Incidentally I wrote a simple CLI RPN calc in half an hour recently: https://github.com/alexander-b/clac https://github.com/alexander-b/clac I was planning on

Incidentally I wrote a simple CLI RPN calc in half an hour recently: https://github.com/alexander-b/clac https://github.com/alexander-b/clac I was planning on adding a REPL-mode to it today for fun, and then someone linked me this post, saying "this could have been clac!", hehe.