标题几乎是这样说的,我的剧本是从几个星期前的一个日期以来不是会计年度,并且返回一个不好的价值?
var today = new Date();
var timestamp = new Date($(this).attr('timestamp') * 1000);
Date.prototype.getWeeks = function()
{
var jan = new Date(this.getFullYear(), 0, 1);
var now = new Date(this.getFullYear(),this.getMonth(),this.getDate());
var doy = ((now - jan + 1) / 86400000);
return Math.ceil(doy / 7)
};
console.log('Today: ' + today); // Date {Thu Oct 31 2013 09:21:19 GMT-0700 (PDT)}
console.log('PastT: ' + timestamp); // Date {Fri Nov 20 2009 17:00:00 GMT-0800 (PST)}
console.log('Today: ' + today.getWeeks()); // 44 <-- Should be zero
console.log('PastT: ' + timestamp.getWeeks()); // 47 <-- Not accounting for the Years
console.log('Since: ' + (today.getWeeks() - timestamp.getWeeks())); // time ago = -3
答案 0 :(得分:2)
您可以比较日期,然后将差异(以毫秒为单位)转换为周数:
function dateDiffInWeeks(a,b) {
var _MS_PER_WEEK = 1000 * 60 * 60 * 24 * 7;
var utc1 = Date.UTC(a.getFullYear(), a.getMonth(), a.getDate());
var utc2 = Date.UTC(b.getFullYear(), b.getMonth(), b.getDate());
return Math.floor((utc2 - utc1) / _MS_PER_WEEK);
}
var today = new Date();
var anotherDay = new Date("Fri Nov 20 2009");
alert(dateDiffInWeeks(today,anotherDay));
披露:这很重要基于this SO answer。