this post was submitted on 01 Dec 2023
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The official awful.systems Advent of Code 2023 thread (awful.systems)
submitted 9 months ago* (last edited 9 months ago) by [email protected] to c/[email protected]
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Rules: no spoilers.

The other rules are made up as we go along.

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[–] [email protected] 4 points 9 months ago

How about not fiddling with indices?

JQ Notfiddlingwithindexificationhttps://github.com/zogwarg/advent-of-code/blob/main/2023/jq/14-a.jq

#!/usr/bin/env jq -n -R -f

# Dish to grid
[ inputs / "" ]

# Tilt UP
| transpose                       # Transpose, for easier RE use
| map(                            #
  ("#" + add) | [                 # For each column,   replace '^' with '#'
    scan("#[O.]*") | [            # From '#' get empty spaces and 'O' rocks
      "#", scan("O"), scan("\\.") # Let gravity do it's work.
    ]                             #
  ] | add[1:]                     # Add groups back together
 )                                #
| transpose                       # Transpose back

# For each row, count  'O'  rocks
| map(add | [scan("O")] | length)

# Add total load on "N" beam
| [0] + reverse | to_entries
| map( .key * .value ) | add

Similarly tired with index fiddling, I was pretty happy with my approach, which led to satisfying transpose cancelling in part 2. Not the fastest code out there, but it works. Day 14 was actually my favorite one so far ^^.