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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<kenyabob>
new to ruby, want to subtract dates. Why is this giving me an error?
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<kenyabob>
Ive updated it with my output
<kenyabob>
This gives me an internal server error
<ryanf>
ah yeah that'll work, except
<ryanf>
you can't concatenate non-strings onto a string
<kenyabob>
I'm on 1.8.7
<ryanf>
use interpolation
<ryanf>
"<br/> She is #{age}"
<kenyabob>
got it, I need to convert it
<kenyabob>
I see
<ryanf>
also that number is not what you want
<ryanf>
it'll be like
<ryanf>
seconds or milliseconds
<ryanf>
not the kind of thing that you put in the sentence "She is #{age}"
<davidpk>
seconds w/ floating point
<fulcan>
ok, I am a graphics and bomips hater whom decided he finally needed to learn something web/graphic oriented in order to move forward. I dispise javascript and even after 2 semesters in java programming I still think it's trash. c++ and php/python have done me fine in the past. I gave jquery about 2 weeks and now throwing in the towel on that one. What's ruby like with graphical function? should I even try?
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<fulcan>
wow, ruby appears worse than jquery.
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<kenyabob>
ryanf: I essentially want a time object, so I can easily output if they are so many years old, or days old, etc
<ryanf>
that guy's got it all figured out
<ryanf>
ah yeah I'm not sure there's anything very helpful in stdlib for that
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<freelanceful>
hey guys.. I need an input field called Skills to display the string split by commas
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<cconstantine>
I'm trying to apply a mask to an existing rmagick Image, and having a hard time with it. Has anyone done something like this?
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<C0deMaver1ck>
any recommendations for an irc client library? Seems the only one (semi?)actively maintained is Yail
<banister`sleep>
C0deMaver1ck: i think there's one called cinch
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<dominikh>
C0deMaver1ck: while Cinch is marketed as an irc bot framework, there's no reason you cannot use it for more generic, or other specific, IRC tasks.
<C0deMaver1ck>
that's what I was just about to comment on lol
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<Dexx1_>
Is it hard for a beginner to setup ruby on rails on arch linux?
<Dexx1_>
ie: Do I need a domain + hosting etc. to build a full fledged application
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<dagnachewa>
hi all
<hkhalid>
hi
<hkhalid>
welcome back
<dagnachewa>
I installed pry for global after issuing rvm gemset use global andf then I did gem install pry I got this http://pastie.org/3193145
<Banistergalaxy>
dagnachewa: pry is weird
<dagnachewa>
ok
<hkhalid>
I'm a cybernetic organism. Living tissue over a metal endoskeleton.
<dagnachewa>
Banistergalaxy, from that info it's only the doc having issue right
<Banistergalaxy>
dagnachewa what info? Repaste
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<sacred_coder>
chammak challo
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<hemanth>
sacred_coder, kamal reddy
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<Milossh>
hey; I have problems with passenger and apache on macosx xampp. I have installed it properly, but I get "[notice] child pid 7169 exit signal Bus error (10)" whenever I load the webpage
<Milossh>
no other errors so far. I have checked, and PassengerRoot is what's making probs. If I uncomment that in apache conf, everything loads just fine(not the app I want to run via passenger, but apache works- I can't load anything if I leave it)
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<mr-green>
I am getting a number from the user
<mr-green>
if the user inputs anything other than a number, I have to prompt them to give me a number
<mr-green>
how do I check for that?
<mr-green>
I tried if(input.class != (Fixnum||Bignum)
<mr-green>
puts "Enter a number"
<mr-green>
that is not working
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<becom33>
from a string like this "test cap lol123" how can remove "lol123" and get "test cap" as a output / I know I should use regex , but bit confused
<rippa>
mr-green: input is always a string
<rippa>
use String#to_i
<peterhellberg>
becom33: "test cap lol123".gsub.(' lol123', '') :)
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<mr-green>
rippa: okay I'll try that. thank you!
<rippa>
mr-green: or use Kernel#Integer
<becom33>
peterhellberg: wait lemme try that out
<mr-green>
what is Kernel#Integer?
<mr-green>
I am sorry, but I am very new to this
<rippa>
method
<mr-green>
I see.
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<mr-green>
and how should I use Kernel#Integer
<mr-green>
?
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<peterhellberg>
becom33: That would return "test cap" _if_ you always get "lol123" in the string that is
<becom33>
peterhellberg: Im getting a error test.rb:2: syntax error, unexpected ',', expecting $end
<becom33>
puts "test cap lol123".gsub.(' lol123', '')
<peterhellberg>
Heh, oops… remove the dot in "gsub.("
<becom33>
peterhellberg: it works :)
<mr-green>
rippa: I used string#to_i, but 0 is also a valid integer. i am calculating factorial. so if I input a string, the factorial is displayed as 0.
<rippa>
mr-green: Integer(string)
<rippa>
if it's not a valid number it'ss raise an exception
<rippa>
*'ll
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<mr-green>
rippa: my input variable is called input
<mr-green>
so I do input(string)?
<rippa>
Integer(input)
<mr-green>
oh ok
<mr-green>
that makes more sense
<mr-green>
thank you so much!
<mr-green>
but if input is always a string, it will always raise an exception
<rippa>
no
<rippa>
Integer("10") #=> 10
<mr-green>
oh
<mr-green>
interesting
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<mr-green>
thank you rippa!
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<mr-green>
one more question, if I take in the input as 10.4, will Integer(input) raise an exception?
<rippa>
yes
<mr-green>
is there a Float(input) also?
<rippa>
yes
<mr-green>
oh okay
<mr-green>
that clears it up
<mr-green>
Thank you!
<mr-green>
so even if someone enters something like 10.4 when I am expecting an integer,
<mr-green>
I can do Integer(Float(input)) to calculate the factorial for the integer part, ie, for 10. Is that correct?
<mr-green>
let me try that before you answer.
<mr-green>
thank you rippa!
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<rippa>
np
<rippa>
or Float(input).to_i
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<mr-green>
oh ya. I didn't think of that
<mr-green>
rippa: thanks again!
<mr-green>
rippa: this is good, but I'd like to be able to give the user another chance to input a valid number
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<mr-green>
The problem with rasing the exception is that it exits the program
<rippa>
catch it
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<rippa>
read about handling exceptions in ruby
<mr-green>
oh okay
<mr-green>
will do that
<rippa>
one-liner would be something like
<mr-green>
will report back in a while then. thank you!
<rippa>
Integer("input") rescue puts "try again"
<mr-green>
ah
<mr-green>
yes
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<mr-green>
I was just reading about rescue
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<mr-green>
rippa: are you there?
<rippa>
yes
<mr-green>
I entered this code now to handle the exception
<mr-green>
while(number)
<mr-green>
begin
<mr-green>
break if (Float(Integer(number)))
<mr-green>
rescue
<mr-green>
puts"Please enter only numbers"
<mr-green>
number = gets
<mr-green>
end
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<mr-green>
that is breaking from the while loop, but it is not executing the code after it
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<rippa>
mr-green: one more end
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<mr-green>
oh damn
<mr-green>
you are right
<mr-green>
so stupid of me
<mr-green>
thanks!
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<mr-green>
rippa: Thank you for all your help. My program is running perfectly now!
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<banister`sleep>
mr-green: buy him some krokodil in return
<mr-green>
what's that?
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<MarcWeber>
How to find out who or what title is and what it defines?
<MarcWeber>
Making a typo causes ruby to print local var or method.
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<MarcWeber>
Now How do I fund out whether its a mehtod or a local var?
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<Tasser>
MarcWeber, defined(<variable here>)
<Tasser>
ehh defined?()
<MarcWeber>
thx
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<Tasser>
MarcWeber, beware, defined?() is syntax, not a method.
<Tasser>
MarcWeber, it's similar to sizeof in C
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<linopolus>
Hi
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<linopolus>
I want to install iconv gem on freebsd, but it won't compile it's extension because the search path doesn't include /usr/local/lib/, where iconv is located. How do I tell gem to search there? Logs are here: http://pastie.org/3194849http://pastie.org/3194964
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<MarcWeber>
Is ruby-debug19 the plugin you recommend for debugging or just require 'debug' using latest ruby 1.9.3?
<MarcWeber>
linopolus: try --help. Often additional args like --with-iconv="/usr/local" or such are supported - when the build fails it prints such a message ocassionally.
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<MarcWeber>
Mm iconv doesn't print it.
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<prs`>
running out of heapspace when downloading a file like this: https://gist.github.com/1621007 is there a way to stream the file to disk?
<prs`>
using jruby
<prs`>
should i perhaps to it the other way around?
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<linopolus>
MarcWeber: so you don't know how to do it?
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<MarcWeber>
linopolus: At the moment: no. You may vant to have a look at the build directory. It often contains a README or some additional information.
<linopolus>
where can I find it?
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<MarcWeber>
gem --help. Watch output. It often contains hints. If it doen't you have to digg into code. But maybe you should join #bsd first or ask on the mailinglist
<MarcWeber>
May take less of your time.
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<nlko_>
hey, i have a binary string "0111110001" and "11110000111". what int format do those need to be in to do a xor? ^ operation on them
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<nlko_>
i guess just a to_i should work
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<lteo>
any ruby mail users here? i'm trying to make it parse a mail as regular US-ASCII and not automagically convert it to UTF-8
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<nlko_>
two binary input strings are the same length but different, so "11111" and "11101"
<nlko_>
at the moment i have result = "11111".to_i ^ "11101".to_i
<nlko_>
result.to_s(2)
<nlko_>
but te result is much longer
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<csavola>
nlko_: "11111".to_i is not the binary number 11111 it is the decimal number 11111
<nlko_>
ah
<nlko_>
csavola: so what do i need?
<peterhellberg>
nlko_: You save quite a few bytes by XORing (considering 1111 is the binary string "10101101100111")
<csavola>
nlko_: read the link again... you missed a parameter
<peterhellberg>
11111 ^ 11101 on the other hand is 58 == "111010"
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<nlko_>
csavola: to_i(10)?
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<csavola>
nlko_: that would convert to a base 10 number....
<peterhellberg>
10101101100111.to_i(10)
<peterhellberg>
Sorry, wrong terminal :)
<nlko_>
i dont know
<csavola>
nlko_: binary is base 2
<nlko_>
yes, i had to_i(2) and you said it was decimal
<csavola>
nlko_: to have to_i without parameters... which defaults to to_i(10)
<nlko_>
ah ok, thanks
<nlko_>
so now i have "result = 11111".to_i(2) ^ "11101".to_i(2)"
<nlko_>
result.to_s(2) to give the result in binary yes?
<csavola>
nlko_: try it :)
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<nlko_>
yep its working, though i thought the length would be the same thats why i was concerned, but i guess like peterhellberg says, i save some bytes
<csavola>
nlko_: all binary operations will be the same resultant length
<csavola>
nlko_: that was brutal... all binary operations must have the same number of bits as the greatest input
<nlko_>
csavola: the length is different
<csavola>
nlko_: can you gist the code you have"
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<peterhellberg>
"000000000000000000001".to_i(2) is just a binary "1"
<csavola>
nlko_: that's up to you to figure out
<nlko_>
ok, so that code is working as expected then though right?
<csavola>
nlko_: it appears so
<nlko_>
thanka guys
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<hkhalid>
hi
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<Planet_EN>
I installed the oauth2 gem, if I do require 'oauth2' in irb it works but it doesn't work in a file
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<Planet_EN>
this is so annoying... why can't things just work.. end
<waxjar>
are you using it with some kind of framework you run from the command line?
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<Planet_EN>
running the file from command line
<Planet_EN>
ruby filenamer.rb
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<waxjar>
try to ctrl + c it and run it again if you haven't already.
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<Planet_EN>
tried already
<Planet_EN>
doesnt work
<Planet_EN>
`require': no such file to load -- oauth2 (LoadError)
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<Planet_EN>
however it works in irb
<Planet_EN>
>> require 'oauth2'
<Planet_EN>
=> true
<Planet_EN>
>>
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<apeiros_>
Planet_EN: a) check your irbrc, b) what ruby version?
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<Planet_EN>
ruby 1.8.7
<apeiros_>
Planet_EN: you probably require 'rubygems' in your irbrc, but don't in your script
<apeiros_>
you must require 'rubygems' before requiring gems.
<apeiros_>
as of ruby 1.9, that's no longer the case, rubygems is loaded there from start (per default)
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<Planet_EN>
cool
<Planet_EN>
worked when I added require 'rubygems' to the file
<Planet_EN>
thanks
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<idarkside>
hi im having an issue with the mysql gem
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<idarkside>
no such file to load -- mysql (LoadError)
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<apeiros_>
idarkside: what ruby version?
<idarkside>
1.9.3
<idarkside>
rvm
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<apeiros_>
how did you install mysql?
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<idarkside>
gem install mysql
<idarkside>
or the server n client by apt-get
<apeiros_>
since you have rvm and probably more than one ruby installed - did you make sure you installed it for the right ruby version?
<rustifer>
I'm sorry to bother you but I had an activerecord question - foo.find( params[:id], :include=>:bar ), but some bars have been deleted from database. Is there a different way to call ":include" that won't choke if something's been deleted?
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<apeiros_>
rustifer: activerecords is over in #rubyonrails (even for non-rails projects)
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<rustifer>
oh! thanks. Sorry.
<apeiros_>
np
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<idarkside>
apeiros_
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<idarkside>
i have 193 and 187 but i r
<idarkside>
tro
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<idarkside>
arrg lol
<idarkside>
i tried apt-get remove ruby with no avril
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<idarkside>
n rvm list only can see 1.9.3
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<apeiros_>
when running `gem env`, what does it say under RUBY EXECUTABLE?
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<apeiros_>
and that tells you that you're installing your stuff for your 1.8 ruby
<idarkside>
ah ty lol
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<Gate>
apparently there is no robot here that understands !gist :)
<apeiros_>
idarkside: rvm use 1.9.3; then gem install mysql
<idarkside>
ty
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<idarkside>
i ay clean install to remove ruby ;)
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<td123>
for instance, I want a and b point to seperate instances of a string, but I would like to have a neat way to initialize them with something like a = b = ""
<Gate>
td123: that works. Try: a = b = ""
<Gate>
a = "bob"
<Gate>
puts b
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<deryl>
td123: iirc, when you do it that way they point to the *same* string i thought
<td123>
Gate: deryl ya I want a different string
<td123>
also for instance a = b = []
<td123>
a << 2
<Mon_Ouie>
a = ""; b = ""
<Gate>
td123: well, you *could* do a,b = ["",""]
<td123>
puts b prints out [2]
<Gate>
not that I would suggest it
<Mon_Ouie>
Gate: No, what you first said didn't work
<td123>
I have like 20 variables to initialize so I wanted to find anicer way :)
<Gate>
right, the second assignment changes what a points to. duh.
<deryl>
a = "" ; b = "" ; a = 2 ; puts b does what you want
<Mon_Ouie>
a = "bob" doesn't affect b because it isn't a method call
<deryl>
like Mon_Ouie said
<apeiros_>
td123: you might want to organize your data in a different manner then…
<apeiros_>
Array.new(20) { "" }
<deryl>
Mon_Ouie: is there a way to force ruby to make two *different* strings in the same call? like a .dup type call?
<deryl>
at all
<td123>
apeiros_: it's just the nature of the data, there really isn't a better way to organize it
<td123>
afaik
<apeiros_>
td123: all I have is your word for it :-p
<deryl>
or is it *only* possible to do it like the a = "" ; b = ""
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<deryl>
this is where *my* knowledge lacks
<td123>
apeiros_: I guess I could store it in a hash
<apeiros_>
anyway, even if you don't want to use an array, you can still use the thing above
<td123>
apeiros_: that's probably the only other sane way to store this
<Gate>
td123: then a,b,c,d = (0..4).map { |x| "" }
<apeiros_>
a,b,c,… = *Array.new(20) { "" }
<Gate>
lol, apeiros_ nice
<apeiros_>
Gate: you can omit the |x|
<Gate>
true, pointless to have it. just habit
<td123>
apeiros_: that looks nice, thanks :)
<Mon_Ouie>
Also, don't forget (0..4) is 5 elements
<td123>
0...4 is 4 :)
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<Gate>
so d would contain an array of two elements
<Mon_Ouie>
No
<Mon_Ouie>
The last element would be thrown away, but it may matter in some other cases
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<td123>
thanks all
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<td123>
apeiros_: I'm trying to automate writing certain types of scripts, so it isn't going to be exactly pretty :P
* apeiros_
thinks from..to with wrong to and rand(num_elements) with wrong num_elements are the most often made mistakes in ruby wrt numbers
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<apeiros_>
td123: you should use VBA to make pretty automation scripts
* apeiros_
runs for cover
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<Mon_Ouie>
rand(range) may make the latter mistake less common
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<apeiros_>
maybe, but I'm pretty sure it'll stay pretty common
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<Hanmac>
hm how should i convert an std:wtring to an ruby string in the C interface?
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<Jarred>
Is there no error messages with ActionMailer?
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<apeiros_>
Object.new.somemethod(self) ?
<cek>
eh, that's primitive. I want very elegant and sugared solution
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<apeiros_>
there's only bad design ones like storing self in Thread.current[…]
<apeiros_>
but really, that's bad coupling…
<cek>
oh..
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<cek>
the app is multithreaded, btw
<yxhuvud>
well, it may be that it is instance_exec he is after
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<apeiros_>
yxhuvud: possible. but I don't think so due to .somemethod
<cek>
instance_exec is how I change the "context" . is it possible to invoke it for each line of ruby code in that lambda?
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<cek>
s/lambda/block/
<yxhuvud>
uh, I don't understand why you would want it once for each line.
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<cek>
indeed, that's a bad design. but the root are in erb
<cek>
you see, I want to be able to acess NewContext's instance variables withing erb view that will be rendered
<yxhuvud>
hmm
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<yxhuvud>
interesting problem. I'm glad I havn't had to solve it :)
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<cek>
yea, it ain't trivial one. thanks for help anyway
<yxhuvud>
but if I were to guess I'd say that the easiest way should be to mix in whatever is needed into the correct scope once, and pray to god there are no conflicts :p
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<apeiros_>
cek: as said, an ugly solution is to use Thread.current and Thread#[], #[]=
<yxhuvud>
or dig into erb and do some kind of proxy. Is this for rails or something else? if the former, then I have seen some places that might be useful where the templates are compiled into methods
<apeiros_>
if it's only about ivars, you could "infuse" instances with them using instance_variable_set
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<cek>
yep, gonna redesign it.
<cek>
that ain't rails, otherwise it would be better . it's a customary high effecience message dispenser
<cek>
ought to be!
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<yxhuvud>
I think erb templates accept a binding for .result though, so it might as simple as template.result(binding)
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<ziyadb_>
!topic
<ziyadb_>
err.
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* Swanify
Waits for ziyadb_ to accidentally paste his next channel move
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<ziyadb_>
Swanify: #cisco
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<strife25>
hi all, i was wondering if there were any best practices that need to be followed when writing setup.rb files like there are for structuring Gems?
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<visof>
what is the best way to parse url that is xml content ?
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<dr_bob>
URL or the content which is located at the URL?
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<Jarred>
How do I send mail with ActionMailer that the view is in HTML and with attachments? Right now, it's sending the messages with the headers and in base64
<deryl>
Jarred: thats a #rubyonrails question, not ruby. ask in #rubyonrails
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<tesmar>
is there a way to convert a double qouted string to a single quoted?
<tesmar>
or to take everything as literal in a particular string/
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<dankest>
tesmar: Could you use a regex to strip it or something?
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<ale`>
I'm kind of lost with raise, throw, catch and rescue. What's the difference between f1 and f2 https://gist.github.com/1623162 ?
<ale`>
ops, f1 and fungo2 :-)
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<Hanmac>
ale` the difference is that fungo2 does not work :P
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<Hanmac>
you can only raise an exception
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<ale`>
works for me, same results as f1 :O
<ale`>
I tried it on irb before posting :P
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<Hanmac>
then you does not check the exception ... fungo2 does fail because of raise: "TypeError: exception class/object expected"
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<ubercore>
Hi all! I want to set two mappings in a YAML document with the same name. I'm serializing from a Ruby Hash, which obviously overwrites the second key with the same name. Any good suggestions on how to deal with this?
<ale`>
Hanmac: mhm, so with raise I can only throw <Exception and strings ?
<Hanmac>
yep, but you can cast other objects with to_s into strings
<ale`>
Hanmac: is catch some kind of syntactic sugar over a begin/rescue/end block that has the rescue part always nil or there is some other difference?
<ale`>
(apart from the fact you can only raise Exceptions and strings I mean)
<idarkside>
im offering
<idarkside>
shud be a 10 min job
<idarkside>
pm me
<Hanmac>
not realy, as you can only catch and throw symbols ...
<Hanmac>
but i does not like catch and throw ... it smells a bit like goto
<Hanmac>
i would ayoid both if possible
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<burgestrand>
catch and throw is nice because you can throw data along with the symbol
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<visof>
hi
<visof>
if i have array , how can i take values twice at the same time to can convert this array to hash?
<visof>
[1, "one", 2, "two"] as example want to convert that to hash = {1 => "one", 2 => "two" }
<burgestrand>
visof: Hash[]
<apeiros_>
visof: Hash[array]
<apeiros_>
oh, actually might be Hash[*array]
<visof>
?
<visof>
i can't understand
<apeiros_>
yeah, the latter
<apeiros_>
fire up irb and try, there isn't too many ways to read that.
<visof>
got it
<visof>
that's amazing
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<visof>
apeiros_: but what if the array has odd numbers, that will return error
<visof>
is there a way to fix that?
<burgestrand>
visof: what do you want to do then_
<visof>
burgestrand: convert array to hash, but i must have even number of array length to can convert to hash, but can i intialize values to zeros for odd numbers?
<burgestrand>
visof: add a zero to the end of the array if it’s an odd number of items in it?
<visof>
as example: [1, "one", 2, "two", 3] to {1 => "one", 2 => "two", 3 => 0}
<visof>
that's goot
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<Hanmac>
array << 0 if array.size.odd?
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<apeiros_>
visof: yes, fix the array.
<apeiros_>
converting an odd sized array makes no sense.
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<dankest>
Has anyone here used watir? Is there a way to click and download links from a watir browser window?
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