> Traditional languages don't let you do [...] Because the parse would expect something to come after that last comma. Which languages are you referring to? Al

> Traditional languages don't let you do [...] Because the parse would expect something to come after that last comma. Which languages are you referring to? Almost every language I'm aware of allows trailing commas. C, C++, Java, Python, C#, Javascript (somewhat), Ruby, Objective-C, Perl, PHP, Elixir, Rust, and Go all allow trailing commas.