Combining JavaScript objects in an array with same key value

Question

I have been trying to combine objects inside an array with same id-value. The array that I have is like this:

[
{\"id\" : \"abcd\",\"val1\" : 1,\"val2\": 1,          


        

Answer 1

Refer the below example

var array = [{
    "sequence" : 1,
    "locationId" : "332228",
    "lat" : 25.246511,
    "lng" : 55.293837,
    "stopName" : "332228",
    "locationType" : "service",
    "serviceType" : "Delivery",
    "arrivalTime" : 37666,
    "departureTime" : 37830,
    "travelTime" : 1593,
    "travelDistance" : 20985,
    "travelCost" : 0,
    "serviceTime" : 30,
    "serviceTimeCost" : 0,
    "tripNumber" : 0,
    "orders" : [ 
        {
            "orderId" : "AQ137O1701240",
            "SIZE1" : "28",
            "SIZE2" : "520",
            "SIZE3" : "52"
        }
    ],
    "stopId" : "SkhirG2ioZ"
}, 
{
    "sequence" : 2,
    "locationId" : "332228",
    "lat" : 25.236407,
    "lng" : 55.272403,
    "stopName" : "332228",
    "locationType" : "service",
    "serviceType" : "Delivery",
    "arrivalTime" : 38575,
    "departureTime" : 38605,
    "travelTime" : 1593,
    "travelDistance" : 20985,
    "travelCost" : 0,
    "serviceTime" : 30,
    "serviceTimeCost" : 0,
    "tripNumber" : 0,
    "orders" : [ 
        {
            "orderId" : "AQ137O1701233",
            "SIZE1" : "23",
            "SIZE2" : "402",
            "SIZE3" : "30"
        }
    ],
    "stopId" : "H1iirfhisW"
}, 
{
    "sequence" : 3,
    "locationId" : "332228",
    "lat" : 25.221368,
    "lng" : 55.265915,
    "stopName" : "332228",
    "locationType" : "service",
    "serviceType" : "Delivery",
    "arrivalTime" : 39137,
    "departureTime" : 39167,
    "travelTime" : 974,
    "travelDistance" : 5717,
    "travelCost" : 0,
    "serviceTime" : 30,
    "serviceTimeCost" : 0,
    "tripNumber" : 0,
    "orders" : [ 
        {
            "orderId" : "AQ110O1705036",
            "SIZE1" : "60",
            "SIZE2" : "1046",
            "SIZE3" : "68"
        }
    ],
    "stopId" : "H1csHM3jjb"
}]

var arrOut = [];

array.forEach(function(value) {
  var existing = arrOut.filter(function(v, i) {
    return v.locationId == value.locationId;
  });
  if (existing.length) {
    var existingIndex = arrOut.indexOf(existing[0]);
    arrOut[existingIndex].orders = arrOut[existingIndex].orders.concat(value.orders);
  } else {
    if(Array.isArray(value.orders)){
      value.orders = value.orders
      arrOut.push(value); 
    }
  }
});


document.write('
' + JSON.stringify(arrOut, 0, 4) + '
');