how to use void

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Linux C system error

The error in this article refers to an error that occurs when the code compiles a completely correct program to run, because there is no successful invocation of some system call functions in the program. Often these system call functions use a

Linux malloc analysis-from user space to kernel space

This article describes the implementation of malloc and its malloc in the heap expansion operation, and analyzes how the virtual address to the physical address is how to implement the mapping relationship.Ordeder Original, original link:

Encapsulation of Tcp_server and tcp_client functions in Linux network programming

The main purpose of this paper is to get the server sockets and client sockets, and make a simple package, using C language. Tcp_server Server-side FD acquisition is mainly divided into the following steps: 1. Create a socket, this step

Step 3 Nscache

NscacheIntroduced Nscache is an apple-provided class designed to do caching. Use is very similar to the Nsmutabledictionary is thread-safe Cache is automatically cleaned up when memory is low When the program starts, you can

Install VIM, simple Linux instructions

---restore content starts---Under Rootsudo apt-get update//Updatessudo apt-get install vim//installation vimCD ~ Go to home directorymkdir Creating a FolderTouch A.C Create a file A.CA before inserting the Shift+a line before the cursorI after

A detailed description of the hook function in the Linux kernel

The hook function, or hook function, is used when writing network modules in the Linux kernel. Now let's look at how Linux implements the hook function. Let's introduce a struct: struct Nf_hook_ops, which is the struct that implements the hook

CoreData the use of Nsmanagedobjectcontext under multi-threading

in Google, I found such a blog of two foreigners (,). The former is the introduction of Nsmanagedobjectcontext in the multi-threaded three kinds of design, the latter is the blogger on these three design performance test. Here's what I'll cover:1.

Go language Implementation Stack

Golangpackage stackimport  (     "errors") Type stack []interface{}func (Stack  *stack)  push (v interface{})  {    *stack = append (*Stack, V)}func (stack *stack)  pop ()   (interface{}, error) {    if len (*stack)  == 0 {         return nil, 

function pointers for @selector () and C + + in Objective-c

First look at the code used in Tomcat: //then start the animation//Put the picture in the Animationimages, accept the array parametersSelf.tom.animationImages =Arrayimage; //set the time interval, 81 graphs, the picture is a little longer than

Example of the iphone screen rotation

First on the interface builder put 6 Rectbutton, vertical, a row of three And we'll look at the code below. . h File Code 1// 2//AutoSizeViewController.h 3//AutoSize 4// 5//Created by Scott on 10-10-26. 6//Copyright __mycompanyname__. All

Use of the onclick and href in the a tag in HTML

The following code executes the SUBGO () function, Point me Here, javascript:void (0), does not have a substantial effect, it is just a dead link, the function that executes is subgo (). Point me with Point me Difference.In fact #包含了一个位置信息默认的锚是

A study of C + + pointers (i) Data pointers

pointers, which have always been very favored in the C + + language; A C + + application that does not use pointers is almost impossible to find. The address used to store data and programs, which is the basic function of pointers. Used to point to

The art of linked list--linux kernel chain list analysis

Introduction:A linked list is one of the important members of a data structure. Because of its simple structure, dynamic insertion, deletion of nodes, the advantages of less time, the list in the development of the application of many scenarios.

What does javascript:void (0) mean?

In JavaScript, Void is an operator that specifies that an expression is evaluated but does not return a value.The void operator uses the following format:1. javascript:void (expression)2. Javascript:void expressionExpression is a standard of

JS javascript:void (0) True meaning

I'd like to use Ajax for all the usual code like this:hereBut what is the meaning of void (0) here?In JavaScript, Void is an operator that specifies that an expression is evaluated but does not return a value.The void operator uses the following

Unity Editor Toolbar compiler extension

Http://www.cnblogs.com/zhaoqingqing/p/3812368.html1, apply to Prefab [apply the changes to Prefab]if (Guilayout.button ("Apply Collider to Prefab")) { Prefabutility.replaceprefab (Simactor.preview,

Javascript:void (0)

In JavaScript, Void is an operator that specifies that an expression is evaluated but does not return a value. The void operator uses the following format:1. javascript:void (expression)2. Javascript:void expressionExpression is a standard of

Methods in Java

Methods in JavaJava, as an object-oriented language, has the following characteristics: inheritance, encapsulation, polymorphism, abstraction, classes, objects, instances, methods, and overloads.The concept of Java methods is explained today.What is

PHP output caching detailed _php tips

Output control functions do not use header () or Setcookie (), send header information to affect, only for those similar to echo () and PHP code blocks of data have effect. Let's start with a simple example that gives you a general impression of

The understanding of Delegates in C #

1. Delegate Overview The delegate is a newly added type in C #. You can think of it as a type similar to class, and using a delegate requires two steps, first you define a delegate as if you were defining a class; then you can create one or more

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