登录表将包含user_id和time_accessed。SELECT user_id, date(time_accessed), count(user_id) AS login_within_5_hour_periodFROM loginORDER BY time_accessed;+---------+---------------------+
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我一直试图使用在MovPlayer中声明的变量将道具传递给子组件“this.state”,但似乎没有收到道具。当页面呈现空标记时。import React from "react";import NavBar from "./NavBar";import MovGallery from "./MovGallery";
class App exte
man umount2说:
MNT\_EXPIRE (since Linux 2.6.8) Mark the mount point as expired.The mount point remains expired as long as it isn't accessed by any process.