Very noob question about class variables

Ruby
1

Hi…I’m learning rub…I know a bit about Python but I’m interested in
use rails…I made a little program but this has a little bug too…for
simplify this I dont post the program but I post a example

if I declare
var=‘hi’

def greeting
puts var
end

greeting()
greting

Do I need declare this like class variable necessarily?..inside my def
ruby can’t see outside?..

ok…I declare this like a class variable…Now…I need a counter like
this

i=0

loop {
i+=1
puts ‘hi again’

if i>100000: break end

}

why in this block I can see the outside value for i and inside the def
block I can’t??

I should not use “standart” variables like variable instead use
@@variabl??

Please explain me this…and sorry for my poor english…I’m italian

2

On Dec 18, 9:48 pm, Angel M. [email protected] wrote:

I should not use “standart” variables like variable instead use
@@variabl??

Please explain me this…and sorry for my poor english…I’m italian

Posted viahttp://www.ruby-forum.com/.

Class variables are for use like this:

Class Supah
def setVar(val)
@@var = val
end

def printVar
puts @@var
end
end

a = Supah.new
a.setVar ‘hi’

b = Supah.new
b.printVar

=> “hi”

Class variables are simply variables that you can access from any
instance of the class.
To get a variable inside a def, you can pass it in like a parameter,
or you can use a global variable, a var prefixed by $.
In ruby, variables declared outside a function are not part of that
functions scope.
Hope this helps.