From: Christopher Dicely <cmdicely@...>
Date: 2008-02-17T03:20:13+09:00
Subject: Re: Iterate through array twice

With Ruby 1.9:

def find_square_sides(horiz_segments)
  squares = Array.new
  horiz_segments.combination(2) do |side, candidate|
    if (...whatever...)
      squares << Square.new(side, candidate)
    end
  end
end

On Feb 16, 2008 6:49 AM, Ruhe <nocturneer@gmail.com> wrote:
> I have array of horizontal segments and I need to find which of them
> may be sides of a box, so I implemented this method:
>
> def find_square_sides(horiz_segments)
>   squares = Array.new
>   horiz_segments.each_with_index do |side, i|
>     horiz_segments[(i+1)..(horiz_segments.size - 1)].each do |
> condidate|
>       if(## here goes long-long check ##)
>         squares << Square.new(side, condidate)
>       end
>     end
>   end
>   squares
> end
>
>
> Knowing the beauty of Ruby, I hope that there is a better solution. I
> guess that double iterating isn't the best.
>
>