After following, you can keep track of his dynamic information in a timely manner
Courses in the relevant section：Array (3): add/update/delete/view
因为删除一个元素数组并不会更新数组所以，需要一个newarray 函数来更新当前数组
2020-03-050个赞
数组的键值限制于字符串于整数，整数的键值数组叫索引数组，字符串的数组叫关联数组
2020-03-050个赞
