From: dblack@...
Date: 2006-12-21T00:15:10+09:00
Subject: Re: tricky sort for happy visitors of Paris

Hi --

On Thu, 21 Dec 2006, Josselin wrote:

> all happy visitors of Paris know about the 'arrondissement', an 
> administrative division of the city...  20 divisions
>
> selecting them from a city table I can map them as :
>
> ['Paris 1'  , 'Paris 10' , 'Paris 11' , .....  'Paris 19' , 'Paris 2' , 
> 'Paris 20' , 'Paris 3' , .... 'Paris 9' ]
>
> is there any way to sort this array and get :
>
> ['Paris 1'  , 'Paris 2' , 'Paris 3' , .... 'Paris 9' , 'Paris 10' , 'Paris 
> 11' , .....  'Paris 19' , 'Paris 20' ]
>
> which seems betetr in a list... ;-))

You could do:

   arronds.sort_by {|a| a[/\d+/].to_i }

That will grab the digits, convert them to an integer, and sort based
on that.


David

-- 
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