JS,- JAVASCRIPT: REMOVE DUPLICATES FROM ARRAY OF OBJECTS

JS,NG2- JAVASCRIPT: REMOVE DUPLICATES FROM ARRAY OF OBJECTS
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var tmp = [
    {
        "uniqueCode" : "1234",
        "selected" : true,
        "otherVal" : "abc"
    },
    {
        "uniqueCode" : "5678",
        "selected" : false,
        "otherVal" : "abc"
    },
    {
        "uniqueCode" : "1234",
        "selected" : true,
        "otherVal" : "def"
    }
];

function removeDuplicates(arr, prop) {
     var new_arr = [];
     var lookup  = {};

     for (var i in arr) {
         lookup[arr[i][prop]] = arr[i];
     }

     for (i in lookup) {
         new_arr.push(lookup[i]);
     }

     return new_arr;
 }

var uniqueArray = removeDuplicates(tmp, "uniqueCode");

console.log(uniqueArray);

Ref: http://www.tjcafferkey.me/remove-duplicates-from-array-of-objects/