Section 1: user commands and tools
NAME perlgit – Detailed information about git and the Perl repository DESCRIPTION This document provides details on using git to develop Perl. If you are just interested in working on a quick patch, see perlhack first. This document is intended for people who are regular contributors to Perl, including those with write access to the…
NAME perlfunc – Perl builtin functions DESCRIPTION The functions in this section can serve as terms in an expression. They fall into two major categories: list operators and named unary operators. These differ in their precedence relationship with a following comma. (See the precedence table in perlop.) List operators take more than one argument, while…
NAME perlfreebsd – Perl version 5 on FreeBSD systems DESCRIPTION This document describes various features of FreeBSD that will affect how Perl version 5 (hereafter just Perl) is compiled and/or runs. FreeBSD core dumps from readdir_r with ithreads When perl is configured to use ithreads, it will use re-entrant library calls in preference to non-re-entrant…
NAME perlform – Perl formats DESCRIPTION Perl has a mechanism to help you generate simple reports and charts. To facilitate this, Perl helps you code up your output page close to how it will look when it’s printed. It can keep track of things like how many lines are on a page, what page you’re…
NAME perlfork – Perl’s fork() emulation SYNOPSIS NOTE: As of the 5.8.0 release, fork() emulation has considerably matured. However, there are still a few known bugs and differences from real fork() that might affect you. See the "BUGS" and "CAVEATS AND LIMITATIONS" sections below. Perl provides a fork() keyword that corresponds to the Unix system…
NAME perlfilter – Source Filters DESCRIPTION This article is about a little-known feature of Perl called source filters. Source filters alter the program text of a module before Perl sees it, much as a C preprocessor alters the source text of a C program before the compiler sees it. This article tells you more about…
NAME perlfaq9 – Web, Email and Networking VERSION version 5.20190126 DESCRIPTION This section deals with questions related to running web sites, sending and receiving email as well as general networking. Should I use a web framework? Yes. If you are building a web site with any level of interactivity (forms / users / databases), you…
NAME perlfaq8 – System Interaction VERSION version 5.20190126 DESCRIPTION This section of the Perl FAQ covers questions involving operating system interaction. Topics include interprocess communication (IPC), control over the user-interface (keyboard, screen and pointing devices), and most anything else not related to data manipulation. Read the FAQs and documentation specific to the port of perl…
NAME perlfaq7 – General Perl Language Issues VERSION version 5.20190126 DESCRIPTION This section deals with general Perl language issues that don’t clearly fit into any of the other sections. Can I get a BNF/yacc/RE for the Perl language? There is no BNF, but you can paw your way through the yacc grammar in perly.y in…
NAME perlfaq6 – Regular Expressions VERSION version 5.20190126 DESCRIPTION This section is surprisingly small because the rest of the FAQ is littered with answers involving regular expressions. For example, decoding a URL and checking whether something is a number can be handled with regular expressions, but those answers are found elsewhere in this document (in…
NAME perlfaq5 – Files and Formats VERSION version 5.20190126 DESCRIPTION This section deals with I/O and the “f” issues: filehandles, flushing, formats, and footers. How do I flush/unbuffer an output filehandle? Why must I do this? (contributed by brian d foy) You might like to read Mark Jason Dominus’s “Suffering From Buffering” at <http://perl.plover.com/FAQs/Buffering.html> ….
NAME perlfaq4 – Data Manipulation VERSION version 5.20190126 DESCRIPTION This section of the FAQ answers questions related to manipulating numbers, dates, strings, arrays, hashes, and miscellaneous data issues. Data: Numbers Why am I getting long decimals (eg, 19.9499999999999) instead of the numbers I should be getting (eg, 19.95)? For the long explanation, see David Goldberg’s…
NAME perlfaq3 – Programming Tools VERSION version 5.20190126 DESCRIPTION This section of the FAQ answers questions related to programmer tools and programming support. How do I do (anything)? Have you looked at CPAN (see perlfaq2)? The chances are that someone has already written a module that can solve your problem. Have you read the appropriate…
NAME perlfaq2 – Obtaining and Learning about Perl VERSION version 5.20190126 DESCRIPTION This section of the FAQ answers questions about where to find source and documentation for Perl, support, and related matters. What machines support Perl? Where do I get it? The standard release of Perl (the one maintained by the Perl development team) is…
NAME perlfaq1 – General Questions About Perl VERSION version 5.20190126 DESCRIPTION This section of the FAQ answers very general, high-level questions about Perl. What is Perl? Perl is a high-level programming language with an eclectic heritage written by Larry Wall and a cast of thousands. Perl’s process, file, and text manipulation facilities make it particularly…
NAME perlfaq – Frequently asked questions about Perl VERSION version 5.20190126 DESCRIPTION The perlfaq comprises several documents that answer the most commonly asked questions about Perl and Perl programming. It’s divided by topic into nine major sections outlined in this document. Where to find the perlfaq The perlfaq is an evolving document. Read the latest…
tetris – A tetris game Synopsis perl tetris.pl Configuration The configuration file should be the file with name “.tetris” under HOME directory. Another option is using Tetris/Config.pm in any directory of @INC. Here is an example of configuration: # -*- perl -*- %Config = ( %Config, ‘start_level’ => 3, ‘down_step’ => 2, ‘keybindings’ => { %{$Config{keybindings}}, ord(‘j’) => \&move_left, ord(‘l’) => \&move_right, ord(‘k’) => \&rotate, ord(‘n’) => \&new_game, } ); push @$shapes, shape_from_string(<<SHAPE);…
NAME tetris – A tetris game SYNOPSIS perl tetris.pl CONFIGURATION The configuration file should be the file with name “.tetris” under HOME directory. Another option is using Tetris/Config.pm in any directory of @INC. Here is an example of configuration: # -*- perl -*- %Config = ( %Config, ‘start_level’ => 3, ‘down_step’ => 2, ‘keybindings’ => { %{$Config{keybindings}}, ord(‘j’) => \&move_left, ord(‘l’) => \&move_right, ord(‘k’) => \&rotate, ord(‘n’) => \&new_game, } ); push @$shapes,…
NAME perlexperiment – A listing of experimental features in Perl DESCRIPTION This document lists the current and past experimental features in the perl core. Although all of these are documented with their appropriate topics, this succinct listing gives you an overview and basic facts about their status. So far we’ve merely tried to find and…
NAME perlepoc – Perl for EPOC SYNOPSIS Perl 5 README file for the EPOC Release 5 operating system. INTRODUCTION EPOC is an OS for palmtops and mobile phones. For more information look at: <http://www.symbian.com/> This is a port of perl to the epocemx SDK by Eberhard Mattes, which itself uses the SDK by symbian. Essentially…