15 lines
393 B
JavaScript
15 lines
393 B
JavaScript
import * as R from "remeda";
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import { isLessThan } from "./part1";
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const dividers = [[[2]], [[6]]];
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export default R.createPipe(
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R.flatten,
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R.concat(dividers),
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(packets) => packets.sort(isLessThan),
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(packets) =>
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packets.map((p, i) => ({ i: i + 1, divider: dividers.includes(p) })),
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R.filter(({ divider }) => divider),
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R.map(R.prop("i")),
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(v) => v.reduce((a, b) => a * b)
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);
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