Tinkering with code and algorithms for fun
Day 1 - Report RepairDay 2 - Password PhilosophyDay 3 - Toboggan TrajectoryDay 4 - Passport ProcessingDay 5 - Binary BoardingDay 6 - Custom CustomsDay 7: Handy HaversacksDay 8 - Handheld HaltingDay 9 - Encoding ErrorDay 10 - Adapter ArrayDay 11 - Seating SystemDay 12 - Rain RiskDay 14 - Docking DataDay 15 - Rambunctious RecitationDay 16 - Ticket TranslationDay 17 - Conway CubesDay 18 - Operation OrderDay 19 - Monster Messages (part one)
Day 13 - Shuttle Search
testInput = ({ earliest: 939, ids: [7, 13, 59, 31, 19] })
function q1(input) {
const { earliest, ids } = input;
let minDep = Infinity;
let minId = NaN;
for (const id of ids) {
// skip x
if (Number.isNaN(id)) continue;
const nextDeparture = Math.ceil(earliest / id) * id;
if (nextDeparture < minDep) {
minDep = nextDeparture;
minId = id;
}
}
return {
minDep,
minId,
answer: (minDep - earliest) * minId
};
}
test1 = q1(testInput)
answer1 = q1(input)
function* q2(input) {
let { ids, expected } = input;
if (!expected) expected = undefined;
/*
We basically need to find t such that
t % ids[i].val === ids[i].offset
.. for all i.
*/
// Filter out unimportant ids
ids = ids
.map((val, offset) => ({
val: Number.isNaN(val) ? 0 : BigInt(val),
offset: BigInt(offset)
}))
.filter(({ val, offset }) => val);
let { val: v1, offset: o1 } = ids[0];
let n1 = v1;
let steps = [{ v1, n1 }];
for (let i = 1; i < ids.length; i++) {
let { val: v2, offset: o2 } = ids[i];
let n2 = 0n;
while ((n1 + o2) % v2 !== 0n) {
n1 += v1;
yield { n1, v1, o1, n2, v2, o2 };
}
steps.push({ n1, v1, n2, v2, o2 });
yield steps;
v1 = v1 * v2;
}
yield { steps, answer: n1, expected };
}
testInputs2.map(q2)[4]
q2(input)
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.