Javascript新手入门实践:note-book-js项目挑战指南

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资源摘要信息:"note-book-js:Javascript 新手的挑战" 本挑战是一个面向初学者的JavaScript项目,旨在帮助初学者巩固通过CodeAcademy课程学到的知识,并在实际编程环境中应用。项目的重点是创建一个简单的小笔记本应用,这将帮助新手理解在实际工作场景中遇到的代码和编程模式。 1. 开始项目之前的环境配置 在这个挑战中,首先需要在本地环境中配置开发环境。以下是一些关键步骤和命令: - 使用`sudo apt-get install nodejs npm`命令:这个命令用于安装Node.js和npm(Node.js的包管理器)。Node.js是一个基于Chrome V8引擎的JavaScript运行时环境,允许开发者使用JavaScript编写服务器端代码。npm是随Node.js一起安装的,它是一个包含许多有用库的包管理器,可以安装和管理JavaScript包。 - 使用`sudo npm install -g jsdoc local-web-server`命令:这个命令用于全局安装两个npm包——`jsdoc`和`local-web-server`。`jsdoc`是一个工具,用于从代码注释中自动生成文档。这对于编写清晰、规范的代码注释非常重要,有助于其他开发者阅读和理解代码。`local-web-server`是一个简单的HTTP服务器,可以在本地环境中运行,方便开发者预览网页应用而不必依赖远程服务器。 2. 运行项目代码 - 执行`jsdoc .`命令:在安装好`jsdoc`之后,可以通过这个命令来扫描当前目录下的所有JavaScript文件,并根据注释生成API文档。这对于大型项目的文档管理非常有帮助,可以让其他开发者快速了解代码库中函数和模块的用途和使用方法。 - 执行`ws`命令:`local-web-server`可以简写为`ws`,执行后会在当前目录启动一个简单的web服务器。默认情况下,它会监听本地8000端口,并以当前目录作为根目录。这样开发者就可以在浏览器中通过`***`访问服务器,并查看项目在浏览器中的运行情况。 3. 文件夹结构和项目构建 虽然具体的文件夹结构未在描述中提供,但通常这类挑战性项目会包含以下基本结构: - `src`文件夹:存放源代码,如JavaScript文件。 - `index.html`:项目的入口HTML文件,用于展示内容和组织JavaScript、CSS等资源。 - `style.css`:用于存放项目的样式信息。 - `package.json`:包含项目依赖和脚本的JSON文件。 为了完成这个挑战,初学者需要编写JavaScript代码,并在`src`文件夹中组织他们的JavaScript文件。然后,他们需要编写HTML来引用这些JavaScript文件,以及编写CSS来美化网页界面。项目可能还涉及一些前端构建工具如Webpack或Babel,这些工具在现代JavaScript项目中很常见,尽管在这个简单挑战中可能不涉及。 4. JavaScript编程实践 - 编写可读且高效的JavaScript代码:项目要求新手按照实际工作中的标准编写代码,这意味着要注重代码的可读性和维护性。代码应该具有良好的注释,并遵循JavaScript编程的最佳实践。 - 解决实际问题:挑战中提到的“小笔记本”应用可能需要处理用户输入、存储笔记、检索笔记等功能。这些功能的实现将涉及到变量、循环、条件语句、函数、事件处理等基础概念,同时可能还会引入异步编程的概念,如使用`async/await`处理异步操作。 - 掌握基本的前端技术:在完成挑战的过程中,开发者会学习到如何将JavaScript与HTML和CSS结合来构建前端用户界面,这将帮助他们在未来构建更为复杂的网页应用。 总的来说,这个挑战是一个很好的机会,让JavaScript新手在实践中学习和应用他们所学的知识,并为他们提供了一个实际的项目环境,以模拟真实世界的工作流程。通过完成这个挑战,新手将能更好地理解软件开发周期,并准备好进入更高级的JavaScript编程实践。

[root@QAQ ~]# sudo tail -n 50 /var/log/mysql/error.log 2023-07-14T02:43:01.816556Z 0 [Note] Shutting down plugin 'partition' 2023-07-14T02:43:01.816558Z 0 [Note] Shutting down plugin 'BLACKHOLE' 2023-07-14T02:43:01.816566Z 0 [Note] Shutting down plugin 'ARCHIVE' 2023-07-14T02:43:01.816568Z 0 [Note] Shutting down plugin 'PERFORMANCE_SCHEMA' 2023-07-14T02:43:01.816594Z 0 [Note] Shutting down plugin 'MRG_MYISAM' 2023-07-14T02:43:01.816597Z 0 [Note] Shutting down plugin 'MyISAM' 2023-07-14T02:43:01.816605Z 0 [Note] Shutting down plugin 'INNODB_SYS_VIRTUAL' 2023-07-14T02:43:01.816608Z 0 [Note] Shutting down plugin 'INNODB_SYS_DATAFILES' 2023-07-14T02:43:01.816610Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLESPACES' 2023-07-14T02:43:01.816612Z 0 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN_COLS' 2023-07-14T02:43:01.816614Z 0 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN' 2023-07-14T02:43:01.816616Z 0 [Note] Shutting down plugin 'INNODB_SYS_FIELDS' 2023-07-14T02:43:01.816618Z 0 [Note] Shutting down plugin 'INNODB_SYS_COLUMNS' 2023-07-14T02:43:01.816620Z 0 [Note] Shutting down plugin 'INNODB_SYS_INDEXES' 2023-07-14T02:43:01.816622Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLESTATS' 2023-07-14T02:43:01.816624Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLES' 2023-07-14T02:43:01.816626Z 0 [Note] Shutting down plugin 'INNODB_FT_INDEX_TABLE' 2023-07-14T02:43:01.816628Z 0 [Note] Shutting down plugin 'INNODB_FT_INDEX_CACHE' 2023-07-14T02:43:01.816630Z 0 [Note] Shutting down plugin 'INNODB_FT_CONFIG' 2023-07-14T02:43:01.816632Z 0 [Note] Shutting down plugin 'INNODB_FT_BEING_DELETED' 2023-07-14T02:43:01.816634Z 0 [Note] Shutting down plugin 'INNODB_FT_DELETED' 2023-07-14T02:43:01.816636Z 0 [Note] Shutting down plugin 'INNODB_FT_DEFAULT_STOPWORD' 2023-07-14T02:43:01.816638Z 0 [Note] Shutting down plugin 'INNODB_METRICS' 2023-07-14T02:43:01.816640Z 0 [Note] Shutting down plugin 'INNODB_TEMP_TABLE_INFO' 2023-07-14T02:43:01.816642Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_POOL_STATS' 2023-07-14T02:43:01.816644Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE_LRU' 2023-07-14T02:43:01.816645Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE' 2023-07-14T02:43:01.816647Z 0 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX_RESET' 2023-07-14T02:43:01.816649Z 0 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX' 2023-07-14T02:43:01.816651Z 0 [Note] Shutting down plugin 'INNODB_CMPMEM_RESET' 2023-07-14T02:43:01.816653Z 0 [Note] Shutting down plugin 'INNODB_CMPMEM' 2023-07-14T02:43:01.816655Z 0 [Note] Shutting down plugin 'INNODB_CMP_RESET' 2023-07-14T02:43:01.816657Z 0 [Note] Shutting down plugin 'INNODB_CMP' 2023-07-14T02:43:01.816659Z 0 [Note] Shutting down plugin 'INNODB_LOCK_WAITS' 2023-07-14T02:43:01.816661Z 0 [Note] Shutting down plugin 'INNODB_LOCKS' 2023-07-14T02:43:01.816664Z 0 [Note] Shutting down plugin 'INNODB_TRX' 2023-07-14T02:43:01.816666Z 0 [Note] Shutting down plugin 'InnoDB' 2023-07-14T02:43:01.816703Z 0 [Note] InnoDB: FTS optimize thread exiting. 2023-07-14T02:43:01.816748Z 0 [Note] InnoDB: Starting shutdown... 2023-07-14T02:43:01.916861Z 0 [Note] InnoDB: Dumping buffer pool(s) to /www/server/data/ib_buffer_pool 2023-07-14T02:43:01.917024Z 0 [Note] InnoDB: Buffer pool(s) dump completed at 230714 10:43:01 2023-07-14T02:43:03.438469Z 0 [Note] InnoDB: Shutdown completed; log sequence number 2767449 2023-07-14T02:43:03.439797Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 2023-07-14T02:43:03.439814Z 0 [Note] Shutting down plugin 'MEMORY' 2023-07-14T02:43:03.439819Z 0 [Note] Shutting down plugin 'CSV' 2023-07-14T02:43:03.439823Z 0 [Note] Shutting down plugin 'sha256_password' 2023-07-14T02:43:03.439825Z 0 [Note] Shutting down plugin 'mysql_native_password' 2023-07-14T02:43:03.439939Z 0 [Note] Shutting down plugin 'binlog' 2023-07-14T02:43:03.440752Z 0 [Note] /www/server/mysql/bin/mysqld: Shutdown complete

2023-07-15 上传

[root@QAQ ~]# sudo tail -n 50 /var/log/mysql/error.log 2023-07-14T02:45:21.370949Z 0 [Note] Shutting down plugin 'partition' 2023-07-14T02:45:21.370952Z 0 [Note] Shutting down plugin 'BLACKHOLE' 2023-07-14T02:45:21.370954Z 0 [Note] Shutting down plugin 'ARCHIVE' 2023-07-14T02:45:21.370956Z 0 [Note] Shutting down plugin 'PERFORMANCE_SCHEMA' 2023-07-14T02:45:21.370993Z 0 [Note] Shutting down plugin 'MRG_MYISAM' 2023-07-14T02:45:21.370995Z 0 [Note] Shutting down plugin 'MyISAM' 2023-07-14T02:45:21.371003Z 0 [Note] Shutting down plugin 'INNODB_SYS_VIRTUAL' 2023-07-14T02:45:21.371011Z 0 [Note] Shutting down plugin 'INNODB_SYS_DATAFILES' 2023-07-14T02:45:21.371013Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLESPACES' 2023-07-14T02:45:21.371015Z 0 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN_COLS' 2023-07-14T02:45:21.371017Z 0 [Note] Shutting down plugin 'INNODB_SYS_FOREIGN' 2023-07-14T02:45:21.371018Z 0 [Note] Shutting down plugin 'INNODB_SYS_FIELDS' 2023-07-14T02:45:21.371020Z 0 [Note] Shutting down plugin 'INNODB_SYS_COLUMNS' 2023-07-14T02:45:21.371022Z 0 [Note] Shutting down plugin 'INNODB_SYS_INDEXES' 2023-07-14T02:45:21.371024Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLESTATS' 2023-07-14T02:45:21.371026Z 0 [Note] Shutting down plugin 'INNODB_SYS_TABLES' 2023-07-14T02:45:21.371028Z 0 [Note] Shutting down plugin 'INNODB_FT_INDEX_TABLE' 2023-07-14T02:45:21.371030Z 0 [Note] Shutting down plugin 'INNODB_FT_INDEX_CACHE' 2023-07-14T02:45:21.371032Z 0 [Note] Shutting down plugin 'INNODB_FT_CONFIG' 2023-07-14T02:45:21.371033Z 0 [Note] Shutting down plugin 'INNODB_FT_BEING_DELETED' 2023-07-14T02:45:21.371035Z 0 [Note] Shutting down plugin 'INNODB_FT_DELETED' 2023-07-14T02:45:21.371037Z 0 [Note] Shutting down plugin 'INNODB_FT_DEFAULT_STOPWORD' 2023-07-14T02:45:21.371039Z 0 [Note] Shutting down plugin 'INNODB_METRICS' 2023-07-14T02:45:21.371041Z 0 [Note] Shutting down plugin 'INNODB_TEMP_TABLE_INFO' 2023-07-14T02:45:21.371043Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_POOL_STATS' 2023-07-14T02:45:21.371045Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE_LRU' 2023-07-14T02:45:21.371047Z 0 [Note] Shutting down plugin 'INNODB_BUFFER_PAGE' 2023-07-14T02:45:21.371049Z 0 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX_RESET' 2023-07-14T02:45:21.371050Z 0 [Note] Shutting down plugin 'INNODB_CMP_PER_INDEX' 2023-07-14T02:45:21.371052Z 0 [Note] Shutting down plugin 'INNODB_CMPMEM_RESET' 2023-07-14T02:45:21.371054Z 0 [Note] Shutting down plugin 'INNODB_CMPMEM' 2023-07-14T02:45:21.371056Z 0 [Note] Shutting down plugin 'INNODB_CMP_RESET' 2023-07-14T02:45:21.371058Z 0 [Note] Shutting down plugin 'INNODB_CMP' 2023-07-14T02:45:21.371060Z 0 [Note] Shutting down plugin 'INNODB_LOCK_WAITS' 2023-07-14T02:45:21.371062Z 0 [Note] Shutting down plugin 'INNODB_LOCKS' 2023-07-14T02:45:21.371064Z 0 [Note] Shutting down plugin 'INNODB_TRX' 2023-07-14T02:45:21.371066Z 0 [Note] Shutting down plugin 'InnoDB' 2023-07-14T02:45:21.371100Z 0 [Note] InnoDB: FTS optimize thread exiting. 2023-07-14T02:45:21.371135Z 0 [Note] InnoDB: Starting shutdown... 2023-07-14T02:45:21.471280Z 0 [Note] InnoDB: Dumping buffer pool(s) to /www/server/data/ib_buffer_pool 2023-07-14T02:45:21.471421Z 0 [Note] InnoDB: Buffer pool(s) dump completed at 230714 10:45:21 2023-07-14T02:45:22.992635Z 0 [Note] InnoDB: Shutdown completed; log sequence number 2767468 2023-07-14T02:45:22.993964Z 0 [Note] InnoDB: Removed temporary tablespace data file: "ibtmp1" 2023-07-14T02:45:22.993980Z 0 [Note] Shutting down plugin 'MEMORY' 2023-07-14T02:45:22.993985Z 0 [Note] Shutting down plugin 'CSV' 2023-07-14T02:45:22.993989Z 0 [Note] Shutting down plugin 'sha256_password' 2023-07-14T02:45:22.993991Z 0 [Note] Shutting down plugin 'mysql_native_password' 2023-07-14T02:45:22.994103Z 0 [Note] Shutting down plugin 'binlog' 2023-07-14T02:45:22.994915Z 0 [Note] /www/server/mysql/bin/mysqld: Shutdown complete

2023-07-20 上传

2023-06-08T02:25:37.583259Z 1 [Note] WSREP: GCache history reset: 00000000-0000-0000-0000-000000000000:0 -> c443b2d8-05a0-11ee-86b8-2e0fddf21737:0 2023-06-08T02:25:39.261528Z WSREP_SST: [INFO] Streaming with xbstream 2023-06-08T02:25:39.273174Z WSREP_SST: [INFO] WARNING: Stale temporary SST directory: /data/mysql//.sst from previous state transfer. Removing 2023-06-08T02:25:39.279749Z WSREP_SST: [INFO] Proceeding with SST......... 2023-06-08T02:25:39.519583Z 0 [Note] WSREP: (c05c7a4e, 'tcp://0.0.0.0:4567') turning message relay requesting off 2023-06-08T02:25:39.553817Z WSREP_SST: [INFO] ............Waiting for SST streaming to complete! 2023-06-08T02:25:49.257301Z WSREP_SST: [ERROR] ******************* FATAL ERROR ********************** 2023-06-08T02:25:49.260159Z WSREP_SST: [ERROR] xtrabackup_checkpoints missing. xtrabackup/SST failed on DONOR. Check DONOR log 2023-06-08T02:25:49.262811Z WSREP_SST: [ERROR] ****************************************************** 2023-06-08T02:25:49.266472Z WSREP_SST: [ERROR] Cleanup after exit with status:2 2023-06-08T02:25:49.289335Z 0 [Warning] WSREP: 1.0 (host78): State transfer to 0.0 (host79) failed: -22 (Invalid argument) 2023-06-08T02:25:49.289400Z 0 [ERROR] WSREP: gcs/src/gcs_group.cpp:gcs_group_handle_join_msg():811: Will never receive state. Need to abort. 2023-06-08T02:25:49.289465Z 0 [Note] WSREP: gcomm: terminating thread 2023-06-08T02:25:49.289494Z 0 [Note] WSREP: gcomm: joining thread 2023-06-08T02:25:49.289662Z 0 [Note] WSREP: gcomm: closing backend 2023-06-08T02:25:49.593055Z 0 [ERROR] WSREP: Process completed with error: wsrep_sst_xtrabackup-v2 --role 'joiner' --address '10.106.113.79' --datadir '/data/mysql/' --defaults-file '/etc/my.cnf' --defaults-group-suffix '' --parent '9996' --mysqld-version '5.7.41-44-57' '' : 2 (No such file or directory) 2023-06-08T02:25:49.593124Z 0 [ERROR] WSREP: Failed to read uuid:seqno from joiner script. 2023-06-08T02:25:49.593137Z 0 [ERROR] WSREP: SST script aborted with error 2 (No such file or directory) 2023-06-08T02:25:49.593186Z 0 [ERROR] WSREP: SST failed: 2 (No such file or directory) 2023-06-08T02:25:49.593234Z 0 [ERROR] Aborting 2023-06-08T02:25:49.593269Z 0 [Note] WSREP: Signalling cancellation of the SST request. 2023-06-08T02:25:49.593306Z 0 [Note] WSREP: SST request was cancelled 2023-06-08T02:25:49.593337Z 0 [Note] Giving 2 client threads a chance to die gracefully 2023-06-08T02:25:49.593357Z 1 [Note] WSREP: Closing send monitor... 2023-06-08T02:25:49.593370Z 1 [Note] WSREP: Closed send monitor. 2023-06-08T02:25:50.292465Z 0 [Note] WSREP: Current view of cluster as seen by this node

2023-06-09 上传