On Sat, 2011-07-23 at 06:37 -0700, Ting Lei wrote:
I know the Reverse Polish is not a couple of hundred years old. I have an impression of reading something about people writing natural deduction systems using only dots in place of parenthesis. And it is said that it was "natural" in those pre-historic times.
That's also why I had this (mis-)conception that ($) can be used to achieve something similar. It would be marginally interesting, since it saves us one character in the mental stack. I still remember looking at the parentheses in a lisp program.
Anyways, thanks for the clarifications.
Hmm. Maybe highlighting the parenthesis would help in more complicated expressions. I.e. the matching parenthesis are coloured in the same colour. For example (((()())())) rgbyyccbppgr r - red g - green b - blue c - black p - pink Regards