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var arr1 = [1, 2, 3, 4, 5, 6, 3, 4, 3];

function arrayUnique1(arr) {

  var result = [], hash = {};

  for (var i = 0, elem; (elem = arr[i]) != null; i++) {

    if (!hash[elem]) {

      hash[elem] = true;

    }

  }

  return result;

}

console.log(arrayUnique1(arr1));

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var arr2 = [

  { name: "name1", num: "1" },

  { name: "name2", num: "11" },

  { name: "name3", num: "12" },

  { name: "name4", num: "13" },

  { name: "name2", num: "1" },

  { name: "name6", num: "12" }

]

function arrayUnique2(arr, name) {

  var

  return arr.reduce(function (item, next) {

    hash[next[name]] ? '' : hash[next[name]] = true && item.push(next);

    return item;

  }, []);

}

console.log(arrayUnique2(arr2, "name"));

console.log(arrayUnique2(arr2, "num"));