keyword_arg_arity.rb

def address_method(city: "Bloomington", state: "IN", street: "123 fake st")
  print x,y,z,"\n"
end

input = {city: "Indianapolis", street: "321 faux st", zip: "12345"}

address_method(input_address) # => ArgumentError: unknown keyword: zip

addr_mthd = method(:address_method)
acceptable_keywords = addr_mthd.parameters.select{|p| p[0] == :key}.map(&:last)

accepted_input = input.select{|(k,v)| acceptable_keywords.include?(k)}

address_method(accepted_input) # => IndianapolisIN321 faux st