Refactoring: more generic semantics + don't pollute global namespace.

lib/every.rb

@@ -1,17 +1,19 @@
-class Every
-  instance_methods.each { |m| undef_method(m) unless m.match(/^__/) }
-  def initialize(enum)
-    @enum = enum
-  end
-  def method_missing(method, *args, &block)
-    @enum.map {|o| o.__send__(method, *args, &block) }
+module Enumerable
+  class Proxy
+    instance_methods.each { |m| undef_method(m) unless m.match(/^__/) }
+    def initialize(enum, method=:map)
+      @enum, @method = enum, method
+    end
+    def method_missing(method, *args, &block)
+      @enum.__send__(@method) {|o| o.__send__(method, *args, &block) }
+    end
   end
 end
 
 module Enumerable
   def every(&block)
     block_given? ?
-      Every.new(self).instance_eval(&block) :
-      Every.new(self)
+      Proxy.new(self).instance_eval(&block) :
+      Proxy.new(self)
   end
 end

test/test_every.rb

@@ -8,7 +8,7 @@ class EveryTest < Test::Unit::TestCase
   context "Every" do
     test "is a basic object" do
       whitelist = %w( __id__ __send__ method_missing )
-      Every.instance_methods.to_set.should be(whitelist.to_set)
+      Enumerable::Proxy.instance_methods.to_set.should be(whitelist.to_set)
     end
     test "passes message onto enumerable's items" do
       [1.4, 2.4, 3.4].every.floor.should be([1,2,3])