From: Ian Macdonald <ian@...>
Date: 2002-08-07T15:54:29+09:00
Subject: Re: sort problem

On Wed 07 Aug 2002 at 14:31:47 +0900, WATANABE Hirofumi wrote:

> Ian Macdonald <ian@caliban.org> writes:
> 
> :Ruby
> :----
> :
> :$/ = nil
> :foo = gets.split("\n")
> :r = /^([a-z]+)([0-9]+)$/
> :foo = foo.sort {|a,b| c,d = r.match(a)[1,2]
> :                      e,f = r.match(b)[1,2]
> :                      c <=> e or d.to_i <=> f.to_i}
> :puts foo
> 
> How about Array#<=> ?
> 
>   [c, d.to_i] <=> [e, f.to_i]

Ah, very elegant indeed! Thanks for this idiom.

Ian
-- 
Ian Macdonald               | Collaboration, n.:  A literary partnership 
ian@caliban.org             | based on the false assumption that the 
                            | other fellow can spell. 
                            | 
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