An approach to get unique results from an array of objects having a duplicate value for a `key`.

Unique Arrays

//Object Array with duplicate data
var objArr = [{
  "name": "abc"
}, {
  "name": "abc"
}, {
  "name": "def"
}, {
  "name": "def"
}, {
  "name": "def"
}];

//array that holds the value you want unique
function makeUnique(arr, key) {
  var uniqueName = [];
  var result = [];
  objArr.map(function(e, i) {
    if (uniqueName.indexOf(e[key]) == -1) {
      uniqueName.push(e[key]);
      result.push(e);
    }
  })
  return result;
}

console.log(makeUnique(objArr, "name"));