From: Alex Young <alex@...>
Date: 2006-06-19T22:27:14+09:00
Subject: Re: Is it more convenient to have a random_each in ruby stdl

Leslie Viljoen wrote:
> On 6/19/06, uncutstone wu <uncutstone@sina.com> wrote:
>> Kroeger, Simon (ext) wrote:
>> >>      def random_each
>> >>
>> >>
>> >> uncutstone
>> >
>> > I think it's a little bit to simple to be put in the standard lib.
>> >
>> > a.sort_by{rand}.each {|e| print e , ' '}
>> >
>> It is nice to see you make it so simple!
> 
> Surely this would break some sort algorithms, since the same element
> can return different sort priorities (using rand)... I assume it
> doesn't break Ruby's sort algorithm?
> 
sort_by generates the block value once for each collection element then 
uses that value for a standard sort, so it's not a problem.

-- 
Alex