From: uncutstone wu <uncutstone@...>
Date: 2006-06-20T02:05:22+09:00
Subject: Re: Is it more convenient to have a random_each in ruby stdl

Matthew Smillie wrote:

> I agree with you about 'arr.shuffle.each' being better semantically,
> but I was worried about efficiency; since the thread started out with
> concerns about shuffling really big arrays, I wanted to avoid
> creating an intermediate copy of the array.  I didn't really think
> about it that hard, though, because thinking about it now, I realise
> an intermediate copy isn't all that bad (being just references), so
> I'm not sure the savings would matter all that much.

Yes, since array just stores object references, (0...size).to_a is as 
large as aArray.dup, they cost same time and space.

Best Regards.

uncutstone

-- 
Posted via http://www.ruby-forum.com/.