36 lines
813 B
JavaScript
36 lines
813 B
JavaScript
import { readFile } from "fs/promises";
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function legalValues(a, b, gap) {
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const delta = Math.abs(a - b);
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console.log(`legaValues(${a}, ${b}, ${gap}){delta=${delta}} = ${delta <= gap}`);
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return delta <= gap;
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};
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if (process.argv.length <= 2) {
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console.error(`Needs more args >:(`).
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process.exit(1);
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}
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const fileToRead = process.argv[2];
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const file = await readFile(fileToRead, `utf-8`);
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let validLines = 0;
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for (const line of file.split(`\n`)) {
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// console.log(line)
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const ints = line.split(` `)
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.map(v => Number.parseInt(v));
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const isSafe = ints
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.slice(0, -1)
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.map((v, i) => v - ints[i + 1])
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.every((v, _, a) => Math.sign(v) === Math.sign(a[0]) && Math.abs(v) <= 3);
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// console.log(isSafe)
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if(isSafe) {
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validLines++;
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};
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// break
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};
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console.log(`Number of valid reports:`, validLines)
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