44 lines
1.0 KiB
JavaScript
44 lines
1.0 KiB
JavaScript
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const fs = require("fs");
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// PART 1
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{
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const result = fs.readFileSync("day_1.txt")
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.toString()
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.split("\n")
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.map(line => line.split("").find(isFinite) + line.split("").findLast(isFinite))
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.map(Number)
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.filter(isFinite)
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.reduce((acc, val) => acc + val, 0);
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console.log(result);
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}
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// PART 2
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const digits = ["one", "two", "three", "four", "five", "six", "seven", "eight", "nine"];
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function isNumber(char, i, arr) {
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return isFinite(char) || digits.some(digit => arr.slice(i).join("").startsWith(digit));
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}
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function getNumber(line, index) {
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if (isFinite(line.charAt(index)))
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return line.charAt(index);
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for (let i = 0; i < digits.length; i++)
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if (line.slice(index).startsWith(digits[i])) return (i + 1).toString();
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}
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{
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const result = fs.readFileSync("day_1.txt")
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.toString()
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.split("\n")
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.map(line => getNumber(line, line.split("").findIndex(isNumber)) + getNumber(line, line.split("").findLastIndex(isNumber)))
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.map(Number)
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.filter(isFinite)
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.reduce((acc, val) => acc + val, 0);
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console.log(result);
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}
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