perl bible

[Root @ test download] #./check_memory.pl Can't locate Nagios/Plugin. pm in @ INC (@ INC contains: /usr/local/lib64/perl5/usr/local/share/perl5/usr/lib64/perl5/vendor_perl/usr/share/perl5/vendor_perl/usr/lib64/perl5/usr /share/perl5 .) at. /check_memory.pl line 26. BEGIN failed -- compilation aborted at./check_memory.pl line 26. Solution: [Root @ test download] # perl-MCPAN-e 'Install Nagios: plugin' [Root @ test download] #./check_memory.pl CHECK_MEM

This article mainly introduces the differences between the PHP extension modules Pecl, Pear, and Perl. For more information, see I. brief summary:Pear: a relatively standard for writing, a popular toolbox code set in foreign countries Pecl: php extension package, but not included in the basic extension scope of php Perl: a scripting language that appeared earlier than php. php draws on its regular expressio

Summary:1. Using built-in warning information2. Using the Perl Help documentDetails:1. Built-in warning information-Perl can warn you when there are "suspicious things" running in your program-The warning does not change the behavior of the program, just as an auxiliary hint to the programmer. The programmer is prompted when Perl's interpreter considers the code to be problematic, but does not prevent the p

Read standard input:foreach (The diamond operator The @argv array is checked first, and if it is empty, it is entered from the standard input stream. The value of the @ARGV can be from the command line, or you can assign a value yourself.The value of the./program Fred Barney Betty # @ARGV is three files after the command line.while (Standard output in Perl: Print. When you output multiple items, you can separate them by adding "," and enclose them in

due to a running error =; pay attention to this when calling by reference; In addition, you can use aliases to pass array parameters. When you call an array in the form of my_sub (@ array, perl copies all elements in the array @ array to the @ _ array of the subprogram. When the array @ array is large, this call method consumes resources and time, low efficiency; usableAlias TransferArray to avoid this copy operation, in order to directly operate

This article mainly introduces the true and false in-depth study in Perl, this article explains in detail the difference between the truth value and the false values in Perl, the need of friends can refer to the Perl considers truth values to be self-evident (self-evident), which means that the truth of any thing can be computed.

Tags: Zabbix mysql perl1.Yum Install Perl-libwww-perlYum Install Perl-file-whichYum Install Perl-dbd-mysqlYum Install PERL-DIGEST-SHA1Yum Install Perl-time-hiresYum Install Perl-crypt-ssleay2. Testing#!/usr/bin/

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

recently, I have been studying in some forums and communities to find out that many people have a lot of bias towards Perl. I've studied Perl for so long, and it's a little bit of experience, so I've summed up the reason why everyone is biased against Perl, and there are two reasons for the following two:1. Perl is qui

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

With the Perl environment under Linux, how do you develop Perl under Windows? Believe that many developers dream of things.This article teaches you to install the Perl plugin in eclipse, so let's follow the steps below.1. First install the Perl Environment under window:: http://www.activestate.com/activeperl/downloadsf

With the Perl environment under Linux, how do you develop Perl under Windows? Trust is something many developers dream of. This article teaches you to install the Perl plugin in eclipse, so let's follow the steps together. 1. First install the PERL environment under Windows: Download Address: Http://www.activestate.

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

The default Perl debugger is the perl interpreter, and a GUI debugger.Generally, telnet is used to access the server during development. This document describes the usage of the default command line debugger. Start the Perl interpreter with the-d command line option, for example, the perl-dtest.pl enters the interactio

1 Line PerlPerl, for today, has only one line of Perl programs.Perl is famous in a variety of programming languages, such as I, who often write Perl programs that I can't read.For example, the program in this document, although short, estimated one weeks later I think it will be dizzy. But this does not affect Perl as a powerful system management tool and system

[File handle] $| If Non-zero, force clear buffer after write or print operation on the currently selected file$% the current page number of the currently selected file handle$= the current page length of the currently selected file handle$-the remaining length of the page for the currently selected file handle$~ the name of the report format for the currently selected file handle$^ the current header format name for the currently selected file handle [Global variables] $_ default input and mo