一，清空数组var ary = [1,2,3,4];ary.splice(0,ary.length);//清空数组console.log(ary); // 输出 []，空数组二，删除数组元素var ary = [1,2,3,4];ary.splice(0,1);或 ary.splice($.inArray(2, ary), 1); 其中$.inArray(2, ary)用来查找某元素在数组中的索引