1 files changed, 24 insertions, 4 deletions
diff --git a/activesupport/lib/active_support/core_ext/enumerable.rb b/activesupport/lib/active_support/core_ext/enumerable.rb
index d87d63f287..4675c41936 100644
--- a/activesupport/lib/active_support/core_ext/enumerable.rb
+++ b/activesupport/lib/active_support/core_ext/enumerable.rb
@@ -97,23 +97,43 @@ module Enumerable
     end
   end
 
+  # Returns a new array that includes the passed elements.
+  #
+  #   [ 1, 2, 3 ].including(4, 5)
+  #   # => [ 1, 2, 3, 4, 5 ]
+  #
+  #   ["David", "Rafael"].including %w[ Aaron Todd ]
+  #   # => ["David", "Rafael", "Aaron", "Todd"]
+  def including(*elements)
+    to_a.including(*elements)
+  end
+
   # The negative of the <tt>Enumerable#include?</tt>. Returns +true+ if the
   # collection does not include the object.
   def exclude?(object)
     !include?(object)
   end
 
-  # Returns a copy of the enumerable without the specified elements.
+  # Returns a copy of the enumerable excluding the specified elements.
+  #
+  #   ["David", "Rafael", "Aaron", "Todd"].excluding "Aaron", "Todd"
+  #   # => ["David", "Rafael"]
   #
-  #   ["David", "Rafael", "Aaron", "Todd"].without "Aaron", "Todd"
+  #   ["David", "Rafael", "Aaron", "Todd"].excluding %w[ Aaron Todd ]
   #   # => ["David", "Rafael"]
   #
-  #   {foo: 1, bar: 2, baz: 3}.without :bar
+  #   {foo: 1, bar: 2, baz: 3}.excluding :bar
   #   # => {foo: 1, baz: 3}
-  def without(*elements)
+  def excluding(*elements)
+    elements.flatten!(1)
     reject { |element| elements.include?(element) }
   end
 
+  # Alias for #excluding.
+  def without(*elements)
+    excluding(*elements)
+  end
+
   # Convert an enumerable to an array based on the given key.
   #
   #   [{ name: "David" }, { name: "Rafael" }, { name: "Aaron" }].pluck(:name)