JS实现数组简单去重及数组根据对象中的元素去重操作示例

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]) {
      result.push(elem);
      hash[elem] = true;
    }
  }
  return result;
}
console.log(arrayUnique1(arr1));

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 hash = {};
  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"));