From: Guillaume Cottenceau <gc@...>
Date: 2001-08-24T21:09:06+09:00
Subject: [ruby-talk:20278] Re: In Ruby 0 is true but nil is false.. or how to shoot yourself?..

Dave Thomas <Dave@PragmaticProgrammer.com> writes:


[...]

> Try 'nonzero?'
> 
> dave[~ 13:17:19] ri nonzero
> ------------------------------------------------------- Numeric#nonzero?
>      num.nonzero? -> num or nil
> ------------------------------------------------------------------------
>      Returns num if num is not zero, nil otherwise. This behavior is
>      useful when chaining comparisons:
>         a = %w( z Bb bB bb BB a aA Aa AA A )
>         b = a.sort {|a,b| (a.downcase <=> b.downcase).nonzero? || a <=> b }
>         b   #=> ["A", "a", "AA", "Aa", "aA", "BB", "Bb", "bB", "bb", "z"]


Thanks a bunch Dave! As usual, you got the perfect solution..



-- 
Guillaume Cottenceau - http://people.mandrakesoft.com/~gc/