQLite3::Database.new call
<burgestrand>
atmosx: you don’t check if @database is nil there either
<atmosx>
in theory I check on the first line… now apparently I've got it all wrong hehe
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<atmosx>
burgestrand: you're right
<atmosx>
did you reproduce the error or did you see that comming ? (out of curiosity)
<burgestrand>
atmosx: saw it coming :)
<burgestrand>
atmosx: after that I reproduced to make sure I was right ;)
<atmosx>
hahah okay, now please explain why it was so obvious, this is a function which in theory should create the db
<atmosx>
since it does not exist :-P
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<burgestrand>
atmosx: you never check if @database is nil
<burgestrand>
atmosx: you only do it for the first condition
<burgestrand>
atmosx: but in your else, @database can be nil
<burgestrand>
atmosx: and then it will error
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<burgestrand>
atmosx: and it’s not necessarily obvious, I’ve just done it many times myself in the past I learn to see it
<atmosx>
burgestrand: oh, nice I feel better now hehe
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<burgestrand>
atmosx: it’s easier for others to see errors in your code because they have no assumptions about it, but you have since you wrote it :)
<atmosx>
however, thing is @database should never be nill
<apeiros_>
then ensure that in initialize
<burgestrand>
apeiros_: wb :D
<apeiros_>
was I gone?
<apeiros_>
hi burgestrand :)
<burgestrand>
apeiros_: you were gone for almost two weeks in beginning to january, were wondering where you’d gone :o
<burgestrand>
apeiros_: but now you’re back so it no longer matters ^^
<apeiros_>
hm, might be that I wasn't on as frequently, had and still have fought with a nasty cold. never gets serious but never getting really cured of it :-S
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<burgestrand>
apeiros_: naw, I did /seen on you and it was up to 13 days, you were gone I promise :p
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<burgestrand>
apeiros_: … anyhow, glad it’s just a cold :)
<burgestrand>
now bedtime for me
<apeiros_>
obviously I got abducted by aliens
<apeiros_>
gn8, should go too I guess…
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