0.to_string() / 5 map([1, 2, 3], lambda n: n * 2).some_field_that_doesnt_exist A type checker would find both mistakes very easily, by only using the informat

0.to_string() / 5 map([1, 2, 3], lambda n: n * 2).some_field_that_doesnt_exist A type checker would find both mistakes very easily, by only using the information from the standard library.