I just completed "Laboratories" - Day 7 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/7
Part 2 definitely caused a rethink - no use trying to trace everything, need to switch to a constant space algorithm. Final result is pretty!
Part 2 definitely caused a rethink - no use trying to trace everything, need to switch to a constant space algorithm. Final result is pretty!
December 7, 2025 at 8:35 PM
I just completed "Laboratories" - Day 7 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/7
Part 2 definitely caused a rethink - no use trying to trace everything, need to switch to a constant space algorithm. Final result is pretty!
Part 2 definitely caused a rethink - no use trying to trace everything, need to switch to a constant space algorithm. Final result is pretty!
The whole solution for part 2 runs in ~3ms on my M1 Pro, including the time to merge ranges. With only 190 ranges, 94 after merging, why worry? ~12k comparisons. Computers are fast! #deliberatelyquadratic
![Screenshot of implementation of consolidating the ranges in Advent of Code 2025, day 5, part 2. Full code follows:
consolidateRanges() {
for (let i = 0; i < this.freshRanges.length; i++) {
for (let j = i + 1; j < this.freshRanges.length; j++) {
let range = this.freshRanges[i];
let other = this.freshRanges[j];
if (range.intersects(other)) {
let newRange = range.merge(other);
this.freshRanges[i] = newRange;
i--; // backtrack to start over with new i
this.freshRanges.splice(j, 1); // throw out j
break;
}
}
}
}](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:z3shbffrvygb6ktyfer7glmv/bafkreiamjrswldqt7ljzqlqehb2rp2kr7vmbth2sa54lm6j6vh2hsker2q@jpeg)
December 5, 2025 at 3:56 PM
The whole solution for part 2 runs in ~3ms on my M1 Pro, including the time to merge ranges. With only 190 ranges, 94 after merging, why worry? ~12k comparisons. Computers are fast! #deliberatelyquadratic
I've completed "Printing Department" - Day 4 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/4
Staying on brand, here's a visualization of part 2:
Staying on brand, here's a visualization of part 2:
December 5, 2025 at 1:45 AM
I've completed "Printing Department" - Day 4 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/4
Staying on brand, here's a visualization of part 2:
Staying on brand, here's a visualization of part 2:
Day 3 of #AdventOfCode in the bag, first time I've put the examples into assertions to make sure I don't regress. Satisfying end with a tidy solution for parts 1 and 2 today. adventofcode.com/2025/day/3
December 3, 2025 at 3:42 PM
Day 3 of #AdventOfCode in the bag, first time I've put the examples into assertions to make sure I don't regress. Satisfying end with a tidy solution for parts 1 and 2 today. adventofcode.com/2025/day/3
Literally pick your poison, e-commerce edition
December 2, 2025 at 12:07 AM
Literally pick your poison, e-commerce edition
