how to learn perl

Symbol tableEach package has its own symbol table, which is a hash table. The keyword is the variable name, file handle, directory handle, and subroutine in the package. The value is typeglob. Each symbol is assigned a typeglob (* X), which indicates all types named X. Each package has its own symbol table. Whenever the package declaration is used, switch to the symbol table of the package. You can use the "package name + double colon (:) + variable name" method to access the variables of

Transfer from Forum: Http://club.topsage.com/thread-2468696-1-1.html Perl starts to use utf8 encoding internally to represent characters starting from 5.6. That is to say, there should be no problem in processing Chinese characters and other language characters. We only need to make good use of the encode module to make full use of the advantages of Perl utf8 characters.The following describes how to proces

One, List A list is a sequence of values enclosed in parentheses that can be any value or NULL, such as: (1, 5.3, "Hello", 2), empty list: (). Note: A list containing only one numeric value (for example: (43.2)) is different from the value itself (that is, 43.2), but they can be converted or assigned to each other. List example: Copy Code code as follows: ($var, "a string") (Num ($var 1 + $var 2) ($value, "The answer is $value") Second, array--the storage of

This article mainly introduces the Perl implementation of high watermark algorithm (to solve the multivalued comparison problem method), from the code examples can also learn to array traversal, function writing, function calls and other knowledge, the need for friends can refer to the "High watermark" algorithm: After the flood, the last wave subsided, the high waterline will indicate the highest water l

ajax|perl| Questions | Chinese Ajax, the latest very booming technology. There are a lot of ready-made development kits. At the beginning I tried the cpaint and supported php/asp. Not bad. It was later started with Perl Ajax: Cgi::ajax. By contrast, the discovery was very useful. The main feature is that the program automatically generates code that JavaScript invokes. In this way, we c

A brief description of http://www.perldoc.com/perl5.6/pod/perlmodlib.html for some common modules Use modules in Perl:Module: http://www.cpan.org/modules/01modules.index.htmlInstallation module:1. Perl makefile. pl2. Make3. Make Test4. Make installYou can also run the following command to install the module (the applicable system RedHat 9.0 is known. I don't know about other systems. Please try again.Perl-mcpan-e shell> Enter: Install model_name View

Some people must be using the WindowMe operating system !! As far as I use the Windows ME operating system, it is very simple to install apache + mysql + php4 + perl in the Windows ME environment. I will write down the installation strategy. Install apache first. you can download one from www.apache.org. After downloading, double-click to install phpmyadminApachemysql. Some people must be using the Window Me operating system !! As far as I use the W

1. variable name DefinitionPerl's common variables, hash variables, and array variables start with $, %, and @, respectively, and all PHP variables start with $, which seems to be more concise. In addition, the PHP hash array itself is already sorted. Perl needs to use tie: ixhash to obtain the hash array in the descending order. I personally feel that PHP variable names are better defined than Perl. 2. Nu

Windows 2000 + Apache + MySql + PHP3 + PHP4 + PERL installation and usage SummaryWww. 1000script.com 2002-9-3 1000script professional scriptWindows 2000 + Apache + MySql + PHP3 + PHP4 + PERL installation and usage Summary (1)There must be many friends who like me to try new things, especially when I hearWhen a new version of software is available, you can't wait to download a copy of it.I would like to disc

Perl, if purely just as a script function to write dozens of lines of code, implement small functions, with nodepad++, EditPlus is enough, if it is enterprise-class development, hundreds of PM modules, hundreds of thousands of lines of code debugging, with these editors is far from enough! At this point, the enterprise-class IDE has an advantage. Below in detail, under window use eclipse+epic+padwalker to build the

: main.pl Copy the code: #! / usr / bin / perl use strict; do 'seperate'; show (); seperate: sub show { print "Hello from seperate file! :-)"; } c. You can define a package in seperate and then call it in the current file: main.pl Copy the code: #! / usr / bin / perl use strict; do 'seperate'; Show :: show_sentence (); seperate: package Show; sub show_sentence () { print "Hello from seperate file! :

It is often seen that ruby and python are compared together. Some people say that ruby is more like a combination of perl and python, so ruby is more like python or perl? It is often seen that ruby and python are compared together. Some people say that ruby is more like a combination of perl and python, so ruby is more like python or

Perl Arrays a Perl array is a list variable that stores scalar values, and variables can be of different types. array variables begin with @. Access array elements are read using the $ + variable name + [index value] format. 1. Creating an array 1. The array variable starts with the @ symbol, and the element is enclosed in parentheses. 2. Begin defining the array as QW, the second array uses the qw//op

Http://developer.51cto.com/art/201007/213719.htm Http://www.ibm.com/developerworks/cn/linux/sdk/perl/culture-4/index.html Http://www.sdsc.edu/~moreland/courses/IntroPerl/docs/manual/pod/perldebug.html#NAME Http://www.pgsqldb.org/mwiki/index.php/PerlDebuger The default Perl debugger is the Perl interpreter itself, plus the graphical interface debugger. Because we

Perl use vs. require usage Contrast (i) Description:Both of these functions are a means of loading and referencing Perl's modules, or subroutines, The difference is that Perl use is found in the current default, and once the module is not in the specified area, it cannot be introduced using Perl First, the name introduced by

Shell is the basic operation of Linux, it must be learned. To learn a shell is to learn Linux commands. Perl has a strong regular expression support, very tough for text processing, playing Linux has to learn. python acts as an object-oriented, language that can be used as a Linux script to help you get your work done

Regular Expressions (Regular expression, abbreviated as Regexp,regex or REGXP), also known as regular expressions, regular expressions, or regular or normalized representations or formal representations, refer to a A single string that describes or matches a series of strings that conform to a certain syntactic rule. In many text editors or other tools, regular expressions are often used to retrieve and/or replace text content that conforms to a pattern. Many programming languages support the us

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. It will be used to demonstrate all the features of the (demonstrate) Exporter module. There is also a script for using this module. At the same time, we will also

I am very grateful to superor for taking his own time and providing the first Chinese video tutorial for the Chinese Perl community. It is a good tutorial in other languages. Compared with Perl, Perl is still relatively small. It is quite convenient to watch videos when getting started, just like watching movies. I have read almost every episode of superor. I hop

Advantages and disadvantages of Python and Perl, and advantages and disadvantages of pythonperl I. Comparison between Python and Perl (1) The initial purpose of designing a language determines the built-in functions of the language: Perl was initially created by Larry to format and process text, so there is a built-in regular expression. In python, a plural type