From: Devin Mullins <twifkak@...>
Date: 2005-09-22T19:45:20+09:00
Subject: Re: hi, i'm new. plus one question

Daniel Sheppard wrote:

>pop (and it's cousin 'shift') can't return a new array, because they're
>busy returning the last (or first) element of the array.
>  
>
Well....

class Array
  def pop_
    ary = dup
    [ary.pop, ary]
  end
  def shift_
    ary = dup
    [ary.shift, ary]
  end
end

a = [1,2,3,4]
n, b = a.pop_ #=> [4, [1, 2, 3]]
n #=> 4
b #=> [1, 2, 3]
a #=> [1, 2, 3, 4]

Devin