enum.c: Enumerable#uniq

* enum.c (enum_uniq): new method Enumerable#uniq.
  [Feature #11090]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55709 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 15 insertions, 0 deletions

diff --git a/test/ruby/test_enum.rb b/test/ruby/test_enum.rb
index df75a80c50..d2403dd1a1 100644
--- a/test/ruby/test_enum.rb
+++ b/test/ruby/test_enum.rb
@@ -921,4 +921,19 @@ class TestEnumerable < Test::Unit::TestCase
     assert_int_equal(2, (2..2).sum)
     assert_int_equal(42, (2...2).sum(42))
   end
+
+  def test_uniq
+    src = [1, 1, 1, 1, 2, 2, 3, 4, 5, 6]
+    assert_equal([1, 2, 3, 4, 5, 6], src.uniq.to_a)
+    olimpics = {
+      1896 => 'Athens',
+      1900 => 'Paris',
+      1904 => 'Chikago',
+      1906 => 'Athens',
+      1908 => 'Rome',
+    }
+    assert_equal([[1896, "Athens"], [1900, "Paris"], [1904, "Chikago"], [1908, "Rome"]],
+                 olimpics.uniq{|k,v| v})
+    assert_equal([1, 2, 3, 4, 5, 10], (1..100).uniq{|x| (x**2) % 10 }.first(6))
+  end
 end