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Recursion or Iteration?

...n if the recursive function is tail recursive (the last line is recursive call). Tail recursion should be recognized by the compiler and optimized to its iterative counterpart (while maintaining the concise, clear implementation you have in your code). I would write the algorithm in the way that m...
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CORS Access-Control-Allow-Headers wildcard being ignored?

... Support for wildcards in the Access-Control-Allow-Headers header was added to the living standard only in May 2016, so it may not be supported by all browsers. On browser which don't implement this yet, it must be an exact match: https://www.w3.org/TR/2014/REC-cors-201...
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移动前端开发之viewport的深入理解 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...是,devicePixelRatio在不同的浏览器中还存在些许的兼容性问题,所以我们现在还并不能完全信赖这个东西,具体的情况可以看下这篇文章。 devicePixelRatio的测试结果: 三、PPK的关于三个viewport的理论 ppk大神对于移动设备上...
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CMap用法 - C/C++ - 清泛网 - 专注C/C++及内核技术

...Y要选LPCTSTR。 遇到好几个人说CMap在用CString做key类型时有问题,说用int和DWORD就可以,用CString就不行。因此很多人推荐使用MFC中的CMapStringToPtr之类。关键是ARG_KEY要选LPCTSTR,否则编译报错。 CMap<CString, LPCTSTR, int, int> typeMap; typeM...
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MFC OnKeyDown没反应,不响应键盘操作 - C/C++ - 清泛网 - 专注C/C++及内核技术

... return __super::PreTranslateMessage(pMsg); } 深入探索该问题请移步: http://wenku.baidu.com/link?url=2eG1TLx_ARJHKO6LFtZU_u6AOv6Pw8RyemsJEXvaKYwvQRHAh43D-TnvQZvt3-U5JMZjRqE835qeArbKKscaO-YAxfwBkepkYbdbzc2iEZKMFC OnKeyDown
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HAXM 安装/启动失败? - App Inventor 2 离线版 - 清泛IT社区,为创新赋能!

... 使用 Hyper-V 加速 或 切换到 ARM 版本的模拟器。如果还有问题,可以查看 Android Studio 的 AVD Manager 里模拟器的 CPU 选项,确保选择了 x86 而不是 x86_64,或者使用 ARM 版本的系统镜像。
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How do getters and setters work?

I'm from the php world. Could you explain what getters and setters are and could give you some examples? 6 Answers ...
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华为公司的新产品研发流程管理 - 项目管理 - 清泛网 - 专注C/C++及内核技术

...要信息或是已知的也或是可知的,只是没有人提出正确的问题或没有人做出正确的决策而已。   研究表明,如果一个公司较早做出取消或调整的决定,那么在那些没有投入市场的产品上所浪费的便要减少许多。一流公司在计...
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从估值5千万到一无所有 90后的他感觉梦境一场 - 资讯 - 清泛网 - 专注C/C++...

...O2O现在还没到风口。宠物行业的根本不在这里,这是源头问题。”与此同时,他对爱狗团的方向也进行了调整。夏军原本做的是宠物O2O,类似于美团的团购模式,将买家导入到线下的商户。而他放弃了O2O做法,现在做的模式不像...
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Using Default Arguments in a Function

...= "some other value"; } code here! } This way, you can make a call like foo('blah', null, 'non-default y value'); and have it work as you want, where the second parameter $x still gets its default value. With this method, passing a null value means you want the default value for one par...