1 files changed, 64 insertions, 0 deletions
diff --git a/ScotlandYard.rb b/ScotlandYard.rb
new file mode 100755
index 0000000..5bb91a2
--- /dev/null
+++ b/ScotlandYard.rb
@@ -0,0 +1,64 @@
+#!/usr/bin/ruby
+
+require 'yaml'
+
+class Game
+
+    def initialize
+        # load YAML
+        file = File.read 'yard.yml'
+        y = YAML.load file
+
+        @possible_locations = y['starting_locations']
+        @previous_locations = Array.new
+        @map = y['map']
+    end
+
+    def possible_locations turn = 0
+        locations = Hash.new 0
+        @possible_locations.each do |loc|
+            locations[loc] += 1
+        end
+
+        chances = locations.values.inject :+
+
+        locations.each { |location, chance| locations[location] = chance / chances.to_f }
+
+        locations
+    end
+
+    def remove possibility
+        @possible_locations.delete possibility
+    end
+
+    def at location
+        @possible_locations = [location]
+    end
+
+    def take method
+        new_locations = Array.new
+        @possible_locations.each do |loc|
+            unless @map[loc][method] == nil
+                new_locations += @map[loc][method]
+            end
+        end
+        @possible_locations = new_locations
+    end
+end
+
+def print_locations locations
+    puts 'Possible Locations:'
+    locations = locations.sort_by { |loc, prob| -prob }
+    locations.each { |loc, prob| printf "   %3d: %6.2f\%\n", loc, prob*100 }
+end
+
+g = Game.new
+start = 196
+g.at start
+print_locations g.possible_locations
+g.take 'taxi'
+g.take 'taxi'
+g.take 'taxi'
+g.take 'underground'
+g.take 'bus'
+print_locations g.possible_locations