75 lines
2.1 KiB
JavaScript
75 lines
2.1 KiB
JavaScript
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const fs = require('fs');
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function extractDigits(line) {
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// Mapping of digit words to their numeric values
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const digitMap = {
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zero: 0, one: 1, two: 2, three: 3, four: 4,
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five: 5, six: 6, seven: 7, eight: 8, nine: 9
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};
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// Add single digit mappings
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for (let i = 0; i <= 9; i++) {
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digitMap[i.toString()] = i;
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}
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let digitsFound = [];
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let i = 0;
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while (i < line.length) {
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let matched = false;
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for (const [word, digit] of Object.entries(digitMap)) {
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if (line.startsWith(word, i)) {
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digitsFound.push(digit);
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i += word.length - 1; // Advance the index
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matched = true;
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break;
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}
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}
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i++; // Move to the next character if no match
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}
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return digitsFound;
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}
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function extractCalibrationValue(line) {
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const digits = extractDigits(line);
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if (digits.length > 0) {
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return parseInt(`${digits[0]}${digits[digits.length - 1]}`, 10);
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}
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return 0;
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}
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function calculateTotalCalibrationValue(filePath) {
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const lines = fs.readFileSync(filePath, 'utf-8').split('\n');
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return lines.reduce((sum, line) => sum + extractCalibrationValue(line), 0);
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}
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// Run the test
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function test() {
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console.warn("Starting Tests")
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const testLines = [
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"two1nine",
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"eightwothree",
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"abcone2threexyz",
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"xtwone3four",
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"4nineeightseven2",
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"zoneight234",
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"7pqrstsixteen"
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];
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const expectedResults = [29, 83, 13, 24, 42, 14, 76];
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testLines.forEach((line, index) => {
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const result = extractCalibrationValue(line);
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console.assert(result === expectedResults[index], `Error in line '${line}': Expected ${expectedResults[index]}, got ${result}`);
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console.log(`Line: '${line}', Calibration Value: ${result}`);
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});
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console.log("Finished Tests\n")
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}
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// Run the test function for verification
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test();
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// Calculate and print the total calibration value
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const totalValue = calculateTotalCalibrationValue('../input.txt');
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console.log(`Total Calibration Value from input.txt: ${totalValue}`);
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