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

removeDuplicatesFromArray.js

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");