Method: Grid#map_a

Defined in:
lib/cem/cruzzles.rb

#map_a(&block) ⇒ Object

Maps each cell of the grid by the given block.

If block has…

- one parameter, passes the cell value
- two parameters, passes the coordinates as a Point2D and the cell value
- three parameteres, passes y, x and the cell value

If the block returns nil, the original value is kept.



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# File 'lib/cem/cruzzles.rb', line 525

def map_a(&block)

  case block.arity
    when 1 
      @data.map { |row| row.map { |value| block.call(value) || value } }
    when 2 
      @data.each_with_index.map { |row, y| row.each_with_index.map { |value, x| block.call(Point2D.new(x, y), value) || value } }
    when 3      
      @data.each_with_index.map { |row, y| row.each_with_index.map { |value, x| block.call(y, x, value) || value} }
    else
      raise
  end

end