Other more "obscure" options also come to mind: Emacs Lisp, Smalltalk, etc. Wasn't there also something in Plan 9's GUI like this? The whole saving to a file fi

Other more "obscure" options also come to mind: Emacs Lisp, Smalltalk, etc. Wasn't there also something in Plan 9's GUI like this? The whole saving to a file first thing is just a convention, and one that got me thinking: it's a convention for a reason (reproducibility), and this argument ("why can't I just run it without saving first?"), seems kind of contrary to the whole point of the post. Disks are fast! Saving a file first is ridiculously fast in this day and age. Just bind a keystroke to save and run in one button press. It speaks more to lousy development environments than anything else if you can't make this a one button press operation.