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…
NAME perlembed – how to embed perl in your C program DESCRIPTION PREAMBLE Do you want to: Use C from Perl? Read perlxstut, perlxs, h2xs, perlguts, and perlapi. Use a Unix program from Perl? Read about back-quotes and about "system" and "exec" in perlfunc. Use Perl from Perl? Read about “do” in perlfunc and “eval”…
NAME perlebcdic – Considerations for running Perl on EBCDIC platforms DESCRIPTION An exploration of some of the issues facing Perl programmers on EBCDIC based computers. Portions of this document that are still incomplete are marked with XXX. Early Perl versions worked on some EBCDIC machines, but the last known version that ran on EBCDIC was…
NAME perldtrace – Perl’s support for DTrace SYNOPSIS #dtrace – Zn ‘perl::sub-entry, perl::sub-return { trace(copyinstr(arg0)) }’ dtrace : description ‘perl::sub-entry, perl::sub-return ‘ matched 10 probes #perl – E ‘sub outer { inner(@_) } sub inner { say shift } outer(“hello”)’ hello(dtrace output) CPU ID FUNCTION : NAME 0 75915 Perl_pp_entersub : sub – entry BEGIN…
NAME perldsc – Perl Data Structures Cookbook DESCRIPTION Perl lets us have complex data structures. You can write something like this and all of a sudden, you’d have an array with three dimensions! for my $x(1..10) { for my $y(1..10) { for my $z(1..10) { $AoA[$x][$y][$z] = $x * *$y + $z; } } }…
NAME perldos – Perl under DOS, W31, W95. SYNOPSIS These are instructions for building Perl under DOS (or w??), using DJGPP v2.03 or later. Under w95 long filenames are supported. DESCRIPTION Before you start, you should glance through the README file found in the top-level directory where the Perl distribution was extracted. Make sure you…
NAME perldoc – Look up Perl documentation in Pod format. SYNOPSIS perldoc[-h][-D][-t][-u][-m][-l][-U][-F] [-i][-V][-T][-r] [-d destination_file] [-o formatname] [-M FormatterClassName] [-w formatteroption:value] [-n nroff – replacement] [-X] [-L language_code] PageName | ModuleName | ProgramName | URL Examples: perldoc -f BuiltinFunction perldoc -L it -f BuiltinFunction perldoc -q FAQ Keyword perldoc -L fr -q FAQ Keyword perldoc…
NAME perldl – Simple shell for PDL (see also pdl2) SYNOPSIS Use PDL interactively: bash$ perldl pdl> $a = sequence(10) # or any other perl or PDL command bash$ pdl pdl> print "Hello, world! "; Run a script: bash$ cat > pdlscript #!/usr/bin/pdl print "Hello, world! "; … DESCRIPTION The program perldl is a simple…
NAME perldiag – various Perl diagnostics DESCRIPTION These messages are classified as follows (listed in increasing order of desperation): (W) A warning (optional). (D) A deprecation (enabled by default). (S) A severe warning (enabled by default). (F) A fatal error (trappable). (P) An internal error you should never see (trappable). (X) A very fatal error…
NAME perldgux – Perl under DG/UX. SYNOPSIS One can read this document in the following formats: man perldgux view perl perldgux explorer perldgux.html info perldgux to list some (not all may be available simultaneously), or it may be read as is: as README.dgux. DESCRIPTION Perl 5.7/8.x for DG/UX ix86 R4.20MU0x BUILDING PERL ON DG/UX Non-threaded…
NAME perldeprecation – list Perl deprecations DESCRIPTION The purpose of this document is to document what has been deprecated in Perl, and by which version the deprecated feature will disappear, or, for already removed features, when it was removed. This document will try to discuss what alternatives for the deprecated features are available. The deprecated…