How to find max and min value of date object in jquery?

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JavaScript

Hii friends,

I have used following code to find min and max value of date from an array of date using Jquery.

var Dates[

C#

Date {Wed Jun 08 2016 00:00:00 GMT+0530 (India Standard Time)}, Date {Thu Jun 09 2016 00:00:00 GMT+0530 (India Standard Time)}, Date {Fri Jun 10 2016 00:00:00 GMT+0530 (India Standard Time)}

];
var minDate;
mindate = new Date(Math.min.apply(null, dates));

But it returns invalid Date.

please help.

What I have tried:

var Dates[

C#

Date {Wed Jun 08 2016 00:00:00 GMT+0530 (India Standard Time)}, Date {Thu Jun 09 2016 00:00:00 GMT+0530 (India Standard Time)}, Date {Fri Jun 10 2016 00:00:00 GMT+0530 (India Standard Time)}

];
var minDate;
mindate = new Date(Math.min.apply(null, dates));

Posted 6-Jun-16 17:50pm

Aysha Patel

Updated 6-Jun-16 18:46pm

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Sergey Alexandrovich Kryukov 7-Jun-16 0:35am

The code you show is not JavaScript code. I don't know what is it.
What's the problem? First, you need to have an array. Traverse it in a for loop, get each element by index,
compare with current min and max...
—SA

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Karthik_Mahalingam · Answer 1 · 2016-06-06T18:36:00

convert the Json array into a date array and then apply the Math.min.apply function

example:

JavaScript

var date1 = new Date();
       date1.setDate(date1.getDate() + 1);
       var date2 = new Date();
       date2.setDate(date2.getDate() + 2);
       var date3 = new Date();
       date3.setDate(date3.getDate() + 3);
       var date4 = new Date();
       date4.setDate(date4.getDate() - 5);
       var _Dates = [{ date: date1 }, { date: date2 }, { date: date3 }, { date: date4 }];


      // adding the values from json array into a date array.
       var dateArray = [];
       for (var i = 0; i < _Dates.length; i++) {
           dateArray.push(_Dates[i].date);
       }
       var minDate = new Date(Math.min.apply(null, dateArray));

Sergey Alexandrovich Kryukov · Answer 2 · 2016-06-06T18:46:00

Please see my comment to the question. Even the formulation of the problem should be written in JavaScript. For example:

JavaScript

var points = [
   new Date(2016, 0),
   new Date(2018, 1),
   new Date(1999, 1),
   new Date(302, 0)];

Please see: Date — JavaScript.

How to compare the points of time? You simply can use the fact the the operators '<' and '>' are defined for the Date objects.

The function to calculate both minimum and maximum can, for example, return a stricture with the properties min and max:

JavaScript

function getMinMaxTime(points) {
    if (!points) return undefined;
    if (!points.length) return undefined; // not array
    if (points.length < 0) return null;
    var min = points[0];
    var max = points[0];
    for (var index in points) {
        if (points[index] > max) max = points[index];
        if (points[index] < min) min = points[index];
    }
    return { min: min, max: max };	
}

The return for pathological cases when there is no array or the object passed as the argument is not an array or there are no points are just for example. You may decide to do no check-ups, and then deal with possible exceptions, which is also would be a sound decision.

—SA

How to find max and min value of date object in jquery?

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