Keyword arguments on Ruby 2.0

gistfile1.rb

# Ruby 2.0.0 is needed for the following code to work

def foo value, **keywords
  puts [value,keywords].inspect
end

foo("somthing") #This works
foo("somthing", key: 'value') #This also works

foo(Hash.new(something: 'else')) #This raises 'ArgumentError: wrong number of arguments (0 for 1)'



class MyDirectory < Hash; end

foo(MyDirectory.new(something: 'else')) #This also raises 'ArgumentError: wrong number of arguments (0 for 1)'