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App Inventor 2 低功耗蓝牙 BlueToothLE 拓展 · App Inventor 2 中文网

...个传输单元中的有效传输数据)能够传输的最大数据量(多少字节可以一次性传输到对方)。 MTU 交换是为了在主从双方设置一个PDU中最大能够交换的数据量,通过MTU的交换和双方确认(注意这个MTU是不可以协商的,只是通...
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Where and why do I have to put the “template” and “typename” keywords?

...T>" is dependent, "typename" keyword needed A<T>::result_type n1; // OK result_type n2; } template<typename U> void g(); }; As can be seen, we need the disambiguation keyword even if the compiler could perfectly figure out itself that A::result_type can only be ...
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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

...名为upspec,255编号对应的别名为local,254和253对应的别名别为main和default,我们通常用route命令配置和查看的路由表信息为别名 为main的路由表信息。 2、路由规则负责定义路由策略,它定义来源哪里的IP需要查询哪个路由表(...
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cpuid汇编指令 - C/C++ - 清泛网 - 专注C/C++及内核技术

...么不管是那组功能,如何知道EAX中的功能代码最大可以是多少呢?根据Intel的说明,可以用如下方法: mov eax, 0 cpuid 执行完CPUID指令后,EAX中返回的值就是返回基本信息时,功能代码的最大值,在执行CPUID指令要求返回...
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正则表达式 30 钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术

正则表达式 30 钟入门教程来园子之前写的一篇正则表达式教程,部翻译自codeproject的The 30 Minute Regex Tutorial。由于评论里有过长的URL,所以本页排版比较... 来园子之前写的一篇正则表达式教程,部翻译自codeproject的The 30...
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Socket 错误返回码详解 - C/C++ - 清泛网 - 专注C/C++及内核技术

...以參數設定不同的選項而有不同的作用。對於每個選項多多少 少會有些限制,如有些選項只能用在stream socket,而有些只能用在datagram socket。如果違反這些限制,就會發生這個錯誤。請看下表: SO_DONTLINGER SO_KEEPALIVE SO_LINGER ...
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google mock享(全网最全最好的gmock文档,没有之一) - C/C++ - 清泛网 ...

...Cardinalities) 基数用于Times()中来指定模拟函数将被调用多少次| AnyNumber() 函数可以被调用任意次. AtLeast(n) 预计至少调用n次. AtMost(n) 预计至多调用n次. Between(m, n) 预计调用次数在m和n(包括n)之间. ...
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C++实现一款简单完整的聊天室服务器+客户端 - C/C++ - 清泛网 - 专注C/C++及内核技术

...客户端 运行命令行为:Client.exe 127.0.0.1 8000 命令行参数别为要连接的IP地址和端口 //Client.cpp #include <winsock2.h> #include <stdio.h> #include <windows.h> //引入静态链接库 #pragma comment(lib,"ws2_32.lib") //缓冲区大小 #define BUFFER_SIZE 4096 ...
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What is a plain English explanation of “Big O” notation?

...me an O(N log(N)) algorithm takes." (fairly common) it's less than O(N1.000001), which you might be willing to call basically linear ... I ridiculously increase the time a O(2N) ("exponential time") algorithm takes." (you'd double (or triple, etc.) the time just by increasing the problem by a...
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How does the Windows Command Interpreter (CMD.EXE) parse scripts?

...able substring expansion) FOR /F "TOKENS=n" FOR /F "SKIP=n" FOR /L %%A in (n1 n2 n3) EXIT [/B] n Details for these rules may be found at Rules for how CMD.EXE parses numbers For anyone wishing to improve the cmd.exe parsing rules, there is a discussion topic on the DosTips forum where issues ca...