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Here is my solution for the Mexican Blanket Quiz.
It's also available here:
http://code.rendale.com/svn/RubyQuiz/MexicanBlanket_127/Mexican_Blanket.html<http://code.rendale.com/svn/RubyQuiz/MexicanBlanket>

I was having a hard time seeing the pattern in the ascii so I added a
feature to convert the ascii string into an html image composed of colored
divs.

The colors in the blanket are randomly selected from an array of possible
colors and gradients are alternately separated by Mexican flag bands and
black bands.  The technique I use is to create a string with enough of the
pattern to fill the entire blanket and then shift back by one unit per row.

Any feedback on how I can improve this code would be much appreciated.


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#!/usr/local/bin/ruby
module RubyQuiz

  #creates the pattern
  class Pattern
    attr_reader :colors
    attr_reader :value

    def initialize(length)
      @length  ength
      @color_count  :color1, :color2}
      @colors Hash["0","black","1","red","2","orange","3","yellow","4","green","5","blue","6","indigo","7","violet","8","white","9","grey"]

      @value
      @flag_switch  rue
      generate
    end

    def generate
      pick_new_colors
        (0..(@length.to_f/6).ceil).each do |i|
          @value + @color1.to_s * @color_count[:color1]) + (@color2.to_s *
@color_count[:color2])
        update_colors
        end
    end

    private
      def update_colors
        if @color_count[:color1] > 1
          @color_count[:color1]-          @color_count[:color2]+        else
          @color_count[:color1],@color_count[:color2]P1
          @flag_switch ? add_flag : add_seperator
          pick_new_colors
        end
      end

      def add_flag
        @value + 01840"
        @flag_switch  alse
      end

      def add_seperator
        @value + 000"
        @flag_switch  rue
      end

      def pick_new_colors
        @color1  rand*9).ceil
        @color2  color1 < 2 ? @color1 + 1 : @color1 - 1
      end
  end

  # composes the pattern into a blanket
  class Blanket
    attr_reader :ascii
    attr_accessor :scale
    def initialize(widthu,height0, scale 
      @width, @height, @scale  idth.to_i, height.to_i, scale.to_i
      @ascii, @html  "",""]
      @pattern  attern.new(@width+@height)
      weave
    end

    private
      def weave
        0.upto(@height) do |i|
          @ascii + @pattern.value[0 + i,@width])[0,@width] + "\n"
        end
        puts @ascii + "\n"
        puts "open Mexican_Blanket.html in your interweb browser to see it
in full color"
        html
      end

      def html
        @html  <html>\n<head>\n<title>Mexican Blanket
Solution</title>\n</head>\n"
        @html +body>\n"
        @html
+style>\nbody{background:#ccc;font-weight:bold;text-align:center}\ndiv.pixel{float:left;
width:#{@scale}px; height:#{@scale}px;}\n.wrapper{border:2px solid #fff;
width:#{@width*@scale}px; margin:auto;}\n</style>\n"
        @html +div classwrapper\">\n"
        @ascii.split("\n").each do |line|
          line.gsub (/(.)/) do |char|
            @html + <div classpixel\" style
background:#{@pattern.colors[char]}\"></div>"
          end
        end
        @html + \n<div styleclear:both\"></div>\n</div>"
        @html + \n<div><pre>\n#{@ascii}\n</pre></div>\n"
        @html + </body>\n</html>"
        to_file
      end

      def to_file
        output_file  ile.open("Mexican_Blanket.html","w")do |f|
          f.write(@html)
        end
      end
  end
end

# Blanket.new accepts height, width, and scale (used for html version)
if __FILE__ $0
  blanket  ubyQuiz::Blanket.new(*ARGV)
end

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