From: Justin To <tekmc@...>
Date: 2008-06-28T07:23:15+09:00
Subject: Two Dimensional Array

class Tda

  def initialize(width=0, height=0)
    if((width==0) && width<height)
      raise NotImplementedError,
      "\(#{width}\) width Tda cannot have a height."
    else
      @tda = Array.new(width).map!{ Array.new(height) }
    end
  end

  def width?
    return @tda.size
  end

  def height?
    if(width?>0)
      return @tda[0].size
    else
      return nil
    end
  end

  #--Returns the dimensional size (x x y) as a string
  def size
    w=@tda.size

    if(width?>0)
      h = @tda[0].size
    else
      h = 0
    end

    return "#{w}x#{h}"
  end

  #--Returns true if both Tda's have equal widths and heights
  def eql_size?(tda)
    bool=false

    lh=size.split('x')
    rh=tda.size.split('x')

    if(lh[0]==rh[0])
      bool=true
    end

    if(lh[1]==rh[1])
      bool=true
    else
      bool=false
    end

    return bool
  end

end

This is what I've got so far, but I can't seem to figure out how to
write methods for: copying a Tda to another Tda, and indexing the Tda.
Thanks for the help!
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