vendor/rails/activesupport/lib/active_support/core_ext/array/extract_options.rb

   1 module ActiveSupport #:nodoc:
   2   module CoreExtensions #:nodoc:
   3     module Array #:nodoc:
   4       module ExtractOptions
   5         # Extracts options from a set of arguments. Removes and returns the last
   6         # element in the array if it's a hash, otherwise returns a blank hash.
   7         #
   8         #   def options(*args)
   9         #     args.extract_options!
  10         #   end
  11         #
  12         #   options(1, 2)           # => {}
  13         #   options(1, 2, :a => :b) # => {:a=>:b}
  14         def extract_options!
  15           last.is_a?(::Hash) ? pop : {}
  16         end
  17       end
  18     end
  19   end
  20 end