Break up misc Object extensions

1 files changed, 42 insertions, 0 deletions

diff --git a/activesupport/lib/active_support/core_ext/object/returning.rb b/activesupport/lib/active_support/core_ext/object/returning.rb
new file mode 100644
index 0000000000..0dc2e1266a
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/object/returning.rb
@@ -0,0 +1,42 @@
+class Object
+  # Returns +value+ after yielding +value+ to the block. This simplifies the
+  # process of constructing an object, performing work on the object, and then
+  # returning the object from a method. It is a Ruby-ized realization of the K
+  # combinator, courtesy of Mikael Brockman.
+  #
+  # ==== Examples
+  #
+  #  # Without returning
+  #  def foo
+  #    values = []
+  #    values << "bar"
+  #    values << "baz"
+  #    return values
+  #  end
+  #
+  #  foo # => ['bar', 'baz']
+  #
+  #  # returning with a local variable
+  #  def foo
+  #    returning values = [] do
+  #      values << 'bar'
+  #      values << 'baz'
+  #    end
+  #  end
+  #
+  #  foo # => ['bar', 'baz']
+  #
+  #  # returning with a block argument
+  #  def foo
+  #    returning [] do |values|
+  #      values << 'bar'
+  #      values << 'baz'
+  #    end
+  #  end
+  #
+  #  foo # => ['bar', 'baz']
+  def returning(value)
+    yield(value)
+    value
+  end
+end