there's an off-by-one error in here somewhere

This commit is contained in:
2024-12-13 00:21:21 -05:00
parent 8eb121fb5e
commit c6b5605022
2 changed files with 54 additions and 0 deletions

50
09/index.ts Normal file
View File

@@ -0,0 +1,50 @@
import fs from "node:fs";
import { printTime, now, toNum } from "../util";
const test = true;
const data = fs.readFileSync(
test ? "./inputs/testinput" : "./inputs/input",
"utf8"
);
let timer = now.instant();
console.log(
"part one:",
data
.split("\n")
.slice(0, -1)[0]
.split("")
.map(toNum)
.reduce((disk, curr, index) => {
const fill = index % 2 === 0 ? index / 2 : -1; // -1 represents free space
return [...disk, ...Array.from({ length: curr }, () => fill)];
}, [] as Array<number>)
.reduce((disk, current, i, a) => {
console.log(disk, current, i, a);
if (current === -1) {
while (true) {
let tail = a.pop();
if (tail === -1 || tail === undefined) {
continue;
} else {
return [...disk, tail];
}
}
} else {
return [...disk, current];
}
}, [] as Array<number>)
.reduce((checksum, curr, i) => {
console.log(curr, i);
return checksum + curr * i;
}, 0),
printTime(now.instant().since(timer))
);
// timer = now.instant();
// console.log(
// "part two:",
// data.split("\n").slice(0, -1),
// printTime(now.instant().since(timer))
// );

View File

@@ -17,3 +17,7 @@ export const printTime = (duration: Temporal.Duration): string => {
return parts.join(", ");
};
export const toNum = (v: string) => {
return parseInt(v, 10);
};