[Jprogramming] unwind protect

Common lisp's UNWIND-PROTECT operator: an idea worth stealing. It is a way of associating some 'cleanup sentence' with a 'protected sentence', such that the former always runs prior to exiting the latter, regardless of its status. If the protected sentence throws an error, it is propagated, un

[Jprogramming] 904-beta-c

J904-beta-c is available for windows/linux/macos. If you already run J904-beta, then upgrade is easy: load'pacman' 'upgrade'jpkg'jengine' If you have not yet installed J904-beta, time to get started! https://code.jsoftware.com/wiki/System/Installation/J904