47 lines
833 B
JavaScript
47 lines
833 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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export const processInput = (file) => fs.readFile(file,'utf8').then(
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content => content.split("\n").filter(x=>x).map(
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line => line.split('')
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)
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);
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export const closing = {
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'{':'}',
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'<': ">",
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'(': ')',
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'[': ']',
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};
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function firstIllegalCharacter(line) {
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const stack = [];
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for ( const c of line ) {
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if( closing[c] ) {
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stack.push(closing[c]);
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} else {
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if(c !== stack.pop()) return c;
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}
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}
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return '';
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}
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export function solution(lines) {
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const points = {
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')': 3,
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']': 57,
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'}': 1197,
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'>': 25137,
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}
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return _.sum(
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lines.map( firstIllegalCharacter ).map(
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c => points[c] || 0
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)
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)
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}
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