1 files changed, 39 insertions, 45 deletions
diff --git a/activesupport/lib/active_support/core_ext/hash/keys.rb b/activesupport/lib/active_support/core_ext/hash/keys.rb
index af9d372d76..ffaa69570f 100644
--- a/activesupport/lib/active_support/core_ext/hash/keys.rb
+++ b/activesupport/lib/active_support/core_ext/hash/keys.rb
@@ -1,52 +1,46 @@
-module ActiveSupport #:nodoc:
-  module CoreExtensions #:nodoc:
-    module Hash #:nodoc:
-      module Keys
-        # Return a new hash with all keys converted to strings.
-        def stringify_keys
-          inject({}) do |options, (key, value)|
-            options[key.to_s] = value
-            options
-          end
-        end
+class Hash
+  # Return a new hash with all keys converted to strings.
+  def stringify_keys
+    inject({}) do |options, (key, value)|
+      options[key.to_s] = value
+      options
+    end
+  end
 
-        # Destructively convert all keys to strings.
-        def stringify_keys!
-          keys.each do |key|
-            self[key.to_s] = delete(key)
-          end
-          self
-        end
+  # Destructively convert all keys to strings.
+  def stringify_keys!
+    keys.each do |key|
+      self[key.to_s] = delete(key)
+    end
+    self
+  end
 
-        # Return a new hash with all keys converted to symbols.
-        def symbolize_keys
-          inject({}) do |options, (key, value)|
-            options[(key.to_sym rescue key) || key] = value
-            options
-          end
-        end
+  # Return a new hash with all keys converted to symbols.
+  def symbolize_keys
+    inject({}) do |options, (key, value)|
+      options[(key.to_sym rescue key) || key] = value
+      options
+    end
+  end
 
-        # Destructively convert all keys to symbols.
-        def symbolize_keys!
-          self.replace(self.symbolize_keys)
-        end
+  # Destructively convert all keys to symbols.
+  def symbolize_keys!
+    self.replace(self.symbolize_keys)
+  end
 
-        alias_method :to_options,  :symbolize_keys
-        alias_method :to_options!, :symbolize_keys!
+  alias_method :to_options,  :symbolize_keys
+  alias_method :to_options!, :symbolize_keys!
 
-        # Validate all keys in a hash match *valid keys, raising ArgumentError on a mismatch.
-        # Note that keys are NOT treated indifferently, meaning if you use strings for keys but assert symbols
-        # as keys, this will fail.
-        #
-        # ==== Examples
-        #   { :name => "Rob", :years => "28" }.assert_valid_keys(:name, :age) # => raises "ArgumentError: Unknown key(s): years"
-        #   { :name => "Rob", :age => "28" }.assert_valid_keys("name", "age") # => raises "ArgumentError: Unknown key(s): name, age"
-        #   { :name => "Rob", :age => "28" }.assert_valid_keys(:name, :age) # => passes, raises nothing
-        def assert_valid_keys(*valid_keys)
-          unknown_keys = keys - [valid_keys].flatten
-          raise(ArgumentError, "Unknown key(s): #{unknown_keys.join(", ")}") unless unknown_keys.empty?
-        end
-      end
-    end
+  # Validate all keys in a hash match *valid keys, raising ArgumentError on a mismatch.
+  # Note that keys are NOT treated indifferently, meaning if you use strings for keys but assert symbols
+  # as keys, this will fail.
+  #
+  # ==== Examples
+  #   { :name => "Rob", :years => "28" }.assert_valid_keys(:name, :age) # => raises "ArgumentError: Unknown key(s): years"
+  #   { :name => "Rob", :age => "28" }.assert_valid_keys("name", "age") # => raises "ArgumentError: Unknown key(s): name, age"
+  #   { :name => "Rob", :age => "28" }.assert_valid_keys(:name, :age) # => passes, raises nothing
+  def assert_valid_keys(*valid_keys)
+    unknown_keys = keys - [valid_keys].flatten
+    raise(ArgumentError, "Unknown key(s): #{unknown_keys.join(", ")}") unless unknown_keys.empty?
   end
 end