Merge pull request #591 from kachick/implement-enumerable-each_with_o…

…bject

Implement Enumerable#each_with_object

AUTHORS.rst

@@ -22,3 +22,4 @@ Authors
 * Robin Schreiber
 * Jan Stępień
 * Jeremy Thurgood
+* Kenichi Kamiya

lib-topaz/enumerable.rb

@@ -53,6 +53,14 @@ def each_with_index(&block)
     end
   end
 
+  def each_with_object(memo, &block)
+    return self.enum_for(:each_with_object, memo) unless block
+    self.each do |elm|
+      yield elm, memo
+    end
+    memo
+  end
+
   def all?(&block)
     self.each do |obj|
       return false unless (block ? block.call(obj) : obj)

spec/tags/core/enumerable/each_with_object_tags.txt

@@ -1,3 +1 @@
-fails:Enumerable#each_with_object passes each element and its argument to the block
-fails:Enumerable#each_with_object returns an enumerator if no block
 fails:Enumerable#each_with_object gathers whole arrays as elements when each yields multiple