From: Frederick Cheung <frederick.cheung@...>
Date: 2008-08-20T01:41:57+09:00
Subject: Re: Array API


On 19 Aug 2008, at 11:15, Tushar Gandhi wrote:
>>
>>> How it is possible that we are able to use enumerable sort_by method
>>> for
>>> an array of object?
>>>
>> Because that's what including a module does: it adds the methods
>> defined in the module to the class.
>>
>> Fred
>
> Hi,
>  Is sort_by method will cause performance problem? or Is it faster
> sort?

It's what is often known as a schwartzian transform.
Joss Susser wrote some stuff up on sort/sort_by just a few days ago: http://blog.hasmanythrough.com/2008/8/17/sorting-things-out

Fred