enum.c: Enumerable#tally

* enum.c (enum_tally): new methods Enumerable#tally, which group
  and count elements of the collection.  [Feature #11076]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67020 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/test/ruby/test_enum.rb b/test/ruby/test_enum.rb
index c56e280e06..1029143db6 100644
--- a/test/ruby/test_enum.rb
+++ b/test/ruby/test_enum.rb
@@ -294,6 +294,11 @@ class TestEnumerable < Test::Unit::TestCase
     assert_equal(h, @obj.each_with_index.group_by(&cond))
   end
 
+  def test_tally
+    h = {1 => 2, 2 => 2, 3 => 1}
+    assert_equal(h, @obj.tally)
+  end
+
   def test_first
     assert_equal(1, @obj.first)
     assert_equal([1, 2, 3], @obj.first(3))