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Android应用开发性能优化完全分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...导致加载和执行缓慢,所以我们就来看看Lint这个工具是如何发现优化这些问题的(当然了,Lint实际的功能是非常强大的,我们开发中也是经常使用它来发现一些问题的,这里主要有点针对UI性能的说明了,其他的雷同)。 在And...
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PHP 错误记录和聚合的平台Sentry实战 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...和聚合的平台Sentry实战不管你用什么编程语言,都会面临如何处理错误日志的问题。很多程序员对错误日志放任自流,直到出现故障了才追悔莫及,如果问我怎么办,我会...不管你用什么编程语言,都会面临如何处理错误日志的...
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ATL COM开发入门(一)(JS调用ActiveX/COM组件) - C/C++ - 清泛网 - 专注C/C++及内核技术

...它进行COM开发。本文通过一个基础入门的例子,简要介绍如何定义、实现C...ATL(Active Template Library)动态模板库,是一个类库,可以使用它进行COM开发。本文通过一个基础入门的例子,简要介绍如何定义、实现COM接口,前台如何...
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ATL COM开发入门(二)(ActiveX/COM组件回调JS) - C/C++ - 清泛网 - 专注C/C++及内核技术

...OM组件回调JS)ATL回调js函数、ATL定时器使用方法、ATL后台如何获取并操作前台DOM元素。本文代码基于上篇《ATL COM开发入门(一)(JS调用ActiveX/COM组件)》。 完成的需求:后台ATL代码回调前台js函数,后台ATL启动定时器完成前台...
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任何组件块 · App Inventor 2 中文网

... 参数为 true 组件。 考虑以下事件处理伪代码,看看它是如何工作的: 发生一个事件,例如用户单击名为 Button1 的按钮。 组件被初始化为Button1。 notAlreadyHandled 初始化为true。 App Inventor 检查 when Button1.Click 是否存在。 ...
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Insert into … values ( SELECT … FROM … )

... struggle to remember the correct syntax for the SQL engine of the day ( MySQL , Oracle , SQL Server , Informix , and DB2 ). ...
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How to find Unused Amazon EC2 Security groups

... from complete. So I decided to write my own script. I used the AWS CLI, MySQL and some “Bash-foo” to perform the following: Get a list of all EC2 security groups. I store the group-id, group-name and description in a tabled called “groups” in a MySQL database called aws_security_groups ...
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Preserve Line Breaks From TextArea When Writing To MySQL

...s two method steps for preserve same text which is in textarea to store in mysql and at a getting time i can also simply displaying plain text..... step 1: $status=$_POST['status'];<br/> $textToStore = nl2br(htmlentities($status, ENT_QUOTES, 'UTF-8')); In query enter $textToStore.... step 2: ...
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Best database field type for a URL

I need to store a url in a MySQL table. What's the best practice for defining a field that will hold a URL with an undetermined length? ...
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count(*) vs count(column-name) - which is more correct? [duplicate]

... there is a performance difference (at least in MySQL) as well (see my answer). – nickf Jun 9 '10 at 7:51 1 ...