大约有 43,000 项符合查询结果(耗时:0.0461秒) [XML]

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MQTT与TCP的区别 - 创客硬件开发 - 清泛IT社区,为创新赋能!

...泄露告警或控制石油管道阀门的命令,就必须要在网络有问题的情况下也要能确保发送成功。 myriota这家提供物联网数据LEO卫星传输服务的公司,流量报价是1M字节的数据500美元/月。因此,每次传输节省几个字节也能省不少...
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MFC MDI程序的窗口菜单无法正确显示 - C/C++ - 清泛网 - 专注C/C++及内核技术

MFC MDI程序的窗口菜单无法正确显示问题的原因,是自己创建的菜单资源中没有任何一个子菜单被mfc框架认为是window子菜单,因此也就没有响应修改子菜单的内容。mfc的判断标准其...问题的原因,是自己创建的菜单资源中没有任...
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oracle:完整剖析PL/SQL DEVELOPER与SQL PLUS字符集设置 - 数据库(内核) - ...

...设置提要:本文重点剖析PL SQL DEVELOPER与SQL PLUS字符集设置问题,对两者的中文数据写入、读取之间整个流程做描述,抛砖引玉。工作后要保持...提要:本文重点剖析PL/SQL DEVELOPER与SQL PLUS字符集设置问题,对两者的中文数据写入、...
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从 !important 到关于叹号的 !一切 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...的人当然不只我一个,stackoverflow 上有个人也提了类似的问题:“为什么 CSS 和 C-based (的)语言中叹号的涵义相反?”他还问道:“除了 CSS,还有什么语言是用叹号表达肯定而非否定的呢?”(随后有人提醒他,自然语言就是...
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Check whether a request is GET or POST [duplicate]

... I've experienced environments where PHP doesn't actively set the $_POST global, so I agree that using the above method works much more reliably. – Nathan Crause Jul 5 '17 at 15:52 ...
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how to check and set max_allowed_packet mysql variable [duplicate]

... max_allowed_packet is set in mysql config, not on php side [mysqld] max_allowed_packet=16M You can see it's curent value in mysql like this: SHOW VARIABLES LIKE 'max_allowed_packet'; You can try to change it like this, but it's unlikely this will work on shared hostin...
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ie8 var w= window.open() - “Message: Invalid argument.”

...ng the following code its working... onclick="window.open('privacy_policy.php','','width=1200,height=800,scrollbars=yes'); Previously i Entered like onclick="window.open('privacy_policy.php','Window title','width=1200,height=800,scrollbars=yes'); Means Microsoft does not allow you to enter win...
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MySQL query String contains

...ttacks. Also, mysql_real_escape_string is going to be deprecated in future PHP releases. – Jack Tuck Feb 3 '14 at 21:24 11 ...
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get current url in twig template?

... @GateKiller This made my Functional Test Fail: Uncaught PHP Exception PHPUnit_Framework_Error_Notice: "Undefined index: REQUEST_URI" – Robin Aug 15 '14 at 10:18 ...
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汇编语言超浓缩教程(汇编入门必备) - C/C++ - 清泛网 - 专注C/C++及内核技术

...,所以我们不得不先了解一下CPU和内存:(关于数的进制问题在此不提)   CPU是可以执行电脑所有算术╱逻辑运算与基本 I/O 控制功能的一块芯片。一种汇编语言只能用于特定的CPU。也就是说,不同的CPU其汇编语言的指...