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
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