Javascript: overload clean empty item of Array

hunttingteacher.user.es6

    //删除数组中的空元素
    $.extend(Array.prototype, {
      clean: function(deleteValue = "") {
        for(var i = 0; i < this.length; i++) {
          if(this[i] == deleteValue) {
            this.splice(i, 1);
            i--;
          }
        }
        return this;
      }
    });