From: Bill Kelly <billk@...>
Date: 2006-04-20T01:49:33+09:00
Subject: Re: Is there an "in" operator in ruby ?

From: "Jake McArthur" <jake.mcarthur@gmail.com>
>
> If Array was extended with some set theory, things like this would be  
> possible:
> 
> @test.intersect([1..10]).each { |item| puts item }

>> x = [*1..5]
=> [1, 2, 3, 4, 5]

>> y = [*3..7]
=> [3, 4, 5, 6, 7]

>> x & y
=> [3, 4, 5]

>> x | y
=> [1, 2, 3, 4, 5, 6, 7]

>> x - y
=> [1, 2]

>> y - x
=> [6, 7]


Regards,

Bill