From: Tim Pease <tim.pease@...>
Date: 2006-11-15T03:48:42+09:00
Subject: Re: Convert singel dimention array into grid

On 11/14/06, Giant Cranes <ruby-forum@gavinjoyce.com> wrote:
> Hi,
>
> I have been learning ruby for the past week and am completely hooked.
> Most of the code I am producing is elegant (ruby's credit), although I
> am having trouble elegantly converting a single dimension array with 16
> elements into a two-dimension grid [4x4].
>
> Here is what I have so far:
>
> @array = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16]
> @grid = Array.new
>
> i = 0
> index = 0
> 0.upto(3) do |i|
>   j = 0
>   0.upto(3) do |j|
>     @grid[i] = Array.new if j == 0
>     @grid[i][j] = @array[index]
>     index += 1
>     j += 1
>   end
>   i += 1
> end
>
> @grid
>

Let the golfing commence!

require 'enumerator'

@array = (1..16).to_a
@grid = Array.new(4) {|idx| Array.new(4)}

@array.each_with_index do |val, idx|
  @grid[idx/4][idx%4] = val
end


Blessings,
TwP