On Day 8, we reverse a mapping of on/off signals to the 7-segment digits they represent.
This puzzle was fun, but challenging. We’re given a series of “words”, each of
which corresponds to a 7seg digit. It’s essentially a problem of figuring out a
logic mapping. Given, for example, af, we know that the digit must be 1
(the only digit with two lighted segments). We don’t know which segment is a
or which is f, though. There are four such unique-count digits, and we can
use this data to determine a mapping of segments.
This would’ve been a great way to use the 7seg implementation I built for 2022 Day 6, but alas, 12/5/2022 comes after 12/7/2021 according to most calendars.
Visualization
The visualization walks through each “display” in the mapping and visualizes the collapse down into known digit values.
New Features
No new features per se, but for today we created the glyph for the pipe |
characters. The split pipe harkens back to a common feature of monospace fonts
from my youth.
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