Introduce Array.wrap(foo) to wrap the argument in an array unless it's already an array. Wraps nil as an empty array. Use instead of Array(foo) and foo.to_a since they treat String as Enumerable.

1 files changed, 19 insertions, 0 deletions

diff --git a/activesupport/lib/active_support/core_ext/array/wrapper.rb b/activesupport/lib/active_support/core_ext/array/wrapper.rb
new file mode 100644
index 0000000000..12fd745b1a
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/array/wrapper.rb
@@ -0,0 +1,19 @@
+module ActiveSupport #:nodoc:
+  module CoreExtensions #:nodoc:
+    module Array #:nodoc:
+      module Wrapper
+        # Wraps the object in an Array unless it's an Array.
+        def wrap(object)
+          case object
+          when nil
+            []
+          when self
+            object
+          else
+            [object]
+          end
+        end
+      end
+    end
+  end
+end