imageblur.rb

class Image
  def initialize(array)
    @array = array
    @new_array = @array.map {|e| Array.new(e.size) }
  end

  def blur
    @array.each_with_index do |row,x|
      row.each_with_index do |cell,y| 
        last_x_pixel = row.size - 1
        last_y_pixel = @array.size - 1
          if @array[x][y] == 1 
            @new_array[x][y] ||= 1
            @new_array[x-1][y] = 1 if x != 0
            @new_array[x][y-1] = 1 if y != 0
            @new_array[x][y+1] = 1 if y != last_y_pixel
            @new_array[x+1][y] = 1 if x != last_x_pixel
          else
            @new_array[x][y] ||= @array[x][y]
          end 
      end
    end

    return Image.new(@new_array).output_image
  end

  def output_image
    @array.each do |i|
    puts i.join("")
    end
  end
end

image = Image.new([
        [0, 0, 0, 0],
        [0, 0, 1, 0],
        [0, 0, 0, 0],
        [1, 1, 0, 0]
      ])
image.blur