testing

metakoans-ryan/knowledge_for_koan_1_assert_1.rb

@@ -0,0 +1,45 @@
+class Class
+  def attribute(name)
+    define_method(name + "?") do
+      false
+    end
+  end
+end
+
+# class Module
+#   def attribute(params, &block)
+#     initial = nil
+#     if params.is_a?(Hash)
+#       name = params.keys[0]
+#       initial = params.values[0]
+#     else
+#       name = params
+#     end
+#     
+#     define_attribute_methods(name, initial, &block)
+#   end
+#   
+#   private
+#   
+#   def define_attribute_methods(name, initial_value, &block)
+#     define_method(name) do
+#       initial_value ||= instance_eval &block unless !block_given?
+#       
+#       instance_eval <<-code
+#       @#{name}_attr ||= initial_value unless @#{name}_attr_is_set
+#       @#{name}_attr
+#       code
+#     end
+#     define_method(name + '=') do |value| 
+#       instance_eval <<-code
+#       @#{name}_attr = value; 
+#       @#{name}_attr_is_set = true
+#       code
+#     end
+#     define_method(name + '?') do
+#       instance_eval <<-code
+#       !@#{name}_attr.nil?
+#       code
+#     end
+#   end
+# end