From: Tom Sawyer <transami@...>
Date: 2002-08-01T02:26:05+09:00
Subject: Re: matrix challange

funny you should ask. i just had to do that myself.

          aT = []
          a.length.times do |y|
            a[y].length.times do |x|
              aT[x] = [] unless aT[x]
              aT[x][y] = a[y][x]
            end
          end

the only thing somewhat annoying about this is having to specify aT[x] =
[]. wish ruby could just pick up on that when i try to use it as such.

~transami

On Wed, 2002-07-31 at 10:23, Daniel Bretoi wrote:
> 
> Hi all,
> 
> 	I'd like to see the various solutions for coming up with code to
> 	transpose a matrix. ie. make 
> 
> 	a = [[1,2],[1,3],[2,4]]
> 
> 	look like
> 
> 	aT = [[1,1,2],[2,3,4]]
> 
> 	I haven't had time to do a solution myself, but I think it would be
> 	interesting to see how some of you guys would tackle it while I
> 	derive something.
> 
> 	
> -- 
> "Then we typed the G, and the  system crashed"...
> 
-- 
~transami