toISOString() changes datetime value

Question

I have array of the objects.Each object in array has date property.I try to get biggest(the last) date from array.

Here is array:

var sensorsData = [         


        

Answer 1

The problem lay in that this process (that makes date conversion to integers than back to dates) is not reversible the proof is in the following function that performs conversion from dates to int and then back to dates, only to get different values from the starting ones

irreversible conversion

My solution is pretty simple : comparing dates as are, and returning the result

function setDate(){
var sensorsData = [{Id:1,MeasureDate:"2017-08-20T09:52:32" },{Id:2,MeasureDate:"2017-08-20T09:54:35" },{Id:3,MeasureDate:"2017-08-20T09:56:13"}];

var lastDate = updateLatestDate(sensorsData);
console.log(lastDate.MeasureDate);


function compare(d1,d2){
if (d1.MeasureDate >d2.MeasureDate)
  return d1;
else
  return d2;
}

function updateLatestDate(sensorsData) {
      return ( sensorsData.reduce(compare) );
  }
}

update date