math & informatics teacher
function parse(input) {
return input.split("\n").map((line) => line.split(/\s+/).map(Number));
}
function next(ns) {
const diffs = ns.slice(1).map((n, i) => n - ns[i]); // Find consecutive differences
if (diffs.every((d) => d === diffs[0])) {
return ns[ns.length - 1] + diffs[0]; // Differences constant
}
return ns[ns.length - 1] + next(diffs); // Differences not constant, so recurse
}
function part1(input) {
return AOC.sum(parse(puzzleInput).map(next));
}
function part2(input) {
return AOC.sum(parse(puzzleInput).map((ns) => next(ns.reverse())));
}
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.
