From 9958950f78638e4a6c6800404d84f22effc0748e Mon Sep 17 00:00:00 2001
From: chaitanyav <me@chaitanyavellanki.com>
Date: Sat, 26 Jun 2010 01:52:20 -0700
Subject: Add OrderedHash#invert to preserve order in ruby 1.8 [#4875]
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Signed-off-by: José Valim <jose.valim@gmail.com>
---
 activesupport/lib/active_support/ordered_hash.rb | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'activesupport/lib/active_support')

diff --git a/activesupport/lib/active_support/ordered_hash.rb b/activesupport/lib/active_support/ordered_hash.rb
index a19d6c3532..6b563b9063 100644
--- a/activesupport/lib/active_support/ordered_hash.rb
+++ b/activesupport/lib/active_support/ordered_hash.rb
@@ -162,6 +162,10 @@ module ActiveSupport
         self
       end
 
+      def invert
+        OrderedHash[self.to_a.map!{|key_value_pair| key_value_pair.reverse}]
+      end
+
       def inspect
         "#<OrderedHash #{super}>"
       end
-- 
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