Inspired by this absolute legend.
Some one-line solutions for Advent of Code problems. I am not allowing myself to
use the walrus operator because that's unnatural :D
The files q14b.py and q16b.py are my actual solutions for Days 14 and 16.
These files read their puzzle input from q??_input.txt.
I have then adapted these in a number of stages:
The files q14_oneline.py q16_oneline.py are the first step on the road to
madness. In these I've replaced every def by a lambda already. They're not
technically one-liners yet but they're very close and they are a bit easier to
read.
The files q14_oneline_real.py and q16_oneline_real.py are (syntactically)
honest one-liners. Basically I've taken the previous files and rearranged them a
bit to make it a proper one-liner. There is still some whitespace, including
some newlines, but that is purely decorative and can be removed without issue.
The files q14_oneline_mangled.py and q16_oneline_mangled.py are just there
in case you want something really illegible to look at. I have replaced all the
variables with one-letter names and given them a cursory golf. Doubtless there
are more bytes to be shaved either by some clever tricks or a big rewrite. These
files read their input from stdin in the interest of saving a few bytes of
source code.
All my code works and gives the correct output when I run it with
PyPy 7.3.13 or CPython Python 3.11.6. The latter does give some syntax
warnings about q14_oneline_mangled.py, but it still executes.
PyPy takes about 0.4 seconds to run q14_oneline_mangled.py and
1.8 seconds to run q16_oneline_mangled.py. That's not so bad, given the
circumstances!