same file

To prevent the same file from being included multiple times, there are two methods in C/C ++: # ifndef and # pragma once. There is no big difference between compilers that support these two methods, but there are still some minor differences between

Frontend PHP namespace and PHP namespace* Directory [1] Definition [2] multi-namespace [3] name resolution [4] Access internal element [5] global space [6] alias and import the previous words In a broad sense, namespace is a way to encapsulate

[Namespace] namespace is the basis for using PHP namespaces. Bytes -------------------------------------------------------------------------------------------------- I. PHP namespace mainly solves three types of conflicts: constants, functions, and

PHP Advanced Programming Study Notes Namespace Overview PHP versions later than 5.3.0 support namespaces. What is a namespace? In a broad sense, namespace is a way to encapsulate things. This abstract concept can be seen in many places. In PHP, The

  1. the kernel uses three data structures to indicate opened files. The relationship between them determines the impact of one process on another process in file sharing.   (1) Each process has a record item (task_struct) in the progress table,

SVN quick tutorial This copy from the Web site: http://www.subversion.org.cn /? Action-viewnews-itemid-1 How to quickly create a Subversion server and use it in projects is a major concern for everyone. Compared with CVS, subversion has more options

GuideThere are two types of Linux links, one called hard links, and the other called Symbolic links (symbolic link). By default, the LN command produces a hard link. The difference between the hard link and the soft link fundamentally starts with

LN is another very important command in Linux, it is the function of a file in another location to establish a synchronized link, when we need to be in a different directory, the same file, we do not need to put the same file in each required

Shell BasicsFirst, Shell Overview1) The Shell is a command-line interpreter that provides the user with an interface system-level program that sends a request to the Linux kernel to run the program, allowing the user to start, suspend, stop, or even

BackgroundWhen dealing with some oversized files with the vim command, you sometimes encounter a deadlock and have to force the exit. However, when you use the VIM command again to access the file, a "e325:attention" prompt appears. If you do not

File descriptor When it comes to files and file systems, it's subconsciously thought that they exist on disk. However, the disk can only be passive storage, but can not take the initiative to process the files, to process the files, can only

I have been using C + + intermittently for a while. There are times when there is a feeling of complacency. Think of the C + + language features already know almost the same, there is nothing in the grammar of my place, now what to do is based on

After customers use our products, they find a problem: Disk space is not released after the file has been deleted. Is there a process in opening this file, or is there something else? Let's take a look at two scenesI. Scenario ONE: The process opens

ReasonHave to say in Windows download since the Thunderbolt has not considered what is BT or electric donkey download, in short, as long as there is nothing thunder, magnet, or ed2k all thrown into the Thunder, Europe, Of course, there are. Torrent

For the DUP and fork functions, the former copies a file descriptor, which is the copy process, and the associated file information is copied.First, for the DUPAs already known, for a process, there is a files_struct to manage all the relevant files,

The author of the unit this year has implemented the National Computer Application grade examination, according to the promotion job level different, examinee may choose 2 to 4 modules examination. Each examinee has the unique file number, the same

A PHP implementation of the ZIP file content comparison class and its usage, you can compare the contents of two zip files, return the new, deleted, and the same file list.PHP implementation of the ZIP file content comparison class. is a very useful

Each process has a TASK_STRUCT structure in the Linux kernel that maintains process-related information, known as a process descriptor, and in the operating system theory, the Process Control block (pcb,process). There is a pointer in the

Update log: V4: 1. Increased the calculation of the progress of the display; 2. Find a new version of the Md5sum.exe, there is no reliance on dynamic library. Tool One: Md5comv4.bat accepts two directory parameters, calculates the MD5 value of each

[Root@localhost ~]# Ls-l Total 152 -rw-r--r--1 root root 2915 08-03 06:16 A -RW-------1 root root 1086 07-29 18:35anaconda-ks.cfg ................................................ Line 1th: Total The number after total is the sum of space