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artisonian/leapyear.js

Created January 10, 2013 19:39
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leapyear.js
function isLeapYear (n) { return (n % 400 === 0) || ((n % 4 === 0) && (n % 100 !== 0)); }
isLeapYear(1999); // => false
isLeapYear(2000); // => true
isLeapYear(2011); // => false
isLeapYear(2012); // => true
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