I'll just point out that this is originally from Scheme (I think... Maybe Scheme got it from a previous Lisp) but borrowed by Ruby. Neither Scheme nor Ruby do a

I'll just point out that this is originally from Scheme (I think... Maybe Scheme got it from a previous Lisp) but borrowed by Ruby. Neither Scheme nor Ruby do a perfect job with sticking to the naming convention, at least if we include popular libraries, but it is very handy and intuitive. https://stackoverflow.com/a/612588 https://stackoverflow.com/a/612588