How filter and sort array by category and date using Lodash

Question

Hello to all I am new in this, I try sort and filter array of object using lodash, I don't know is the correct solution but I know is work, I have array some like this...

contactList =[    { 
      "ChatCount": 2, "chatid": 10000413, "createdon": "2018-10-25T13:49:50.9900000", "isArchive": 0, "isOnline": false ,
      "members":[{"id": "60259166", "lastseen": 15261867,"name": "la", "picture": "/la/5285871.250.jpg"}],
      "message": "",
      "message_cnt": 1,
      "messageid": 1,
      "newest_message": "2018-10-25T13:49:50.9900000",
      "oldest_message": "2018-10-25T13:49:50.9900000",
      "received_cnt": 0,
      "sentby": [{"id":59,"name":"betsynray","picture":"/betsynray/2884P1010025250.jpg","lastseen":1164}],
      "unread_cnt": 1
     },
     {
         "ChatCount": 2, "chatid": 61247987, "createdon": "2018-10-25T13:49:14.9170000", "isArchive": 0,"isOnline": true,
         "members":[{"id": 61247987, "lastseen": 15318187,"name": "li", "picture": "/li/4705502.250.jpg"}],
         "message": "good",
        "message_cnt": 2,
        "messageid": 2,
        "newest_message": "2018-10-31T10:20:29.5000000",
        "oldest_message": "2018-10-25T13:47:59.6700000",
        "received_cnt": 0,
        "sentby": [{"id":59,"name":"mm","picture":"/mm/2884P1010025250.jpg","lastseen":1164}],
        "unread_cnt": 3
     }

]

them I want to filter (sentBy.lastseen > 18000) and sort by most recent date using (newest_message) I have lodahs and when I try for example sort by date I'm using some like this...

contactList.sort(function (o) { return moment(o.NEWEST_MESSAGE).format('YYYYMMDD')}).reverse();

This working but now I try filter also by lastseen I try something like this using lodas and momentjs

 function any() {

   var status = _(contactList)
        .filter(function (a) { return a.MEMBERS[0].lastseen > 1800000 }) 
        .sort(function (o) { return moment(o.NEWEST_MESSAGE).format('YYYYMMDD')}).reverse() // sort names
        .value();
        return status;

}

the latseen filter is work well but no the sort by recent date, What am I doing wrong someone can help me? thank you very much in advance

Answer 1

can you try just to format it to a timestamp:

.sort(function (o) { return moment(o.newest_message).unix()})

And if I see it right you dont need to wrap contactList in a lodash function...

filter,sort and reverse are native array functions.

---

var status = contactList
        .filter(function (a) { return a.members[0].lastseen > 1800000 })
        .sort(function (o) { return moment(o.newest_message).unix() })
        .reverse();
return status;