Module day02

Rock Paper Scissors

With so few combinations it’s possible to precompute the values for each scenario by hand then quickly look them up for each game.

Functions

parse

Map each line from one of the 9 possible combinations (“A”, “B” or “C” followed by “X”, “Y” or “Z”) to between 0 and 8 inclusive.

part1

Map each index to a score using a small precomputed lookup table.

part2

Map each index to a (different) score using a second small precomputed lookup table.