JOIN_Clause
A table reference is also known as a join expression.
表引用也被称为连接表达式。
A table reference (when it refers to a partitioned table) may contain a PARTITION clause, including a list of comma-separated partitions, subpartitions, or both. This option follows the name of the table and precedes any alias declaration. The effect of this option is that rows are selected only from the listed partitions or subpartitions. Any partitions or subpartitions not named in the list are ignored.
一个表的引用 ...
Vim键位图
原图官网:
http://www.viemu.com/a_vi_vim_graphical_cheat_sheet_tutorial.html
http://michael.peopleofhonoronly.com/vim/
经典版中文版一般命令模式编程进阶版原图下载地址
https://gitee.com/yichangkong/FigureBed/blob/master/img/vi-vim-tutorial-svg.rar
RequireJs Overview
What is RequireJsRequireJs is a JavaScript file and module loader. It is optimized for in-browser use, but it can be used in other JavaScript environments, like Rhino and Node. Using a modular script loader like RequireJS will improve the speed and quality of your code.
IE 6+ ………. compatible ✔WhaFirefox 2+ ….. compatible ✔Safari 3.2+ …. compatible ✔Chrome 3+ …… compatible ✔Opera 10+ …… compatible ✔
Get started then check out the API.
引入RequireJs 有哪些好处
防止js加载阻塞页面渲染
什么是js加载阻塞?
index.html:
1234 ...
SSM架构下的Cors跨域问题
What is Cors?Cross-Origin Resource Sharing (CORS)
先上MDN的原文解析
CORS 跨域 实现思路及相关解决方案
How did I find out about this problem?我是怎么发现这个问题的?
首先是我最近的项目是个ssm三端项目,后端的管理页面使用的是jsp技术,如果按照之前项目架构实现方案是不需要进行后端jsp页面跨域,但是我有新的业务需求需要跨域。
但是我还要按照之前的jsp页面构建方案将页面搭建成如下结构
按照上述的页面构建方案便可以保证我是无拦截的访问我本地服务器localhost:8080的API进行数据访问
但是按照上述的构造方案,进行ajax数据访问导致我出现了如下报错!
Solutions解决方案
按照上述的方法 既可以阻止页面进行Ajax前进行相关RequestHeader属性设置
再使用ajax进行访问外部网段API可以进行跨域请求
StackOverflow
StackOverflow相识问题的阐述
Request header field X-CSRFToken is n ...
DataTable
1.首先需要引用下面两个文件12 <link rel="stylesheet" href="https://cdn.datatables.net/1.10.16/css/jquery.dataTables.min.css" />\>
2.DataTable支持的数据类型https://www.datatables.net/manual/data/
2.1 数组123456789101112131415161718vardata = [ [ "Tiger Nixon", "System Architect", "Edinburgh", "5421", "2011/04/25", "$3,120" ], [ "Garrett Winters", ...
The Key To Accelerating Your Coding Skills
The Key To Accelerating Your Coding Skillslink
如何有效地快速提高自己编程能力的关键点When you learn to code, there is a moment when everything begins to change. At Firehose, we like to call this the inflection point of coding. After this phase, the way you operate as a developer will be dramatically different. Building up to the inflection point is the process of becoming self-sufficient in programming, to the point where you no longer need any hand-holding. It can be a frustrating experience, but once it’s behind ...
FTP Overview
File Transfer Protocol( 文件传输协议)
The File Transfer Protocol (FTP) is a standard network protocol used for the transfer of computer files between a client and server on a computer network.
FTP is built on a client-server model architecture using separate control and data connections between the client and the server.[1] FTP users may authenticate themselves with a clear-text sign-in protocol, normally in the form of a username and password, but can connect anonymously if the server is configured t ...
Gang of Four Design Patterns
老规矩上原链接
菜鸟翻译(YIChangKong)
Gang of Four Design Patterns(设计模式四门派)OverView(概述)
Over 20 years ago the iconic computer science book “Design Patterns: Elements of Reusable Object-Oriented Software” was first published.
The four authors of the book: Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides, have since been dubbed “The Gang of Four”. In technology circles, you’ll often see this nicknamed shorted to GoF. Even though the GoF Design Patterns book was published over 20 years ago, it stil ...
Intrinsic Locks and Synchronization
[Link](https://docs.oracle.com/javase/tutorial/essential/concurrency/locksync.html#:~:text=Every object has an intrinsic,when it’ target=)
Intrinsic Locks and Synchronization(内在锁和同步)Synchronization is built around an internal entity known as the intrinsic lock or monitor lock. (The API specification often refers to this entity simply as a “monitor.”) Intrinsic locks play a role in both aspects of synchronization: enforcing exclusive access to an object’s state and establishing happens-before rel ...
How to learn foreign language?
五个原则:1. 集中在对你有重要意义的外语内容上2. 把外语当作沟通工具3. 先理解含义再获取外语4. 生理训练占外语学习的一大半5. 掌握自己状态6.总结
5个原则,7个行动。
原则一:帮助你生存的信息,对你个人有“重要关联”。场景、上下文、词组。
原则二:语言是工具,要使用!面对面交流,电话、网络对话,邮件往来,社交网络互动,浏览外国资讯etc.
原则三:当你先理解沟通(场景)的含义,你会下意识获取语言的内容。还是场景。
同原则1 原则四:要学好外语就要练好“外语功夫”。听力、说话、书写等生理训练,让身体适应,神经细胞生长。
同原则2 原则五:轻松好奇+忍耐歧义=学得快。忍耐歧义:这些即使会一些外语单词遇到很多不懂的单词语法也能轻松好奇地交流的人,是忍耐歧义的人;那些要把所有都弄懂,稍微有一点弄不懂就不开心的人,对自己十分苛刻的人,就是没有忍耐歧义的人。
原则一和原则三,用看美剧来训练最适宜。
原则二和原则四,面对面交流,电话、网络对话,邮件往来,社交网络互动,浏览外国资讯etc.(宜先认识一个异性异国朋友)
原则五,谨记轻松好奇和忍耐歧义。
大量去听。目的:解决印象模糊、获取语 ...