toolkit/javascript/d3/src/time/weeks.js
author Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr>
Fri, 18 Apr 2014 14:31:58 +0200
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d3.time.weeks = d3_time_range(d3.time.week, function(date) {
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  date.setDate(date.getDate() + 7);
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}, function(date) {
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  return ~~((date - new Date(date.getFullYear(), 0, 1)) / 6048e5);
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});
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d3.time.weeks.utc = d3_time_range(d3.time.week.utc, function(date) {
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  date.setUTCDate(date.getUTCDate() + 7);
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}, function(date) {
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  return ~~((date - Date.UTC(date.getUTCFullYear(), 0, 1)) / 6048e5);
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});