Array.prototype.deleteEle = function() {            var newArr = this;            for (var i = newArr.length - 1; i >= 0; i--) {                var targetNode = newArr[i];                for (var j = 0; j < i; j++) {                    if (targetNode == newArr[j]) {                        newArr.splice(i, 1);                        break;                    }                }            }            return newArr;        }