国产av人人妻人人爽,成人国内精品久久久久一区

Article Tags

Home

Technical Articles

php教程

grep (global search regular expression (RE) and print out the line, comprehensive search for regular expressions and print out the line) is a powerful text search tool that can use regular expressions to search for text and print out matching lines come out. The Unix grep family includes grep, egrep and fgrep. The egrep and fgrep commands are only slightly different from grep. egrep is an extension of grep and supports more re metacharacters. fgrep is fixed grep or fast grep, which treats all letters as words, that is,

Dec 13, 2016 pm 02:32 PM

grep

Detailed explanation of grep usage grep and regular expressions

Regular expressions are just a representation. As long as the tool supports this representation, the tool can process regular expression strings. vim, grep, awk, and sed all support regular expressions, and it is precisely because they support regular expressions that they are powerful; in the company I worked in before, because the company was a web-based service website (nginx), regular expressions were The demand is relatively large, so I spent some time studying regular rules, and I would like to share them with you:

Dec 13, 2016 pm 02:28 PM

grep

linux pipeline command grep

The grep command is used to find files whose content contains the specified template style. If the content of a file is found to match the specified template style, the default grep command will display the column containing the template style. If no file name is specified, or the file name given is "-", the grep command will read data from the standard input device.

Dec 13, 2016 pm 02:26 PM

grep

14 grep command usage examples

This article mainly introduces 14 grep command usage examples. This article explains how to find patterns in files, find patterns in multiple files, use the -l parameter to list the file names of files containing specified patterns, and use the -n parameter. Find the specified pattern in the file and display the line number of the matching line and other contents. Friends in need can refer to the following

Dec 13, 2016 pm 02:23 PM

Git's Patch function

Most software development in the UNIX world is collaborative, so Patch is a very important thing, because almost all ordinary contributors to large UNIX projects submit code through Patch. As one of the most important open source projects, Linux is also like this.

Dec 13, 2016 pm 02:16 PM

patch

Detailed explanation of linux grep command

grep (global search regular expression(RE) and print out the line, comprehensive search for regular expressions and print out the line) is a powerful text search tool that can use regular expressions to search for text and print out matching lines. come out. The Unix grep family includes grep, egrep and fgrep. The egrep and fgrep commands are only slightly different from grep. egrep is an extension of grep and supports more re metacharacters. fgrep is fixed grep or fast grep, which treats all letters as words, that is

Dec 13, 2016 pm 02:13 PM

linux grep command

The grep command in Linux system is a powerful text search tool. It can search text using regular expressions and print out the matching lines. The full name of grep is Global Regular Expression Print, which means the global regular expression version. Its usage permissions are for all users.

Dec 13, 2016 pm 02:00 PM

linux svn use

This article introduces the use of SVN under Linux in detail. I hope it can help everyone.

Dec 13, 2016 pm 01:52 PM

svn

Find common usage examples in Linux

This article describes Linux find usage examples

Dec 13, 2016 pm 01:49 PM

find command

About void main() in C language

Many people and even some books on the market use void main(), which is actually wrong. void main( ) has never been defined in C/C++. Bjarne Stroustrup, the father of C++, clearly stated in the FAQ on his homepage that The definition void main( ) { /* ... */ } is not and never has been C++, nor has it even been C.( void main ( ) never existed in C++ or C). Next, let me talk about the main function in the C and C++ standards respectively.

Dec 13, 2016 pm 01:26 PM

main void

void and void* in C/C++

The void keyword represents the concept of "empty type". However, the "empty type" here does not mean "any type", but means that it does not exist. That is to say, C/C++ does not allow you to write the statement void a, and there is no thing of type void.

Dec 13, 2016 pm 01:17 PM

Deeply understand the meaning of void and void pointers

This article provides a detailed analysis and introduction to the meaning of void and void pointers. Friends in need can refer to it

Dec 13, 2016 pm 01:15 PM

void

Detailed explanation of void and void*

Rules for using void keyword: 1. If the function has no return value, it should be declared as void type; 2. If the function has no parameters, then its parameters should be declared as void; 3. If the function parameters can be pointers of any type, then Its parameters should be declared as void *; 4. void cannot represent a real variable; void embodies an abstraction, and all variables in this world are "typed"

Dec 13, 2016 pm 01:14 PM