How to filter different keys in a array and get unique result in angular js

Question

I'm trying to filter data from the response and remove duplicate items and push the data into an array, my api response goes as below:

{
   "_id":"0",
   "yacht_id":"200",
   "promo_id":"300",
   "blocked_thru":"promotions",
   "dates":"2017-08-23T00:00:00.000Z",
},
{
  "_id":"1",
  "booking_id":{
        "_id":"100",
        "booking_id":"BK163041494",
               },
  "blocked_thru":"booked",
  "dates":"2017-08-30T00:00:00.000Z",
 },
 {
   "_id":"2",
   "booking_id":{
        "_id":"100",
        "booking_id":"BK163041494",
                 },
    "blocked_thru":"booked",
    "dates":"2017-08-30T00:00:00.000Z",
 }

From the above response, if "booking_id" exist in object and "booking_id._id" is same then, I need to filter and push only unique objects to array.

I need a response as below:

{
   "_id":"0",
   "yacht_id":"200",
   "promo_id":"300",
   "blocked_thru":"promotions",
   "dates":"2017-08-23T00:00:00.000Z",
},
{
  "_id":"1",
  "booking_id":{
        "_id":"100",
        "booking_id":"BK163041494",
               },
  "blocked_thru":"booked",
  "dates":"2017-08-30T00:00:00.000Z",
 },

Any Help would be Appreciated. Thanks.

What have you done so far ? Add your code please not only your JSON — Lotus91
– Lotus91, Commented Aug 11, 2017 at 13:32
If you want a simple solution you could go with: _.uniqWith(objects, _.isEqual); lodash.com/docs/#uniqWith — enf0rcer
– enf0rcer, Commented Aug 11, 2017 at 13:32

Hassan Imam · Accepted Answer · 2017-08-11 14:24:55Z

1

You can use array#reduce and array#some

var response =[{"_id":"0","yacht_id":"200","promo_id":"300","blocked_thru":"promotions","dates":"2017-08-23T00:00:00.000Z",},{"_id":"1","booking_id":{"_id":"100","booking_id":"BK163041494",},"blocked_thru":"booked","dates":"2017-08-30T00:00:00.000Z",},{"_id":"2","booking_id":{"_id":"100","booking_id":"BK163041494",},"blocked_thru":"booked","dates":"2017-08-30T00:00:00.000Z",}];

var unique = response.reduce((res, obj) => {
  let isFound = res.some(o =>
    o['booking_id'] && o['booking_id']['_id'] === obj['booking_id']['_id'] );
  if(!isFound) {
    res.push(obj);
  }
  return res;
}, []);

console.log(unique);

answered Aug 11, 2017 at 14:24

Hassan Imam

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Comments

kukkuz · Accepted Answer · 2017-08-11 13:46:26Z

Use Array.prototype.reduce and a hashtable to pick out the unique elements - see demo below:

var object=[{"_id":"0","yacht_id":"200","promo_id":"300","blocked_thru":"promotions","dates":"2017-08-23T00:00:00.000Z",},{"_id":"1","booking_id":{"_id":"100","booking_id":"BK163041494",},"blocked_thru":"booked","dates":"2017-08-30T00:00:00.000Z",},{"_id":"2","booking_id":{"_id":"100","booking_id":"BK163041494",},"blocked_thru":"booked","dates":"2017-08-30T00:00:00.000Z",}];

var result = object.reduce(function(hash){
    return function(p, c) {
      if(!c.booking_id || (c.booking_id && !hash[c.booking_id.booking_id])) {
        if(c.booking_id)
          hash[c.booking_id.booking_id] = true;
        p.push(c);
      }
      return p;
    };
}(Object.create(null)),[]);
console.log(result);

.as-console-wrapper{top:0;max-height:100%!important;}

Alberto Trindade Tavares · Accepted Answer · 2017-08-11 13:51:39Z

1

You can use an object as a map to hold only one object per booking_id._id for those which have such field:

var objs=[{_id:"0",yacht_id:"200",promo_id:"300",blocked_thru:"promotions",dates:"2017-08-23T00:00:00.000Z"},{_id:"1",booking_id:{_id:"100",booking_id:"BK163041494"},blocked_thru:"booked",dates:"2017-08-30T00:00:00.000Z"},{_id:"2",booking_id:{_id:"100",booking_id:"BK163041494"},blocked_thru:"booked",dates:"2017-08-30T00:00:00.000Z"}];

var uniqueObjs = [];
var bookingObjsMap = {};

objs.forEach((obj) => {
  if (obj.booking_id) {
     bookingObjsMap[obj.booking_id._id]= obj;
  }
  else {
     uniqueObjs.push(obj);
  }
});

uniqueObjs = uniqueObjs.concat(Object.values(bookingObjsMap));
console.log(uniqueObjs);

edited Aug 11, 2017 at 13:51

answered Aug 11, 2017 at 13:46

Alberto Trindade Tavares

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Comments

Rajib Chy · Accepted Answer · 2018-04-04 13:23:31Z

Data Table as following==>

var dataTable = [{
    "_id": "0", "yacht_id": "200",
    "promo_id": "300", "blocked_thru": "promotions", "dates": "2017-08-23T00:00:00.000Z"
}, {
    "_id": "1", "booking_id": {
        "_id": "100", "booking_id": "BK163041494"
    },
    "blocked_thru": "booked", "dates": "2017-08-30T00:00:00.000Z"
}, {
    "_id": "2", "booking_id": {
        "_id": "100", "booking_id": "BK163041494"
    },
    "blocked_thru": "booked", "dates": "2017-08-30T00:00:00.000Z"
}];

Create a method as like as bellow, that(s) return you unique row(s)==>

function getUniqueRows( data ) {
    let uniqueRows = []; let book = [];
    for ( let i = 0, l = data.length; i < l; i++ ) {
        let obj = data[i];
        if ( typeof ( obj.booking_id ) !== 'object' ) {
            uniqueRows.push( obj );
            continue;
        }
        if ( book.find( a => a == obj.booking_id._id ) !== undefined )
            continue;
        uniqueRows.push( obj );
        book.push( obj.booking_id._id );
    }
    return uniqueRows;
};

and use var myUniqueRows = getUniqueRows( dataTable );

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