From 4dcd8f01afe5800baa67bbdf72832afb0d627755 Mon Sep 17 00:00:00 2001
From: Frederick Cheung <frederick.cheung@gmail.com>
Date: Thu, 11 Dec 2008 15:19:03 +0000
Subject: Make delete_if/reject faster and fix other mutators

[#1559 state:committed]

Signed-off-by: Jeremy Kemper <jeremy@bitsweat.net>
---
 activesupport/lib/active_support/ordered_hash.rb | 37 +++++++++++++++---------
 1 file changed, 24 insertions(+), 13 deletions(-)

(limited to 'activesupport/lib/active_support/ordered_hash.rb')

diff --git a/activesupport/lib/active_support/ordered_hash.rb b/activesupport/lib/active_support/ordered_hash.rb
index fa68db5604..3def0be639 100644
--- a/activesupport/lib/active_support/ordered_hash.rb
+++ b/activesupport/lib/active_support/ordered_hash.rb
@@ -18,19 +18,13 @@ module ActiveSupport
       end
 
       def delete(key)
-        array_index = has_key?(key) && index(key)
-        if array_index
-          @keys.delete_at(array_index)
+        if has_key? key
+          index = @keys.index(key)
+          @keys.delete_at index
         end
         super
       end
 
-      def delete_if
-        super
-        sync_keys!
-        self
-      end
-
       def reject!
         super
         sync_keys!
@@ -41,9 +35,6 @@ module ActiveSupport
         dup.reject!(&block)
       end
 
-      alias_method :super_keys, :keys
-      private :super_keys
-
       def keys
         @keys
       end
@@ -68,10 +59,30 @@ module ActiveSupport
         keys.each {|key| yield [key, self[key]]}
       end
 
+      alias_method :each_pair, :each
+
+      def clear
+        super
+        @keys.clear
+        self
+      end
+
+      def shift
+        k = @keys.first
+        v = delete(k)
+        [k, v]
+      end
+
+      def merge(other_hash)
+        result = dup
+        other_hash.each {|k,v| result[k]=v}
+        result
+      end
+
       private
 
       def sync_keys!
-        (@keys - super_keys).each { |k| @keys.delete(k) }
+        @keys.delete_if {|k| !has_key?(k)}
       end
     end
   end
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