From: botp <botpena@...>
Date: 2011-02-05T01:30:07+09:00
Subject: Re: Arrays and defs

On Fri, Feb 4, 2011 at 8:04 PM, Jens Finnäs <jens.finnas@gmail.com> wrote:
> Is it not possible to call an array outside a defintion? Like this:
> list = Array.new
  ^^^^^ lose this. not needed since you created list below

> list = ["a", "b", "c"]
>
> def do_stuff()
>  list.each_index do |i|
>    puts list[i]
>  end
> end
> do_stuff()

list would not be visible since we're in oo env and encapsulation is enforced.

> If I define list inside do_stuff() the script works. My plan was to
> build an array through several functions.

since you're doing it procedurally, then why not pass list as a param.

eg,

def do_stuff(list)
 list.each_index do |i|
   puts list[i]
 end
end
#=> nil

list = ["a", "b", "c"]
#=> ["a", "b", "c"]
do_stuff(list)
a
b
c
#=> ["a", "b", "c"]


scheme 2, you can make list a class variable,

eg,

def do_stuff
 @@list.each_index do |i|
   puts @@list[i]
 end
end
#=> nil

@@list = ["a", "b", "c"]
#=> ["a", "b", "c"]
do_stuff
a
b
c
#=> ["a", "b", "c"]


best regards -botp