From: "ara.t.howard" <ara.t.howard@...>
Date: 2008-09-11T05:07:17+09:00
Subject: Re: How to operate on 2 arrays simultaneously?


On Sep 10, 2008, at 1:45 PM, Joel VanderWerf wrote:

> It's less dramatic when the entries are not nil (or fixnum etc)--I  
> think that's Matt's point.
>
> mb = 2 ** 20
>
> big = 2 * mb
>
> a = Array.new big do |i| "the string for entry #{i}" end
> b = a.dup
>
> memory_usage = `ps -o rss= -p #{Process.pid}`.to_i
> puts memory_usage
>
> a.zip(b)
>
> memory_usage = `ps -o rss= -p #{Process.pid}`.to_i
> puts memory_usage
>
> __END__
> 213256
> 322232

true enough - my point is that the block form is much better when the  
arrays are big, without it the new array, pointers or not, is created.

cheers.

a @ http://codeforpeople.com/
--
we can deny everything, except that we have the possibility of being  
better. simply reflect on that.
h.h. the 14th dalai lama