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Best way to represent a fraction in Java?

...on("Unknown format '" + s + "'"); } // this translates 23.123e5 to 25,123 / 1000 * 10^5 = 2,512,300 / 1 (GCD) String whole = m.group(1); String decimal = m.group(2); String exponent = m.group(3); String n = whole; // 23.123 => 23123 ...
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Python argparse mutual exclusive group

... answered Dec 28 '14 at 10:38 Oz123Oz123 21.4k2222 gold badges9494 silver badges163163 bronze badges ...
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三个退出程序消息:WM_CLOSE、WM_DESTROY、WM_QUIT区别 - C/C++ - 清泛网 -...

...程处理完消息后才返回 2、三个消息的区别 WM_CLOSE: 在系统菜单里选择了“关闭”或者点击了窗口右上角的“X”按钮,你的窗口过程就会收到WM_CLOSE。DefWindowProc对 WM_CLOSE的处理是调用DestroyWindow。当然,你可以不让DefWindowProc处...
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What is the meaning and difference between subject, user and principal?

...clarify "User - subset of principal"? If John is the subject and "account #123" is his principal, the user is who? Are there two John's? Since Genus > Species > Individual is increasingly specific, John (user) should be more specific than John (subject). Or am I missing something? ...
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static const vs #define

...uld be very like to see a comparison table. – Unknown123 Apr 25 '19 at 3:49 2 ...
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创业公司如何实施敏捷开发 - 资讯 - 清泛网 - 专注C/C++及内核技术

...成了这两个项目,也没有影响老项目的维护。我们是怎么操作的?最开始我们两个开发,这个时候只要两个人就能够很好的合作把产品开发出来,不需要什么模式。随着人员的扩充,团队间如何协作按时按质按量完成任务就需要...
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Apache两种工作模式区别及配置切换 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...模式可以不必在请求到来时再产生新的进程,从而减小了系统开销以增加性能。   MaxSpareServers设置了最大的空闲进程数,如果空闲进程数大于这个值,Apache会自动kill掉一些多余进程。这个值不要设得过大,但如果设的值比M...
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CentOS+Nginx+PHP+MySQL详细配置(图解) - PHP - 清泛IT论坛,有思想、有深度

...cre              //查询系统中有没有安装PCRE,一般装系统是默认装有,所以我们要删掉系统自带的 #cp /lib/libpcre.so.0 /           //在删除系统自带的PCRE之前,要先备...
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不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...是32766,要查询的路由表名称是main,后面依此类推。 3、操作系统在选路时首先根据路由规则选取table,然后再从table里选取相应路由,如果同一table里不同接口使用相同的网关,选路时会默认选择第一条路由 ,所以当有两个网...
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How to handle AccessViolationException

...rogram { static void InvokeCse() { IntPtr ptr = new IntPtr(123); System.Runtime.InteropServices.Marshal.StructureToPtr(123, ptr, true); } private static void ExecInThisDomain() { try { var o = new BoundaryLessExecHelper(); ...