From: Joel VanderWerf <vjoel@...>
Date: 2005-08-02T02:54:45+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]
> 
> a.include?(b) will only work if b is a string. I'd like to get a
> true/false if b exists in a.
> 
> Thanks!
> Ben
> 

require 'set'

[1,4].to_set.subset?([1,2,3,4,5].to_set)

=> true

-- 
      vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407