From: Rick DeNatale <rick.denatale@...>
Date: 2006-10-26T08:26:47+09:00
Subject: Re: simple math question

On 10/25/06, Brad Tilley <rtilley@vt.edu> wrote:
> What's the quickest way to determine if an int is an even number
> 2,4,6,8...
> Anything such as int.even or int.odd returning true/false? I want to
> test the length of an array and add one element to it if it has an odd
> number of elements.
>
> Thank you!

Integer#[n] returns a 1 or 0 corresponding to bit n, with n=0 being
the least significant bit.

so

Even:
    an_int[0].zero?

Odd:
    an_int[0].nonzero?

-- 
Rick DeNatale

My blog on Ruby
http://talklikeaduck.denhaven2.com/