18 lines
598 B
JavaScript
18 lines
598 B
JavaScript
// https://www.codewars.com/kata/56eb16655250549e4b0013f4/javascript
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function mostFrequentDays(year) {
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const weekdays = ['Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'];
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const ds = new Date(year, 0, 1, 0, 0, 0, 0);
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const de1 = new Date(year, 0, 365, 0, 0, 0, 0);
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const de2 = new Date(year, 0, 366, 0, 0, 0, 0);
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const de = de2.getFullYear() === year ? de2 : de1;
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const freq = [];
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for (let i = ds.getDay();1; ++i) {
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freq.push((i+6)%7);
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if (i % 7 === de.getDay()) {
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break;
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}
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}
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return freq.sort((a, b) => a-b).map(w => weekdays[w]);
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}
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