64 lines
1.6 KiB
TypeScript
64 lines
1.6 KiB
TypeScript
const sample = await Deno.readTextFile("sample.txt");
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const sample2 = await Deno.readTextFile("sample2.txt");
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const input = await Deno.readTextFile("input.txt");
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const wordsToNumbers: Record<string, number> = {
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one: 1,
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two: 2,
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three: 3,
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four: 4,
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five: 5,
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six: 6,
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seven: 7,
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eight: 8,
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nine: 9,
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};
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const getNumberStringsFromString = (data: string): string[] =>
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data.match(/(\d)/g) ?? [];
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const getNumberStringsAndNumberWordsFromString = (data: string): string[] =>
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Array.from(
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data.matchAll(
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new RegExp(`(?=(\\d|${Object.keys(wordsToNumbers).join("|")}))`, "gi"),
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),
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(x) => x[1],
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);
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const replaceWordNumbersToNumbers = (data: string): string =>
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data.replace(
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new RegExp(Object.keys(wordsToNumbers).join("|"), "gi"),
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(match) => String(wordsToNumbers[match]),
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);
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const solvePart1 = (data: string): number =>
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data
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.split("\n")
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.filter(Boolean)
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.map(getNumberStringsFromString)
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.map((numbers) => [
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numbers[0],
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numbers[numbers.length - 1],
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])
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.map(([a, b]) => parseFloat(a + b))
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.reduce((s, v) => s + v);
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console.log("Sample:", solvePart1(sample)); // 142
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console.log("Input", solvePart1(input)); // 55090
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const solvePart2 = (data: string): number =>
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data
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.split("\n")
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.filter(Boolean)
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.map(getNumberStringsAndNumberWordsFromString)
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.map((numbers) => numbers.map(replaceWordNumbersToNumbers))
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.map((numbers) => [
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numbers[0],
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numbers[numbers.length - 1],
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])
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.map(([a, b]) => parseFloat(a + b))
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.reduce((s, v) => s + v);
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console.log("Sample2:", solvePart2(sample2)); //281
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console.log("Input", solvePart2(input)); //54845
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