45 lines
834 B
JavaScript
45 lines
834 B
JavaScript
import fs from "fs-extra";
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import fp from "lodash/fp.js";
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import _ from "lodash";
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import * as p1 from './part1.mjs';
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function completionString(line) {
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const stack = [];
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for ( const c of line ) {
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if( p1.closing[c] ) {
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stack.unshift(p1.closing[c]);
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} else {
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if(c !== stack.shift()) return;
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}
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}
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return stack;
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}
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export function linesScore(lines) {
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lines = lines.map( completionString ).filter(x=>x);
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const points = {
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')': 1,
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']': 2,
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'}': 3,
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'>': 4,
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}
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const lineScore = line => line.reduce( (a,b) => 5*a + points[b], 0 );
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return lines.map(lineScore);
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}
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export function solution(lines) {
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const scores =linesScore(lines);
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scores.sort( (a,b) => a<b?-1:1 );
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return scores[ (scores.length-1) / 2 ];
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}
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