make Hash#extract! more symmetric with Hash#slice

1 files changed, 3 insertions, 3 deletions

diff --git a/activesupport/lib/active_support/core_ext/hash/slice.rb b/activesupport/lib/active_support/core_ext/hash/slice.rb
index 45fec57009..de09f26f3d 100644
--- a/activesupport/lib/active_support/core_ext/hash/slice.rb
+++ b/activesupport/lib/active_support/core_ext/hash/slice.rb
@@ -32,9 +32,9 @@ class Hash
 
   # Removes and returns the key/value pairs matching the given keys.
   #
-  #   { a: 1, b: 2, c: 3, d: 4 }.extract!(:a, :b)
-  #   # => {:a => 1, :b => 2}
+  #   { a: 1, b: 2, c: 3, d: 4 }.extract!(:a, :b) # => { a: 1, b: 2 }
+  #   { a: 1, b: 2 }.extract!(:a, :x) # => { a: 1 }
   def extract!(*keys)
-    keys.each_with_object({}) { |key, result| result[key] = delete(key) }
+    keys.each_with_object(self.class.new) { |key, result| result[key] = delete(key) if has_key?(key) }
   end
 end