Question

我有条件使用javascript在开始结束日期之间每6个月拆分一次。请考虑以下示例

开课日期：11/08/2018（mm / dd / yyyy）截止日期：01/20/2020

需要跟随分手

lineSpacingExtra

请告知

Answer 1

希望这有助于http://plnkr.co/edit/hgEyiLyrX3Lfa7NJTeaL：

  var startDate = moment('11/08/2018');
  var endDate = moment('01/20/2020');


  function splitHalfYear(startDate, endDate) {
    var startMonth = startDate.month();
    var currentDate = moment(startDate);
    var returner = [];
    if (startMonth < 6) {
      currentDate = currentDate.startOf('year').add('month', 6);
    }
    else {
      currentDate = currentDate.startOf('year').add('year', 1);
    }

    returner.push({from: startDate, to: moment(currentDate).subtract('second', 1)});

    while(currentDate <= endDate) {
      var from = moment(currentDate);
      currentDate = currentDate.add('month', 6);

      if (currentDate.isAfter(endDate)) {
        returner.push({from: from, to: endDate});
      }
      else {
        returner.push({from: from, to: moment(currentDate).subtract('second', 1)});
      }
    }

    return returner;
  }


  var dates = splitHalfYear(startDate, endDate);
  dates.forEach(function(interval) {
    document.write(interval.from.format() +' - ');
    document.write(interval.to.format() + '<br>');
  })

Answer 2

您可以轻松完成momentjs，如下所示：

var beforeSixMonths = moment().subtract(6,'months');
var today = moment();

// and use like below for your other needs
var afterSixMonths = moment().add(6,'months');

有关详细信息，请参阅docs

Answer 3

这是一个迭代Date的简单代码段。然后，您可以添加所需的代码：

var start = "11/08/2018";
var end = "01/20/2020";

var sd = new Date(start); //sd from starting date
var ed = new Date(end); //ed from end date

var months_interval = 6;
console.log("----------");
while(true){
    if(sd>ed){ //if adding 6 months is higher than end date.
        console.log("from: "+sd);
        console.log("to: "+ed);
        break;
    }else{
        console.log("from: "+sd);
        sd.setMonth(sd.getMonth()+months_interval); //add 6 months
        console.log("to: "+sd);
    }
}

http://jsfiddle.net/2ma714sb/

希望有所帮助：）

编辑：如果你想要递归，这是另一个代码：

var start = "11/08/2018";
var end = "01/20/2020";

var sd = new Date(start); //sd from starting date
var ed = new Date(end); //ed from end date

var months_interval = 6;
console.log("----------");
iterate(sd,ed);

function iterate(sd,ed){
    if(sd>ed){
        console.log("FROM: "+sd+" TO: "+ed);
        return;
    }else{
        var new_sd = new Date(sd)
        new_sd.setMonth(new_sd.getMonth()+months_interval);
        console.log("FROM: "+sd+" TO: "+new_sd);
        iterate(new_sd,ed);
    }
}

http://jsfiddle.net/2ma714sb/1/

查找日期javascript之间的所有6个月开始和结束日期

3 个答案: