Extract options from a set of arguments. Removes and returns the last element in the array if it‘s a hash, otherwise returns a blank hash.

  def options(*args)
    args.extract_options!
  end

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

[Source]

# File lib/inactive_support/core_ext/array/extract_options.rb, line 13
        def extract_options!
          last.is_a?(::Hash) ? pop : {}
        end