9 lines
274 B
JavaScript
9 lines
274 B
JavaScript
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/**
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* getWeek function, return current week number from a `Date` object.
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*/
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getWeek = function (date) {
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var onejan = new Date(date.getFullYear(), 0, 1);
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return Math.ceil((((date - onejan) / 86400000)
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+ onejan.getDay()) / 7);
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};
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