原文:https://blog.csdn.net/weixin_44860135/article/details/97761411
splice我觉得很方便
数组.splice(开始下标,删除个数);
var a=[1,2,3,4,5]; a.splice(0,1); console.log(a); //返回结果 [2, 3, 4, 5]
var a=[1,2,3,4,5]; a.splice(1,2); console.log(a); //返回结果 [1, 4, 5]