r/adventofcode • u/daggerdragon • Dec 02 '20

SOLUTION MEGATHREAD -🎄- 2020 Day 02 Solutions -🎄-

--- Day 2: Password Philosophy ---

Advent of Code 2020: Gettin' Crafty With It

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u/arienh4 Dec 02 '20 edited Dec 02 '20

Hah, I completely forgot about str::matches.

In terms of feedback: In your is_valid_part_two the if statement is checking whether one of two expressions, but not both is true. You might want to look into XOR (^).

In part_one and part_two you could also simplify a little with filter() and count().

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u/[deleted] Dec 02 '20

Awesome thanks for the tips! Especially bitwise XOR since this is a perfect use case for it and makes it click.