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

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module ActiveSupport #:nodoc:

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  module CoreExtensions #:nodoc:

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    module Array #:nodoc:

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      module ExtractOptions

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        # Extracts options from a set of arguments. Removes and returns the last

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        # element in the array if it's a hash, otherwise returns a blank hash.

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        #

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        #   def options(*args)

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        #     args.extract_options!

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        #   end

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        #

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        #   options(1, 2)           # => {}

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        #   options(1, 2, :a => :b) # => {:a=>:b}

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        def extract_options!

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          last.is_a?(::Hash) ? pop : {}

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        end

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      end

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    end

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  end

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end

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