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-rw-r--r--activesupport/lib/active_support/core_ext/array/access.rb14
-rw-r--r--activesupport/test/core_ext/array/access_test.rb2
2 files changed, 16 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/array/access.rb b/activesupport/lib/active_support/core_ext/array/access.rb
index 3177d8498e..e413acddc5 100644
--- a/activesupport/lib/active_support/core_ext/array/access.rb
+++ b/activesupport/lib/active_support/core_ext/array/access.rb
@@ -73,4 +73,18 @@ class Array
def forty_two
self[41]
end
+
+ # Equal to <tt>self[-3]</tt>.
+ #
+ # %w( a b c d e ).antepenultimate # => "c"
+ def antepenultimate
+ self[-3]
+ end
+
+ # Equal to <tt>self[-2]</tt>.
+ #
+ # %w( a b c d e ).penultimate # => "d"
+ def penultimate
+ self[-2]
+ end
end
diff --git a/activesupport/test/core_ext/array/access_test.rb b/activesupport/test/core_ext/array/access_test.rb
index 3f1e0c4cb4..d7a3fb56c2 100644
--- a/activesupport/test/core_ext/array/access_test.rb
+++ b/activesupport/test/core_ext/array/access_test.rb
@@ -26,6 +26,8 @@ class AccessTest < ActiveSupport::TestCase
assert_equal array[3], array.fourth
assert_equal array[4], array.fifth
assert_equal array[41], array.forty_two
+ assert_equal array[-3], array.antepenultimate
+ assert_equal array[-2], array.penultimate
end
def test_without