From: Louis J Scoras <louis.j.scoras@...>
Date: 2007-02-21T07:01:58+09:00
Subject: Re: exit a block

On 2/20/07, Jim Bob <james_b@anytimenow.com> wrote:
>
> Thanks for your help, sometimes best just to program an old fashion for
> loop ;)

Nahh, more abstraction is a good thing =)

    require 'enumerator'
    class Array
      def find_my_index(x,y)
        to_enum(:each_with_index).each_cons(2) {|(a,i),(b,_)|
          return i if a == x && b == y
        }
        nil
      end
    end

And then it's just:

    ary = [43,21,56,12,93,12]

    puts ary.find_my_index(12,93)  # => 3
    puts ary.find_my_index(93,12)  # => 4
    puts ary.find_my_index(56,100) # => nil


-- 
Lou.