Reverse Polish Notation Calculator

I just wrote a Reverse Polish Notation calculator. It’s beautiful. Extending a Forth compiler with new words must be a dream.

The ease of parsing functions of higher arity is astonishing. As long as you know how many arguments a function expects, you can feed them in trivially by popping them off a stack. Variadic functions can be given lists of arguments since the calculator expects a fixed number of arguments for each function.

I wonder how RPN handles partial function application. Associativity seems to just become a cyclic shift, at least at first glance. I’m going to figure out distributivity and commutativity later today.

The lack of ambiguity and the corresponding lack of parentheses is nice.

I can see why some people are addicted to using RPN calculators.

Related Posts

How to change tabs to spaces

Another Way to Write Conditional Probability

Notes for May 9, 2019

A tool to look at random images


e-ink reminisces

Edwin Edwards

Middle School by Bo Burnham

How to Disable Disqus Ads on your Blog

Derivation of Reservoir Sampling