大约有 2,200 项符合查询结果(耗时:0.0174秒) [XML]

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throw new std::exception vs throw std::exception

...tions#what-to-catch https://isocpp.org/wiki/faq/exceptions#catch-by-ptr-in-mfc Basically "unless there's a good reason not to, catch by reference. Avoid catching by value, since that causes a copy to be made and the copy can have different behavior from what was thrown. Only under very special cir...
https://www.tsingfun.com/ilife/tech/1934.html 

一文讲透区块链技术原理 - 资讯 - 清泛网 - 专注C/C++及内核技术

...到区块链的最后,则此区块的数据记录就再也不能改变或删除。这个特点保证了数据库的严谨性,即无法被篡改。 顾名思义,区块链就是区块以链的方式组合在一起,以这种方式形成的数据库我们称之为区块链数据库。区块链...
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【App Inventor 2 数据可视化】使用柱状图和饼图收集数据 - App应用开发 - ...

...化组件来自App Inventor的布局抽屉。 horizontalarrangement4包含删除应用程序中所有数据的重置按钮。 3. 查看代码:点击App Inventor中的Blocks逻辑设计查看初始项目的代码: 第2部分:在应用中添加图表4. 使用图表组件(<font class=&quo...
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由12306.cn谈谈网站性能技术 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...中心的票量数据,这是不一样的。不要觉得网游或是QQ能你就以为这是一样的。网游和QQ 的后端负载相对于电子商务的系统还是简单。 其二,有人说春节期间订火车的这个事好像网站的秒杀活动。的确很相似,但是如果你...
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那些微信公众大号是如何赚钱的? - 资讯 - 清泛网 - 专注C/C++及内核技术

...争对手恶意举报,微信的很多规则也在变,文章很容易被删除,没有安全感。 P2P观察:微信平台的很多规则,不是十分透明完善,出现什么问题,很难取得有效沟通效果。 味茗美食团:在运营过程中提高公众号影响力,多方...
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周鸿祎创业以来的“六大战役” 酷派会是最后一战 - 资讯 - 清泛网 - 专注C/...

...360开始向瑞星发起进攻,其杀毒软件自动在电脑上拦截并删除了瑞星的防火墙。“360安全卫士”利用开机加速的功能,用户开机后,显示开机用了多少时间,并且会出现“一键优化”的功能键。一旦用户点击“一键优化”,360安...
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What is “stdafx.h” used for in Visual Studio?

... Historical curiosity. The name of stdafx.h dates from around 1992, when MFC was called 'Application Framework Extensions' before its release. Visual Studio 2015 still defaults to the name .. – kert Jan 9 '16 at 20:28 ...
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What are the rules about using an underscore in a C++ identifier?

...riables, rather than local variables or parameters. If you've come from an MFC background, you'll probably use m_foo . I've also seen myFoo occasionally. ...
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Understanding events and event handlers in C#

... for your event handler. (Stupidly, OnXXX is taken to mean 'handle XXX' in MFC, and 'raise XXX' in .net, and so now its meaning is unclear and confusing - see this post for details ). Preferred names would be RaiseXXX to raise events, and HandleXXX or Sender_XXX to for event handlers. ...
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ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

...可丢失这个事实而提供了可靠性保证。 ØMQ抽象了指定发送数据到特定网络位置这样需求。消息是被发送到拓扑的,而不是发送给特定的终端节点。重新调用哪个与特定商务逻辑紧密相连的拓扑意味着当你发送消息给拓扑...