JS: Problems with the order of a Dates array

Question

Hello!

I’m having trouble in Javascript with the order of an array. Basically, I take a list of objects and sort it according to one of its attributes which is a Date. But when I give a console.log, when used in a function or when placed in a . txt, different results appear and the array is partially ordered.

Specifying:

1 - I sort the array as follows:

commands.sort(compareDate)

function compareDate (command1, command2) {
  if (command1.date.getTime() < command2.date.getTime()) {
    return -1
  }
  if (command1.date.getTime() > command2.date.getTime()) {
    return 1
  }
  return 0
}

Then if I print it by console.log, everything seems orderly (attention in the schedules):

[ { date: 2019-06-02T16:26:50.000Z, button: 'NET_VOLUMEUP' },
  { date: 2019-06-02T16:26:51.000Z, button: 'NET_VOLUMEUP' },
  { date: 2019-06-02T16:26:52.000Z, button: 'NET_VOLUMEDOWN' },
  { date: 2019-06-02T16:26:54.000Z, button: 'NET_VOLUMEUP' },
  { date: 2019-06-02T16:26:56.000Z, button: 'NET_VOLUMEDOWN' },
  { date: 2019-06-02T16:26:57.000Z, button: 'NET_VOLUMEDOWN' },
  { date: 2019-06-02T16:26:59.000Z, button: 'NET_VOLUMEUP' },
...

Then I wanted to put it all in a . txt, so I did:

for (let i = 0; i < commands.length; i++) {
  write(commands[i].date + ',' + commands[i].button)
}

function write (text) {
  fs.appendFile('logs/parsed.txt', text + '\r\n', function (err) {
    if (err) {
      return console.log(err)
    }
  })
}

What generates me a result already out of order (attention in the schedules and ignore the zone):

Sun Jun 02 2019 13:26:52 GMT-0300 (GMT-03:00),NET_VOLUMEDOWN
Sun Jun 02 2019 13:26:51 GMT-0300 (GMT-03:00),NET_VOLUMEUP
Sun Jun 02 2019 13:26:54 GMT-0300 (GMT-03:00),NET_VOLUMEUP
Sun Jun 02 2019 13:26:57 GMT-0300 (GMT-03:00),NET_VOLUMEDOWN
Sun Jun 02 2019 13:26:56 GMT-0300 (GMT-03:00),NET_VOLUMEDOWN
Sun Jun 02 2019 13:26:59 GMT-0300 (GMT-03:00),NET_VOLUMEUP
Sun Jun 02 2019 13:27:00 GMT-0300 (GMT-03:00),NET_VOLUMEUP
Sun Jun 02 2019 13:27:00 GMT-0300 (GMT-03:00),NET_VOLUMEDOWN
Sun Jun 02 2019 13:27:01 GMT-0300 (GMT-03:00),NET_VOLUMEUP
Sun Jun 02 2019 13:27:01 GMT-0300 (GMT-03:00),NET_VOLUMEDOWN
Sun Jun 02 2019 13:27:02 GMT-0300 (GMT-03:00),NET_VOLUMEUP
Sun Jun 02 2019 13:27:03 GMT-0300 (GMT-03:00),NET_VOLUMEDOWN
Sun Jun 02 2019 13:27:03 GMT-0300 (GMT-03:00),NET_VOLUMEUP
Sun Jun 02 2019 13:26:50 GMT-0300 (GMT-03:00),NET_VOLUMEUP
Sun Jun 02 2019 15:39:24 GMT-0300 (GMT-03:00),SAM_CENTER
Sun Jun 02 2019 15:38:12 GMT-0300 (GMT-03:00),SAM_POWER
Sun Jun 02 2019 15:38:12 GMT-0300 (GMT-03:00),SAM_POWER

I tried to use too date.toString(), date.toUTCString() and date.toLocaleString(), which also generated results out of order. Worse than that, the results do not seem to follow a pattern. Now the second object that is out of order, now the third object, and so it goes.

I’ve considered the fact that this could be a function problem fs.appendFile, but the problem is when I traverse this array into another function and consume its objects, they also appear with some out-of-order indexes, undermining the functioning of my code.

Any ideas? Any help?