14 lines
395 B
JavaScript
14 lines
395 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 => 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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