Perl class is a Perl Package First, create a package file named cocoa. PM (the extension PM is the default extension of the package, meaning perlmodule ). A module is a package, and a package is a class. Before doing other things, add the line "1;".
There are too many things on the computer (more than 300 GB space, as well as many things on the mobile hard disk, computer and hard disk are repeated), and I always want to clear it. This kind of active technology is not very high, the physical
I. file input/output functions
1. Basic I/O functions
Open: Allow programs to access files
Close: Terminate File Access
Print: file write string
Write: Write the formatting information to the file.
Printf: format the string and output it to the
Install the perl module in CentOS 5 to support IPV6
LWP: UserAgent is used in our product for http requests in perl code. The test shows that the following error is returned in a pure V6 environment:
Can't connect to [2001: db8: 0: 1: 10: 208: 135: 2
Perl reads and writes XML: The main is to write always forget how to engage ... first-read XML 1) XML instance " linux US mac US " windows US 2) Code Use file::basename; Use xml::simple; Use Data::D umper; My $xmlfile = DirName ($). "\\
This article will explain in detail how these functions are used. First, we introduce the listing file features of the Windows system-like dir command in the Python language, and then describe how to test whether a file name corresponds to a
This article will explain in detail how these functions are used. First, we describe the listing file functionality for the dir command in the Python language similar to the Windows system, and then describe how to test whether a file name
Reprinted from
Http://blog.163.com/skynjl/blog/static/603053922009127101558356/
Today, my colleague asked me to write a shell script. Although I am deeply influenced by * nix, it is annoying to execute sh scripts that are everywhere in *
1. For I in 'ls *. mp3'
Common Mistakes:
for i in `ls *.mp3`; do # Wrong!
Why is it wrong? Because the for... in statement is segmented by space, the file name containing space is split into multiple words. If you encounter 01-Don't eat the
As a beginner shell programmer, it is simple and practical to use shell commands, such as writing a few lines and performing some automated operations, but it involves logical control and
If/FI, Case/esac ...... And the weird Boolean judgment of
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