Why exactly malloc is used?

This question already has an answer here: Difference between declared string and allocated string 3 answers char *strarray[5]; will allocate array of five pointers to the characters (which can be interpreted as strings). What this will not allocate is the memory space to place these five strings to. So, if you want to make all pointers to point to the different strings, you need to allocat

为什么使用malloc?

这个问题在这里已经有了答案: 声明字符串和分配字符串3个答案之间的区别 char *strarray[5]; 将分配五个指针数组(可以解释为字符串)。 这不会分配的是放置这五个字符串的内存空间。 所以,如果你想让所有的指针指向不同的字符串,你需要自己分配它们。 但是,由于这些是指针,如果你不想分配的话,你并不需要分配任何东西。 这就是为什么你的第一个例子正在工作。 strarray[0]="hello"; 将使数组的第一

How to initialize a struct in accordance with C programming language standards

I want to initialize a struct element, split in declaration and initialization. This is what I have: typedef struct MY_TYPE { boolean flag; short int value; double stuff; } MY_TYPE; void function(void) { MY_TYPE a; ... a = { true, 15, 0.123 } } Is this the way to declare and initialize a local variable of MY_TYPE in accordance with C programming language standards (C89, C90, C99,

如何根据C编程语言标准初始化结构

我想初始化一个struct元素,在声明和初始化中分割。 这是我拥有的: typedef struct MY_TYPE { boolean flag; short int value; double stuff; } MY_TYPE; void function(void) { MY_TYPE a; ... a = { true, 15, 0.123 } } 这是按照C编程语言标准(C89,C90,C99,C11等)来声明和初始化MY_TYPE的局部变量的MY_TYPE吗? 还是有什么更好的或至少有工作? 更新我结束了一个静态初始化元素,根据我的需要设置每

Regex to remove special/invisible characters

the problem is to remove some strange, characters from domain name, but keep special unicode characters such as accented letters (german, danish of polish language) For example: radisson-blu.es, you cant see, but there's additional char between ss. (Try to copy to notepad to see it). I've seen many posts about similar problems, but each solution doesn't remove that special characte

正则表达式去除特殊/不可见字符

问题是从域名中删除一些奇怪的字符,但保留特殊的Unicode字符,如重音字母(德语,波兰语丹麦语)例如:radisson-blu.es,你不能看到,但是ss之间有额外的字符。 (尝试复制到记事本,看看它)。 我见过很多关于类似问题的帖子,但是每个解决方案都不会删除该特殊字符,或者将其删除,但也需要保留其他特殊字符。 用空字符串替换正则表达式[^ws.,!@#$%^&*()=+~`-] 你(不)看到的角色是U + 00AD Soft Hyphen。 您可以

C# Web API HTML5 Audio Tag Seekable

Im playing around with the C# Web API and built a RESTfull API to access resources in my Database. What i want to achieve is a HTML5 Audio Tag is playing a mp3 loaded from the database. As the src attribute i make a request, and on the server i respond with a ByteArrayContent The MP3 is playing ... so far so good. Im displaying the controls of the audio tag, but i cant seek through the MP3.

C#Web API HTML5音频标签Seekable

我玩弄了C#Web API并构建了一个RESTfull API来访问我的数据库中的资源。 我想要实现的是一个HTML5音频标签正在播放从数据库加载的mp3。 作为我发出请求的src属性,并且在服务器上,我用ByteArrayContent响应 MP3播放...迄今为止非常好。 Im显示音频标签的控制,但我不能通过MP3寻找。 我的问题: 我是否为寻求服务正确的回应? 我需要提出一个范围的请求吗? 我是否需要任何JavaScript来寻找,还是我需要的音频标

How to make an XmlDocument respect HTML escape sequences

DISCLAIMER: Yes, I know the solution is not optimal, but it is what it is. We are creating a large XML file and then serving it via a WCF service. The consumer is a vendor that has a mobile gateway. They take the large file and chop it up for mobile calls. The actual creation bits use the Microsoft XML objects (XmlDocument, XmlElement, XmlTextNode, etc.) and then saved to the file system.

如何使XmlDocument尊重HTML转义序列

免责声明:是的,我知道这个解决方案并不是最佳的,但它就是这样。 我们正在创建一个大的XML文件,然后通过WCF服务来提供它。 消费者是拥有移动网关的供应商。 他们拿起大文件并将其切断以用于移动电话。 实际的创建位使用Microsoft XML对象(XmlDocument,XmlElement,XmlTextNode等),然后保存到文件系统。 该服务拉取文件并将其重新构建为XML文档并提供。 [OperationContract] [Description("Gets all products for S

How do I set the monitor orientation in Windows 7?

I want to write some fun code to flip the orientation upside down on Windows 7. See screen shot of the option I want to control. Here is the code I have: class Program { public const long WM_PAINT=0x0F; public const long WM_DISPLAYCHANGE=0x7E; [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)] public struct DEVMODE // taken from Win API { ... publi

如何在Windows 7中设置显示器方向?

我想写一些有趣的代码来颠倒Windows 7上的方向。请参阅我想控制的选项的屏幕截图。 这里是我有的代码: class Program { public const long WM_PAINT=0x0F; public const long WM_DISPLAYCHANGE=0x7E; [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Auto)] public struct DEVMODE // taken from Win API { ... public System.Windows.Forms.ScreenOrientation dmDisplayOrienta

Most Efficient Way Of Clearing Cache Using ASP.NET

I am building an ASP.NET/Umbraco powered website which is very custom data driven via entity framework, we are having to cache quite a lot of the data queries (For example searches by keyword) as it's a busy site. But when a user creates a new data entry, I need to clear all the cached queries (Searches etc..) so the new entry is available in the results. So in my create, delete and updat

使用ASP.NET清除缓存的最有效方法

我正在构建一个基于ASP.NET / Umbraco的网站,它是通过实体框架进行非常自定义的数据驱动的,我们不得不缓存大量的数据查询(例如通过关键字搜索),因为它是一个繁忙的网站。 但是当用户创建一个新的数据条目时,我需要清除所有的缓存查询(搜索等),以便新条目在结果中可用。 所以在我的创建,删除和更新方法,我打电话给以下方法: public static void ClearCacheItems() { var enumerator = HttpContext.Current.Ca

MVC 4.5 ignores value in model if a matching field is in URL or post data?

I saw some unexpected behavior this weekend. I created a super simple page to demonstrate MVC to someone who was learning it. It simply had two methods 'Index()' and '[HttpPost] Index(string text)' model contained one item, 'string Text {get;set;}' in Index() -the get, I created a model, and set the value of Text to "Enter some text" and returned View(model

如果匹配的字段位于URL或发布数据中,MVC 4.5会忽略模型中的值?

本周末我看到了一些意想不到的行为 我创建了一个超级简单的页面来向正在学习它的人演示MVC。 它只有两个方法'Index()'和'[HttpPost]索引(字符串文本)' 模型包含一个项目,'string Text {get; set;}' 在Index() - get,我创建了一个模型,并将Text的值设置为“Enter some text”并返回View(model) 在cshtml文件中,我有两个项目: @ Html.TextBoxFor(m => m.Text) 和 @ Model.

Can use interfaces in creating my models in Entity Framework Codefirst?

I'm new to Entity Framework and I'm practicing CodeFirst. My problem is I'm creating a model class and I want that class to inherit from two other classes. For example, an Employee has personal information such as first name,middle name,last name, and etc... it has also a contact information such as address,phone,email, and etc... Students also has those properties as well. The rea

可以在实体框架Codefirst中使用接口创建我的模型?

我是新来的实体框架,我正在练习CodeFirst。 我的问题是我正在创建一个模型类,我希望该类从其他两个类继承。 例如,员工拥有个人信息,例如名字,中间名,姓氏等......它还具有联系信息,例如地址,电话,电子邮件等......学生也具有这些属性。 我将这些信息分为两类的原因是,另一个实体也可以拥有联系信息,但没有个人信息,如公司,学校,医院,仓库等。 示例代码: public class ContactInfo { public s

Updating only part of a model

I'm using ASP.NET MVC 3 and Entity Framework Code First. I have a page (using Razor View Engine) which allows a user to update parts of a model (Product): @Html.LabelFor(model => model.Overview) @Html.TextAreaFor(model => model.Overview) @Html.LabelFor(model => model.Description) @Html.TextAreaFor(model => model.Description) @Html.HiddenFor(model => model.ProductId) My co

只更新模型的一部分

我使用ASP.NET MVC 3和实体框架代码优先。 我有一个页面(使用Razor View Engine),它允许用户更新模型(产品)的各个部分: @ Html.LabelFor(model => model.Overview)@ Html.TextAreaFor(model => model.Overview) @Html.LabelFor(model => model.Description) @Html.TextAreaFor(model => model.Description) @Html.HiddenFor(model => model.ProductId) 我的控制器方法如下所示: [HttpPost] publ