From: ahoward <ahoward@...>
Date: 2002-11-10T09:23:21+09:00
Subject: Re: Multi-dimensional (like 2) arrays in Ruby

On Sun, 10 Nov 2002, Pit Capitain wrote:

[snip]
P> Please see the other posts to this thread for ways to improve the
P> code.

whoops!  my bad.  here's a fix

class Array
  def Array.Array dims, default=nil
    dim = dims.shift
    if dims.size == 0
      return Array.new dim, default
    else
      a = Array.new dim
      a.collect!{ Array.Array dims.clone, default }
    end
  end
end

if $0 == __FILE__
  m = Array.Array [3,2,1], 0
  p m			    # >> [[[0], [0]], [[0], [0]], [[0], [0]]]
  m[0][0][0] = 42
  m[1][0]    = [42]
  m[2]       = [[42],[0]]
  p m			    # >> [[[42], [0]], [[42], [0]], [[42], [0]]]
end

note that this works with dims.size == n

-a

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