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Solve D06P02
+62
+62
day06/part2.ts
+62
day06/part2.ts
···
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import { readFileSync } from "fs";
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let input = readFileSync("./input.txt", "utf8").split(/\n/);
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const operatorIndices = [...input[input.length - 1].matchAll(/\*|\+/g)].map(
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(match) => match.index
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);
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const tokenizedInput = input.map((line) => {
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const output = [];
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for (let i = 0; i < operatorIndices.length; i++) {
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output.push(
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line.slice(
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operatorIndices[i],
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i + 1 < operatorIndices.length
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? operatorIndices[i + 1]
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: line.length
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)
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);
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}
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return output;
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});
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const mathProblems = new Array(tokenizedInput[0].length)
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.fill(null)
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.map((n) => [] as any);
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for (let i = 0; i < tokenizedInput.length; i++) {
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for (let j = 0; j < tokenizedInput[i].length; j++) {
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mathProblems[j].push(tokenizedInput[i][j]);
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}
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}
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let answersSum = 0;
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for (let mathProblem of mathProblems) {
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const mp = new Array(mathProblem[0].length)
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.fill(null)
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.map(() => [] as string[]);
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for (let i = 0; i < mathProblem.length - 1; i++) {
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for (let j = 0; j < mathProblem[i].length; j++) {
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mp[j].push(mathProblem[i][j] ? mathProblem[i][j] : "");
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}
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}
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mathProblem = {
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operands: mp
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.map((tokens) => tokens.join("").trim())
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.filter(Boolean)
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.map(Number),
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operator: mathProblem[mathProblem.length - 1].trim()
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};
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answersSum +=
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mathProblem.operator === "+"
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? mathProblem.operands.reduce((a: any, c: any) => a + c, 0)
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: mathProblem.operands.reduce((a: number, c: number) => a * c, 1);
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}
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console.log(answersSum);