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rrwo
on Oct 31, 2022
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Ask HN: What piece of code/codebase blew your mind...
A lot of code from The Art of Prolog that used some form of accumulator data structure as a third argument to predicates.
Jtsummers
on Nov 1, 2022
[–]
Do you mean something like how you might define `append/3`
append([], L, L). append([H|T], L2, [H|L3]) :- append(T, L2, L3).
Such that the computation can be run in any direction? Where it will produce the result of appending two lists, or the prefixes and suffixes of a list if the result (third parameter) is known, and so on?
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