在两个日期之间创建一个天数数组 [英] Create an array of days between two dates

问题描述

I have 2 dates: StartDate and EndDate

With the help of the following code, i am able to create an array of months between 2 dates. 

Result = [10/09/2018, 11/09/2018, 12/09/2018, 01/09/2019...08/09/2019]

How do i calculate the number of days in each of those months and then create an array. What i am trying to do is calculate the number of days between those months.(depending on number of days)

Oct-Nov - 30 days
Nov-Dec - 31 days
Dec- Jan - 30 days
.
.
.
July- Aug - 30 days 
and so forth (depending on number of days)
and then create an array from that.

array = [30,30,31,30,28....] 

I also have a function that calculates number of days in each month depending on leap year.
 
<pre lang="text"><pre lang="Javascript">

function isLeapYear(year) {
       return (((year % 4 === 0) && (year % 100 !== 0)) || (year % 400 === 0));
   }
   function getDaysInMonth(year, month) {
       return [31, (isLeapYear(year) ? 29 : 28), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31][month];
   }

我们将非常感谢任何帮助。谢谢。



我尝试了什么：

Any help will be greatly appreciated. Thank you.

What I have tried:

var getDateArray = function(start, end) {
        var arr = [];
        var dt0 = new Date(start);
        var endD = new Date(end);
        while (dt0 <= endD) {
            arr.push(new Date(dt0));
            dt0.setMonth(dt0.getMonth() + 1);
            }
        return arr;
    }
    
       

     var z = "10/09/2018"; var y = "08/08/2019"
     var dateArr = getDateArray(z, y);

推荐答案

怎么样这个？

How about this?

function getDateArray (start, end) {
        var arr = [];
        var startDate = new Date(start);
        var endDate = new Date(end);
        while (startDate <= endDate) {
            arr.push(new Date(startDate.setMonth(startDate.getMonth() + 1)));
            }
        return arr;
    }
    
function test  (){   

     var z = "2018-09-01"; var y = "2019-09-10"
     var dateArr = getDateArray(z, y);
     alert(dateArr[0] + "\n" + dateArr[1] + "\n" + dateArr[2]);
}

我将你的dt0和endD改为startDate和endDate。

同时循环有点容易，它似乎工作。



你可以看到它运行于：

JS Bin - 协作式JavaScript调试 [ ^ ]



弹出数组中的前三个日期以显示它的工作原理。

看起来像：

https://i.stack.imgur。 com / n2nn3.png [ ^ ]



之后我添加了daysBetween（）函数：

I changed your dt0 and endD to startDate and endDate.
Also the while loop is a bit easier and it seems to work.

You can see it run at:
JS Bin - Collaborative JavaScript Debugging[^]

It pops up the first three dates in the array to show it works.
Looks like:
https://i.stack.imgur.com/n2nn3.png[^]

After that I added the daysBetween() function:

function daysBetween ( date1, date2 ) 
{   
  var timeDiff = Math.abs(date2.getTime() - date1.getTime());
 return dayDifference = Math.ceil(timeDiff / (1000 * 3600 * 24)); 
 }

然后我在两个日期也调用了test（）方法。

Then I make the test() method call that too on two of the dates.

alert(daysBetween(dateArr[0], dateArr[3]))

在jsbin上尝试一下。



你会看到：

https://i.stack.imgur.com/awk1Q.png [ ^ ]



最终代码

Try it out at the jsbin.

You will see :
https://i.stack.imgur.com/awk1Q.png[^]

Final Code

function calculateFinalArray(dateArr){
  var dayCounts = "";
   for (var x = 0; x < dateArr.length-1;x++)
     {
       dayCounts += daysBetween(dateArr[x],dateArr[x+1]) + ":";
     }
  alert(dayCounts);
}

看起来像这样:(分号分隔列表，你可以改变）：

< a href =https://i.stack.imgur.com/tSm0H.png> https://i.stack.imgur.com/tSm0H.png [ ^ ]

您可以使用两个日期之间的差异除以一天中的毫秒数。从另一个中减去一个，您可以计算两者之间的天数，如下所示：

You can use the difference between the two dates divided by the number of milliseconds in a day. Subtracting one from the other you can calculate the number of days between the two as follows:

function myFunction() {
    var startValue = new Date(2018,9,9,0,0,0,0);
    var endValue = new Date(2018,10,9,0,0,0,0);
    var days = (endValue - startValue) / (1000 * 60 * 60 * 24);
}

请注意，月份的范围是0到11，而不是1到12.所以上面计算的是10月9日到10月9日之间的天数。 11月9日。

Note that the months are in the range 0 to 11, rather than 1 to 12. So the above calculates the number of days between 9th October and 9th November.

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