perlre – Perl regular expressions DescriptionThis page describes the syntax of regular expressions in Perl. If you haven’t used regular expressions before, a tutorial introduction is available in perlretut. If you know just a little about them, a quick-start introduction is available in perlrequick. Except for “The Basics” section, this page assumes you are familiar…
perlqnx – Perl version 5 on QNX DescriptionAs of perl5.7.2 all tests pass under: QNX 4.24G Watcom 10.6 with Beta/970211.wcc.update.tar.F socket3r.lib Nov21 1996.As of perl5.8.1 there is at least one test still failing. Some tests may complain under known circumstances. See below and hints/qnx.sh for more information. Under QNX 6.2.0 there are still a few…
perlpragma – how to write a user pragma DescriptionA pragma is a module which influences some aspect of the compile time or run time behaviour of Perl, such as "strict" or "warnings". With Perl 5.10 you are no longer limited to the built in pragmata; you can now create user pragmata that modify the behaviour…
perlport – Writing portable Perl DescriptionPerl runs on numerous operating systems. While most of them share much in common, they also have their own unique features. This document is meant to help you to find out what constitutes portable Perl code. That way once you make a decision to write portably, you know where the…
perlpolicy – Various and sundry policies and commitments related to the Perl core DescriptionThis document is the master document which records all written policies about how the Perl 5 Porters collectively develop and maintain the Perl core. GovernancePerl 5 PortersSubscribers to perl5-porters (the porters themselves) come in several flavours. Some are quiet curious lurkers, who…
perlpodstyle – Perl POD style guide DescriptionThese are general guidelines for how to write POD documentation for Perl scripts and modules, based on general guidelines for writing good UNIX man pages. All of these guidelines are, of course, optional, but following them will make your documentation more consistent with other documentation on the system. The…
perlpodspec – Plain Old Documentation: format specification and notes DescriptionThis document is detailed notes on the Pod markup language. Most people will only have to read perlpod to know how to write in Pod, but this document may answer some incidental questions to do with parsing and rendering Pod. In this document, “must” / “must…
perlpod – the Plain Old Documentation format DescriptionPod is a simple-to-use markup language used for writing documentation for Perl, Perl programs, and Perl modules. Translators are available for converting Pod to various formats like plain text, HTML, man pages, and more. Pod markup consists of three basic kinds of paragraphs: ordinary, verbatim, and command. Ordinary…
perlplan9 – Plan 9-specific documentation for Perl DescriptionThese are a few notes describing features peculiar to Plan 9 Perl. As such, it is not intended to be a replacement for the rest of the Perl 5 documentation (which is both copious and excellent). If you have any questions to which you can’t find answers in…
perlperf – Perl Performance and Optimization Techniques DescriptionThis is an introduction to the use of performance and optimization techniques which can be used with particular reference to perl programs. While many perl developers have come from other languages, and can use their prior knowledge where appropriate, there are many other people who might benefit from…
perlpacktut – tutorial on "pack" and "unpack" Description"pack" and "unpack" are two functions for transforming data according to a user-defined template, between the guarded way Perl stores values and some well-defined representation as might be required in the environment of a Perl program. Unfortunately, they’re also two of the most misunderstood and most often overlooked…
perlothrtut – old tutorial on threads in Perl DescriptionWARNING: This tutorial describes the old-style thread model that was introduced in release 5.005. This model is deprecated, and has been removed for version 5.10. The interfaces described here were considered experimental, and are likely to be buggy. For information about the new interpreter threads (“ithreads”) model,…
perlos400 – Perl version 5 on OS/400 This document needs to be updated, but we don’t know what it should say. Please email comments to perlbug [at] perl.org <mailto:perlbug [at] perl.org>. DescriptionThis document describes various features of IBM‘s OS/400 operating system that will affect how Perl version 5 (hereafter just Perl) is compiled and/or runs….
perlos390 – building and installing Perl for OS/390 and z/OS SynopsisThis document will help you Configure, build, test and install Perl on OS/390 (aka z/OS) Unix System Services. This document needs to be updated, but we don’t know what it should say. Please email comments to perlbug [at] perl.org <mailto:perlbug [at] perl.org>. DescriptionThis is a…
perlos2 – Perl under OS/2, DOS, Win0.3*, Win0.95 and WinNT. SynopsisOne can read this document in the following formats: man perlos2 view perl perlos2 explorer perlos2.html info perlos2to list some (not all may be available simultaneously), or it may be read as is: either as README.os2, or pod/perlos2.pod. To read the .INF version of documentation…
perlopentut – simple recipes for opening files and pipes in Perl DescriptionWhenever you do I/O on a file in Perl, you do so through what in Perl is called a filehandle. A filehandle is an internal name for an external file. It is the job of the "open" function to make the association between the…
perlopenbsd – Perl version 5 on OpenBSD systems DescriptionThis document describes various features of OpenBSD that will affect how Perl version 5 (hereafter just Perl) is compiled and/or runs. OpenBSD core dumps from getprotobyname_r and getservbyname_r with ithreadsWhen Perl is configured to use ithreads, it will use re-entrant library calls in preference to non-re-entrant versions….
perlop – Perl operators and precedence DescriptionIn Perl, the operator determines what operation is performed, independent of the type of the operands. For example "$x + $y" is always a numeric addition, and if $x or $y do not contain numbers, an attempt is made to convert them to numbers first. This is in contrast to many…
perlootut – Object-Oriented Programming in Perl Tutorial DateThis document was created in February, 2011, and the last major revision was in February, 2013. If you are reading this in the future then it’s possible that the state of the art has changed. We recommend you start by reading the perlootut document in the latest stable…
perlobj – Perl object reference DescriptionThis document provides a reference for Perl’s object orientation features. If you’re looking for an introduction to object-oriented programming in Perl, please see perlootut. In order to understand Perl objects, you first need to understand references in Perl. See perlreftut for details. This document describes all of Perl’s object-oriented (OO)…