what is in perl

Source:Http://www.cnblogs.com/itech/archive/2012/08/21/2649580.htmlPerl Object Oriented first let's look at three basic definitions of Perl object-oriented Programming: 1. An "object" refers to a simple reference that "has a way of knowing which

After a more comprehensive understanding of regular expressions, let's look at how to use regular expressions in perl,php, and javascript/"target=" _blank ">javascript. In general, Perl uses the following format for the expression: Operator/regular-

Variable scope(a) package variables$x = 1Here, $x is a package variable. There are 2 important things to know about package variables:1) If there is no other declaration, the variable is the package variable;2) package variables are always

Detailed explanation of the use of regular expressions (2 ). After a comprehensive understanding of regular expressions, let's take a look at how to use regular expressions in Perl, PHP, and JavaScripttarget_blankJavaScript. Generally, after a

Document directory MySciprt. pl (an example using MyModule) Zz from http://fanqiang.chinaunix.net/program/perl/2005-06-28/3349.shtml   Do you think the module documentation in perl is difficult? Okay, here is the simplest module in the world.

Windows Socket API usage experienceThis article is some of my experiences in MS-windows and HP-UNIX network programming. It is for your reference only. If the socket function mentioned in this article is not specifically described, it refers to the

Four basic data types in Perl (as far as I know): Scalar, array, list, and hash. Scalar should be the atomic Data Structure in Perl, which cannot be further decomposed by programmers, such as int and double in C language. For scalar, I have the

Common Perl Functions Command: PrintSyntax: Print filehandle listNote: This filehandle can be seen as a bridge between I (input) and O (output). You can use filehandle to read and write data. stdin indicates the connection from which data is input,

Perl object-oriented first let's take a look at the three basic definitions of Perl Object-Oriented Programming: 1. an "object" refers to a simple reference that "there is a way to know which class it belongs. (An object is a reference variable) 2.

Do you think the module documentation in Perl is somewhat difficult? Okay, here is the simplest module in the world. It will be used to demonstrate all the features of the (demonstrate) Exporter module. There is also a script for using this module.

Over the years, many programming languages and tools have supported regular expressions ,. net base class library contains a namespace and a series of classes that can fully utilize the power of Rule expressions, and they are also compatible with

   1. How to Implement socket programmingThe concept of Process Communication was initially derived from a standalone system. Since each process runs within its own address range, in order to ensure that two processes communicate with each other

Open a file using the Open () function Common methods to open a file are: Copy codeThe Code is as follows: open (FH, "Or die "Couldn't open $ filename for reading: $! "; The open () function usually has two parameters. The first is the file handle,

9 Regular Expressions in PerlThree forms of regular expressionsCommon patterns in regular expressions8 Principles of Regular expressionsRegular expressions are a major feature of the Perl language and a bit of a problem in Perl, but if you can

Over the years, many programming languages and tools have supported rule expressions ,. net base class library contains a namespace and a series of classes that can fully utilize the power of Rule expressions, and they are also compatible with

1. Numeric Operators: + (Plus),-(minus), * (multiplication),/(Division), ** (multiplication party/power), % (remainder );These operators mix integers, floating-point numbers, and real numbers. The calculation results are in the correct numeric

Perl Introduction Perl is a computer programming language with rich functions. It runs on more than 100 computer platforms and is widely used, from mainframe to portable devices, from rapid prototyping to large-scale scalable development. Perl was

Introduction to Perl Syntax Perl operators 1.Perl operator 1.1 Arithmetic operators Perl is very different in variables and data paradigms and C. However, its operator and C are almost identical, except for the example conversion operator type of

one. DataType (data type ):Perl's data types are roughly four: Scalar (variables), Scalar Array (array), hash array (hash), References (pointer), but they seem to be small but more than sufficient. In particular, you can write a Perl program without

from:http://www.lnmpblog.com/archives/323 To use the Distributed file system to reduce costs, we searched for open source Distributed file systems. After the installation of deployment and testing, I encountered in the use of some of the problems