如何将日期组件数组转换为JavaScript日期对象？

Question

So I have an API endpoint returning dates to me as an array, like this:

{
  date: [
    '2016',
    '4',
    '2',
    '10',
    '3',
    '23'
  ]
}

What's the easiest / tersest way to turn this into a date object, so that I can sort objects? The lack of leading zeros and presence of minutes & hours makes me think it is quite difficult?

Answer 1

使用new Date()并修正月份（从零开始）。

 new Date(year, month[, day[, hour[, minutes[, seconds[, milliseconds]]]]]); 

var date = new Date(object.date[0], object.date[1] - 1, object.date[2], object.date[3], object.date[4], object.date[5]);

Answer 2

You're asking for the easiest way. Then here you are.

 var obj = { date: [ '2016', '4', '2', '10', '3', '23' ] }; --obj.date[1]; console.log(new Date(...obj.date)); 

From the MDN article of Date , the month argument is an Integer value representing the month, beginning with 0 for January to 11 for December . This means you need to reduce the actual month's value by 1.

This solution also uses spread operators .

Answer 3

If your array is fixed you can use the following

 var dt={ date: [ '2016', '4', '2', '10', '3', '23' ] }; //assuming first component is YYYY, second is MM, third is DD then HH:MM:SS alert(new Date(dt.date[0]+"-"+((dt.date[1] - 1) < 10 ? "0" + (dt.date[1]-1) : (dt.date[1]-1))+"-"+ (dt.date[2] < 10 ? "0" + dt.date[2] : dt.date[2]) + "T" + (dt.date[3] < 10 ? "0" + dt.date[3] : dt.date[3]) + ":" + (dt.date[4] < 10 ? "0"+dt.date[4] :dt.date[4]) +":" + (dt.date[5] < 10 ? "0"+dt.date[5] :dt.date[5]))) 

Answer 4

Extended solution for sorting an array of "dates"(after converting) using Date.getTime and Array.sort functions:

 var dates = [ { date: [ '2016','4','2','10','3','23'] }, { date: [ '2016','4','1','10','3','23'] }, { date: [ '2016','4','3','11','3','23'] } ]; dates.sort(function(a,b){ // compound date string in form: "2016,4,2 10:3:23" to pass into Date constructor var aDate_str = a.date.slice(0,3).join() + " " + a.date.slice(3).join(":"), bDate_str = b.date.slice(0,3).join() + " " + b.date.slice(3).join(":"), aTime = (new Date(aDate_str)).getTime(), // getting date as the number of milliseconds bTime = (new Date(bDate_str)).getTime(); return (aTime == bTime)? 0 : ((aTime < bTime)? -1 : 1); }); document.write("<pre>" + JSON.stringify(dates, 0, 4) + "</pre>");