From: why the lucky stiff <ruby-talk@...>
Date: 2005-08-02T06:36:35+09:00
Subject: Re: array in array, like include?

Ben wrote:

>Is there a function to checking to see if the elements of one array
>exist in another?
>
>a = [1,2,3,4,5]
>b = [1,4]
>  
>
Elsewhere...

  >> a = [1,2,3,4,5]
  >> b = [1,4]
  >> (b-a).empty?
  => true

  >> c = [6, 4]
  >> (c-a).empty?
  => false

_why