1 files changed, 14 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/symbol/to_proc.rb b/activesupport/lib/active_support/core_ext/symbol/to_proc.rb
new file mode 100644
index 0000000000..520369452b
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/symbol/to_proc.rb
@@ -0,0 +1,14 @@
+class Symbol
+  # Turns the symbol into a simple proc, which is especially useful for enumerations. Examples:
+  #
+  #   # The same as people.collect { |p| p.name }
+  #   people.collect(&:name)
+  #
+  #   # The same as people.select { |p| p.manager? }.collect { |p| p.salary }
+  #   people.select(&:manager?).collect(&:salary)
+  #
+  # This is a builtin method in Ruby 1.8.7 and later.
+  def to_proc
+    Proc.new { |*args| args.shift.__send__(self, *args) }
+  end unless :to_proc.respond_to?(:to_proc)
+end