As Joel points out in Stack Overflow podcast #34, in C Programming Language (aka: K & R), there is mention of this property of arrays in C: a[5] == 5[a] Joel says that it's because of pointer arithmetic but I still don't understand. Why does a[5] == 5[a] ? The C standard defines the [] operator as follows: a[b] == *(a + b) Therefore a[5] will evaluate to: *(a + 5) and 5[a]
正如Joel在Stack Overflow podcast＃34中指出的那样，在C编程语言（aka：K＆R）中，提到了C： a[5] == 5[a] 乔尔说这是因为指针算术，但我仍然不明白。 为什么a[5] == 5[a] ？ C标准定义[]运算符如下： a[b] == *(a + b) 因此a[5]将评估为： *(a + 5) 和5[a]将评估为： *(5 + a) a是指向数组的第一个元素的指针。 a[5]是距a更远的5个元素的值，与*(a + 5) ，并且从小学数学我们知道这些数学是相等的（加法是可交换
Why is it that in a C# switch statement, for a variable used in multiple cases, you only declare it in the first case? For example, the following throws the error "A local variable named 'variable' is already defined in this scope". switch (Type) { case Type.A: string variable = "x"; break; case Type.B: string variable = "y";
为什么在C＃switch语句中，对于在多种情况下使用的变量，只能在第一种情况下声明它？ 例如，以下内容将引发错误“已在此范围内定义了一个名为'变量'的局部变量”。 switch (Type) { case Type.A: string variable = "x"; break; case Type.B: string variable = "y"; break; } 但是，根据逻辑，如果类型为Type.B ，则不应击中初始声明。 switch语句
Switch statement fallthrough is one of my personal major reasons for loving switch vs. if/else if constructs. An example is in order here: static string NumberToWords(int number) { string[] numbers = new string[] { "", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine" }; string[] tens = new string[] { "", "", "twenty", "thirty", "forty",
切换语句贯穿是我爱的switch与if/else if结构之间的个人主要原因之一。 下面是一个例子： static string NumberToWords(int number) { string[] numbers = new string[] { "", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine" }; string[] tens = new string[] { "", "", "twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty", "nin
Is there a way to fall through multiple case statements without stating case value: repeatedly? I know this works: switch (value) { case 1: case 2: case 3: //do some stuff break; case 4: case 5: case 6: //do some different stuff break; default: //default stuff break; } but I'd like to do something like this: switch (value) { ca
有没有办法通过多个案例陈述而没有陈述case value:反复？ 我知道这是有效的： switch (value) { case 1: case 2: case 3: //do some stuff break; case 4: case 5: case 6: //do some different stuff break; default: //default stuff break; } 但我想要做这样的事情： switch (value) { case 1,2,3: //Do Something break; case 4,5,6:
If I create a variable within a new set of curly braces, is that variable popped off the stack on the closing brace, or does it hang out until the end of the function? For example: void foo() { int c[100]; { int d[200]; } //code that takes a while return; } Will d be taking up memory during the code that takes a while section? No, braces do not act as a stack frame. In
如果我在一组新的花括号中创建一个变量，那么这个变量是从右花括号中的栈上弹出的，还是会一直拖到函数结束？ 例如： void foo() { int c[100]; { int d[200]; } //code that takes a while return; } 将d的过程中占用内存code that takes a while段？ 不，大括号不作为堆栈框架。 在C中，大括号只是表示一个命名范围，但是没有任何东西会被销毁，也不会在控制通过时弹出堆栈。 作为编写代码的程
You got some of these right, but whoever wrote the questions tricked you on at least one question: global variables -------> data (correct) static variables -------> data (correct) constant data types -----> code and/or data. Consider string literals for a situation when a constant itself would be stored in the data segment, and references to it would be embedded in the code loc
你有这些权利，但是谁写这些问题至少欺骗了你一个问题： 全局变量------->数据（正确） 静态变量------->数据（正确） 常数数据类型----->代码和/或数据。 当一个常量本身存储在数据段中时，考虑字符串文字，并且引用它将嵌入代码中 局部变量（在函数中声明和定义）-------->堆栈（正确） 在main函数中声明和定义的变量----->堆也堆栈（老师试图欺骗你） 指针（例如： char *arr ， int *arr ）----
Which C#/.NET Dependency Injection frameworks are worth looking into? And what can you say about their complexity and speed. edit (not by the author): There is a comprehensive list of IoC frameworks available at https://github.com/quozd/awesome-dotnet/blob/master/README.md#ioc: Castle Windsor - Castle Windsor is best of breed, mature Inversion of Control container available for .NET and Silv
哪些C＃/ .NET依赖注入框架值得研究？ 你可以说他们的复杂性和速度。 编辑 （不是作者）：https://github.com/quozd/awesome-dotnet/blob/master/README.md#ioc提供了一个完整的IoC框架列表： 温莎城堡 - 温莎城堡是.NET和Silverlight中最好的成熟的Inversion of Control容器 Unity - 轻量级可扩展依赖注入容器，支持构造函数，属性和方法调用注入 Autofac - 一个令人上瘾的.NET IoC容器 DryIoc - 简单，快速的全
除了Nesper和Microsoft StreamInsight之外，是否有任何与.Net兼容的CEP引擎/平台（即它具有.Net API）？ Rulecore has a language independent interface, so does StreamBase. In Rulecore you send events using a high level protocol (like http, WS, TCP/IP sockets) and encode the events in XML. Streambase is similar. But these two products are standalone servers. If you are looking for something to embedd
除了Nesper和Microsoft StreamInsight之外，是否有任何与.Net兼容的CEP引擎/平台（即它具有.Net API）？ Rulecore有一个独立于语言的界面，StreamBase也是如此。 在Rulecore中，您使用高级协议（如http，WS，TCP / IP套接字）发送事件，并使用XML编码事件。 Streambase类似。 但是这两个产品是独立的服务器。 如果您正在寻找嵌入到.net应用程序中的东西，您可能会发现很难找到一个好的解决方案。 只需看看Esper.net。 它
我们有办法模拟一个网络摄像头驱动程序，它将提供实时捕获的屏幕（每秒30帧），因为它的输出是？ This is one of several features of ManyCam (free). It is a virtual webcam driver through which you can stream your real webcam video (with optional real-time video effects), video or image files, or your full/partial desktop. Yes, just google video2webcam. It works quite well and will loop a video or pi
我们有办法模拟一个网络摄像头驱动程序，它将提供实时捕获的屏幕（每秒30帧），因为它的输出是？ 这是ManyCam（免费）的几个功能之一。 它是一个虚拟的网络摄像头驱动程序，通过它可以将真实的网络摄像头视频（具有可选的实时视频效果），视频或图像文件，或全部/部分桌面。 是的，只是谷歌video2webcam。 它工作得很好，会将视频或图片循环播放。 驱动程序的工作是提供软件和硬件之间的抽象级别。 驱动程序应该向硬件发
Out of curiosity I was trying to generate a tail call opcode using C#. Fibinacci is an easy one, so my c# example looks like this: private static void Main(string[] args) { Console.WriteLine(Fib(int.MaxValue, 0)); } public static int Fib(int i, int acc) { if (i == 0) { return acc; } return Fib(i - 1, acc + i); } If I
出于好奇，我试图用C＃生成一个尾部调用操作码。 斐波纳契很容易，所以我的c＃示例如下所示： private static void Main(string[] args) { Console.WriteLine(Fib(int.MaxValue, 0)); } public static int Fib(int i, int acc) { if (i == 0) { return acc; } return Fib(i - 1, acc + i); } 如果我在发布版本中构建它并在不进行调试的情况下