JavaScript Object Sorting By Date

Question

I am trying to sort my array of objects which have date values by date newest first and newest last.

I have the following code:

function comp(a, b) {
  return new Date(a.jsDate) - new Date(b.jsDate);
}

function compNewestFirst(a, b) {
  return new Date(b.jsDate) - new Date(a.jsDate);
}

Please note JS Date is a valid date/format the new Date() accepts.

I can getting it ordering oldest first but not newest first and I have tried the following:

return new Date(b.jsDate) + new Date(a.jsDate);

Current I CANNOT sort by newest date first and it only works OLDEST first.

Thanks

How do I sort newest first rather than oldest first – Lemex Mar 02 '15 at 14:11 — Lemex, Mar 02 '15 at 14:11

nanndoj · Answer 1 · 2015-03-02T14:27:17.193

1

Try it:

function compNewestFirst(a, b) {
  return new Date(b.jsDate).getTime() - new Date(a.jsDate).getTime();
}

The return will be a negative integer and you will be able to order.

Here is a FIDDLE;

edited Mar 02 '15 at 14:27

answered Mar 02 '15 at 14:13

nanndoj

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why use `getTime()` ? – Hacketo Mar 02 '15 at 14:17
@Hacketo You are right. Don't need to use `getTime()` because the subtraction will already return the result in milliseconds – nanndoj Mar 02 '15 at 14:31

JavaScript Object Sorting By Date

1 Answers1