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24 lines
586 B
JavaScript
24 lines
586 B
JavaScript
4 years ago
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const { readInput, sum } = require("./util");
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const { paragraphs } = readInput();
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function intersect(strA, strB) {
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const setB = new Set(strB);
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return strA
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.split("")
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.filter((el) => setB.has(el))
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.join("");
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}
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function intersections(...strings) {
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let res = strings[0];
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for (const cur of strings.slice(1)) {
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res = intersect(res, cur);
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}
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return res;
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}
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console.log("Part1:");
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console.log(sum(paragraphs.map((p) => new Set(p.replaceAll("\n", "")).size)));
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console.log("Part2:");
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console.log(sum(paragraphs.map((p) => intersections(...p.split("\n")).length)));
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