Developer @Observable
SummaryAdvent of Code HelpersDay 1: Calorie CountingDay 2: Rock Paper ScissorsDay 4: Camp CleanupDay 5: Supply StacksDay 6: Tuning TroubleDay 7: No Space Left On DeviceDay 8: Treetop Tree HouseDay 9: Rope BridgeDay 10: Cathode-Ray TubeDay 11: Monkey in the MiddleDay 12: Hill Climbing AlgorithmDay 13: Distress SignalDay 14: Regolith Reservoir
Day 3: Rucksack Reorganization
parse = aoc.lines((l) => l.split(""))
letterValue = (c) => {
const v = c.charCodeAt(0);
if (v >= 97) return v - 97 + 1;
else return v - 65 + 27;
}
function part1(input) {
let values = input.map((d) => {
let half1 = d.slice(0, d.length / 2);
let half2 = new Set(d.slice(d.length / 2));
for (let l of half1) {
if (half2.has(l)) return letterValue(l);
}
return { half1, half2 };
throw new Error("no dupe found");
});
return d3.sum(values);
}
function part2(input) {
let badges = [];
for (let i = 0; i < input.length - 2; i += 3) {
let bag1 = input[i];
let bag2 = new Set(input[i + 1]);
let bag3 = new Set(input[i + 2]);
for (const l of bag1) {
if (bag2.has(l) && bag3.has(l)) {
badges.push(l);
break;
}
}
}
return d3.sum(badges, letterValue);
}
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
