ActiveSupport::OrderedHash[1,2,3,4] creates an OrderedHash instead of a Hash.

[#2615 state:committed]

Signed-off-by: Jeremy Kemper <jeremy@bitsweat.net>

activesupport/lib/active_support/ordered_hash.rb

@@ -10,6 +10,16 @@ module ActiveSupport
         @keys = []
       end
 
+      def self.[](*args)
+        ordered_hash = new
+        args.each_with_index { |val,ind|
+          # Only every second value is a key.
+          next if ind % 2 != 0
+          ordered_hash[val] = args[ind + 1]
+        }
+        ordered_hash
+      end
+
       def initialize_copy(other)
         super
         # make a deep copy of keys

activesupport/test/ordered_hash_test.rb

@@ -162,4 +162,10 @@ class OrderedHashTest < Test::Unit::TestCase
   def test_inspect
     assert @ordered_hash.inspect.include?(@hash.inspect)
   end
+
+  def test_alternate_initialization
+    alternate = ActiveSupport::OrderedHash[1,2,3,4]
+    assert_kind_of ActiveSupport::OrderedHash, alternate
+    assert_equal [1, 3], alternate.keys
+  end
 end