javascript - 查找日期范围内的工作日

Question

我正在尝试将日期推送到数组中的某个范围内，但它仅推送最后一个日期 n 次，而不是所需的单个日期。

function getBusinessDatesCount(startDatetest, endDatetest) {
    var curDate = startDatetest;
    var weekdays = [];
    while (curDate <= endDatetest) {
        var dayOfWeek = curDate.getDay();
        if (!((dayOfWeek === 6) || (dayOfWeek === 0))) {
            weekdays.push(curDate);
        }
        curDate.setDate(curDate.getDate() + 1);
    }
    console.log(weekdays);
}
var startDatetest = new Date('05/03/2016');
var endDatetest = new Date('05/10/2016');
var numOfDates = getBusinessDatesCount(startDatetest, endDatetest);

Answer 1

当前内存中只有两个 date 对象，startDatetest 和 endDatetest - 更改 curDate 将更改 startDatetest，因为对象变量本质上引用 Javascript 中的内存位置。 (创建引用该对象的新变量，例如 curDate = startDatetest，不会克隆该对象，它只会复制对内存中对象位置的引用)。您需要克隆date对象:

function getBusinessDatesCount(startDatetest, endDatetest) {
  var curDate = startDatetest;
  var weekdays = [];
  while (curDate <= endDatetest) {
    var dayOfWeek = curDate.getDay();
    if (!((dayOfWeek === 6) || (dayOfWeek === 0))) {
      weekdays.push(new Date(curDate.getTime()));
    }
    curDate.setDate(curDate.getDate() + 1);
  }
  console.log(weekdays);
}
var startDatetest = new Date('05/03/2016');
var endDatetest = new Date('05/10/2016');
var numOfDates = getBusinessDatesCount(startDatetest, endDatetest);