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. On 19 July 2011 09:51, Maciej Marcin Piechotka <[email protected]> wrote: > On Tue, 2011-07-19 at 07:11 +0000, Ivan Lazar Miljenovic wrote: >> The only thing that I can think of that matches this is Reverse Polish >> Notation, and according to Wikipedia was about 90 years ago, not >> hundreds ;-) >> > > I may be wrong but weren't the RPN calculator slightly later then 90 > years ago? In any case according to wikipedia RPN was proposed in 1954 > so less then 60 years ago. (PN on the other hand was found around 90 > years ago). You're right; I mis-read the wikipedia article whilst skimming it. -- Ivan Lazar Miljenovic [email protected] IvanMiljenovic.wordpress.com
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