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Solution for AoC#2
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| const allReports = `` // For simplicity, I chose to keep the input here instead of accepting as CLI input | |
| const splitReports = allReports.split('\n') | |
| .filter(report => report.length) | |
| .map(report => report.split(' ').map(val => parseInt(val))) | |
| function isReportSafe(report) { | |
| const isIncreasing = report[0] < report[1]; | |
| return report.every((val, i) => { | |
| if (i === 0) return true; // skip initial position | |
| const diff = val - report[i - 1]; | |
| return isIncreasing ? diff >= 1 && diff <= 3 : diff >= -3 && diff <= -1; | |
| }); | |
| } | |
| const safeReports = splitReports.filter(isReportSafe) | |
| console.log(safeReports.length) | |
| // Solution is 411 |
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