diff options
author | Perl 5 Porters <perl5-porters@africa.nicoh.com> | 1997-03-09 11:57:19 +1200 |
---|---|---|
committer | Chip Salzenberg <chip@atlantic.net> | 1997-03-09 11:57:19 +1200 |
commit | 68dc074516a6859e3424b48d1647bcb08b1a1a7d (patch) | |
tree | 125011c6d8e4a04727ff97166dc19199809958e4 /pod/perlfaq1.pod | |
parent | 699e6cd4da8c333ef83554732e73ab6734463b5d (diff) | |
download | perl-68dc074516a6859e3424b48d1647bcb08b1a1a7d.tar.gz |
[inseparable changes from match from perl-5.003_93 to perl-5.003_94]
BUILD PROCESS
Subject: Don't use db 2.x, we're not yet ready for it
From: Paul Marquess <pmarquess@bfsec.bt.co.uk>
Files: Configure
Subject: Warn if #! command is longer than 32 chars
From: Chip Salzenberg <chip@perl.com>
Files: Configure
Subject: patches re perl -wc install{perl,man}
Date: Tue, 11 Mar 97 13:13:16 GMT
From: Robin Barker <rmb1@cise.npl.co.uk>
Files: installman installperl
I got the new installhtml from CPAN
(TOMC/scripts/pod2html-v2.0beta.shar.gz)
I had problems getting the system call to splitpod at line 376 to work.
1. splitroot was not being found
2. splitroot was not finding its library
3. I changed htmlroot to podroot at line 175 to match the documentation.
p5p-msgid: 3180.9703270906@tempest.cise.npl.co.uk
private-msgid: 21544.9703111313@tempest.cise.npl.co.uk
Subject: 3_93 doesn't install pods
Date: Sun, 16 Mar 1997 02:21:35 -0500
From: Spider Boardman <spider@orb.nashua.nh.us>
Files: installperl
Msg-ID: 199703160721.CAA08339@Orb.Nashua.NH.US
(applied based on p5p patch as commit 43506a616735d616e03d277d64fbae1e864024bf)
Subject: When installing, use File::Copy instead of `cp`
From: Chip Salzenberg <chip@perl.com>
Files: installperl
Subject: Make hint files' warnings more visible
Date: Thu, 20 Mar 1997 23:18:03 +0100 (MET)
From: Hallvard B Furuseth <h.b.furuseth@usit.uio.no>
Files: hints/3b1.sh hints/apollo.sh hints/cxux.sh hints/dcosx.sh hints/dgux.sh hints/esix4.sh hints/freebsd.sh hints/hpux.sh hints/irix_4.sh hints/mips.sh hints/next_3_0.sh hints/os2.sh hints/qnx.sh hints/sco_2_3_3.sh hints/sco_2_3_4.sh hints/solaris_2.sh hints/ultrix_4.sh hints/utekv.sh
private-msgid: 199703202218.XAA09041@bombur2.uio.no
CORE LANGUAGE CHANGES
Subject: Defer creation of array and hash elements as parameters
From: Chip Salzenberg <chip@perl.com>
Files: dump.c global.sym mg.c op.c op.h perl.h pp.c pp_hot.c proto.h sv.c
Subject: New special literal: __PACKAGE__
From: Chip Salzenberg <chip@perl.com>
Files: keywords.pl pod/perldata.pod toke.c
Subject: Abort compilation at C<BEGIN{}> or C<use> after errors
From: Chip Salzenberg <chip@perl.com>
Files: op.c pod/perldiag.pod t/pragma/subs.t
Subject: allow C<substr 'hello', -10>
Date: Mon, 10 Mar 1997 15:55:44 -0800
From: David Dyck <dcd@tc.fluke.com>
Files: pp.c
Msg-ID: 97Mar10.155517pst.35716-2@gateway.fluke.com
(applied based on p5p patch as commit 77f720bf92f3d0100352416caeedd57936807ff2)
Subject: Regularize C<x % y>, esp. when y is negative
From: Chip Salzenberg <chip@perl.com>
Files: pp.c
Subject: Flush before C<flock(FOO, LOCK_UN)>
From: Chip Salzenberg <chip@perl.com>
Files: pod/perldelta.pod pod/perlfunc.pod pp_sys.c
Subject: Close loopholes in prototype mismatch warning
From: Chip Salzenberg <chip@perl.com>
Files: op.c sv.c toke.c
Subject: Warn on C<while ($x = each %y) {}>
From: Chip Salzenberg <chip@perl.com>
Files: op.c pod/perldiag.pod
Subject: Don't warn on C<print $fh func()>
From: Chip Salzenberg <chip@perl.com>
Files: toke.c
CORE PORTABILITY
Subject: Don't say 'static var = 1'
Date: Sun, 9 Mar 1997 15:19:57 +0200 (EET)
From: Jarkko Hietaniemi <jhi@iki.fi>
Files: malloc.c
private-msgid: 199703091319.PAA24714@alpha.hut.fi
Subject: HP/UX hint comments
Date: Fri, 21 Mar 1997 15:43:07 -0500 (EST)
From: Andy Dougherty <doughera@fractal.phys.lafayette.edu>
Files: hints/hpux.sh
private-msgid: Pine.SOL.3.95q.970321153918.28770B-100000@fractal.lafayette.
Subject: VMS update
Date: Tue, 11 Mar 1997 22:00:55 -0500 (EST)
From: Charles Bailey <bailey@hmivax.humgen.upenn.edu>
Files: lib/ExtUtils/MM_VMS.pm lib/Test/Harness.pm t/op/taint.t utils/perlbug.PL vms/descrip.mms
Msg-ID: 1997Mar11.220056.1873182@hmivax.humgen.upenn.edu
(applied based on p5p patch as commit 2b5725676da60b49978f38b85bb7f8ee20b4cb55)
Subject: vmsish.t and related patches
Date: Fri, 21 Mar 1997 01:32:47 -0500 (EST)
From: Charles Bailey <bailey@HMIVAX.HUMGEN.UPENN.EDU>
Files: MANIFEST perl.h vms/descrip.mms vms/ext/vmsish.t vms/vms.c
private-msgid: 01IGQW3IP1KK005VFB@hmivax.humgen.upenn.edu
Subject: Win32 update (four patches)
From: Gurusamy Sarathy <gsar@engin.umich.edu>
Files: MANIFEST README.win32 lib/AutoSplit.pm lib/Cwd.pm lib/ExtUtils/Command.pm lib/ExtUtils/Install.pm lib/ExtUtils/MM_OS2.pm lib/ExtUtils/MM_Unix.pm lib/ExtUtils/MM_Win32.pm lib/ExtUtils/MakeMaker.pm lib/ExtUtils/Mksymlists.pm lib/File/Basename.pm lib/File/Path.pm mg.c t/comp/cpp.t t/comp/script.t t/harness t/io/argv.t t/io/dup.t t/io/fs.t t/io/inplace.t t/lib/filehand.t t/lib/io_dup.t t/lib/io_sel.t t/lib/io_taint.t t/op/closure.t t/op/exec.t t/op/glob.t t/op/goto.t t/op/magic.t t/op/misc.t t/op/rand.t t/op/split.t t/op/stat.t t/op/sysio.t t/op/taint.t t/pragma/strict.t t/pragma/subs.t t/pragma/warning.t util.c win32/*
DOCUMENTATION
Subject: perlfaq.pod
Date: Mon, 17 Mar 1997 16:01:40 -0700
From: Tom Christiansen <tchrist@jhereg.perl.com>
Files: MANIFEST pod/Makefile pod/buildtoc pod/perl.pod pod/perlfaq*.pod pod/roffitall
private-msgid: 199703172301.QAA12566@jhereg.perl.com
Subject: *.pod changes based on the FAQ
Date: Mon, 17 Mar 1997 09:50:14 -0700 (MST)
From: Nat Torkington <gnat@frii.com>
Files: pod/perldata.pod pod/perlfunc.pod pod/perlipc.pod pod/perlop.pod pod/perlre.pod pod/perlrun.pod pod/perlsec.pod pod/perlvar.pod
Msg-ID: 199703171650.JAA02655@elara.frii.com
(applied based on p5p patch as commit 3c10ad8e31f7d77e71c048b1746912f41cb540f0)
Subject: Document that $. is not reset on implicit open
From: Chip Salzenberg <chip@perl.com>
Files: pod/perldelta.pod
Subject: Re: Embedding success with _93
Date: Tue, 11 Mar 1997 17:55:05 -0500
From: Doug MacEachern <dougm@opengroup.org>
Files: pod/perldelta.pod
Msg-ID: 199703112255.RAA22775@postman.osf.org
(applied based on p5p patch as commit 63a6ff3a1dc8d86edb4d8a7ec1548205e32a7114)
Subject: Patch to document illegal characters
Date: Fri, 14 Mar 1997 09:08:10 -0800 (PST)
From: Tom Phoenix <rootbeer@teleport.com>
Files: pod/perldiag.pod pod/perltrap.pod
private-msgid: Pine.GSO.3.96.970314090558.15346J-100000@kelly.teleport.com
Subject: Document trap with //o and closures
Date: Mon, 10 Mar 1997 18:08:08 -0500 (EST)
From: Charles Bailey <bailey@HMIVAX.HUMGEN.UPENN.EDU>
Files: pod/perltrap.pod
Msg-ID: 01IGCHWRNSEU00661G@hmivax.humgen.upenn.edu
(applied based on p5p patch as commit a54cb1465fdb400848f23705a6f130bb5c34ab70)
Subject: Illegal character in input
Date: Mon, 10 Mar 1997 15:21:21 -0800 (PST)
From: Tom Phoenix <rootbeer@teleport.com>
Files: pod/perldiag.pod
private-msgid: Pine.GSO.3.95q.970310151512.22489a-100000@kelly.teleport.com
Subject: Patch for docs Re: Lost backslash
Date: Wed, 19 Mar 1997 07:28:57 -0800 (PST)
From: Tom Phoenix <rootbeer@teleport.com>
Files: pod/perlop.pod
private-msgid: Pine.GSO.3.96.970319071438.24834G-100000@kelly.teleport.com
Subject: XSUB's doc fix
Date: Mon, 10 Mar 1997 11:42:06 -0500
From: Roderick Schertler <roderick@argon.org>
Files: pod/perlcall.pod pod/perlguts.pod pod/perlxstut.pod
Msg-ID: 28804.858012126@eeyore.ibcinc.com
(applied based on p5p patch as commit 5f43237038ea7a4151d3bf65aeeecd56ceb78a6a)
Subject: Document return from do FILE
Date: Tue, 18 Mar 1997 14:50:10 +0000
From: "M.J.T. Guy" <mjtg@cus.cam.ac.uk>
Files: pod/perlfunc.pod
Msg-ID: E0w70DK-0001yJ-00@ursa.cus.cam.ac.uk
(applied based on p5p patch as commit ba8d5fb439878113de8abc9b52d2af237d30fb3c)
Subject: Document $^M in perlvar
Date: Thu, 20 Mar 97 21:08:33 GMT
From: Robin Barker <rmb1@cise.npl.co.uk>
Files: pod/perlvar.pod
private-msgid: 6153.9703202108@tempest.cise.npl.co.uk
Subject: typos in pods of 5.003_93
Date: 19 Mar 1997 10:39:38 -0600
From: Jim Meyering <meyering@asic.sc.ti.com>
Files: pod/perlfunc.pod pod/perlguts.pod pod/perlre.pod pod/perltoot.pod pod/perlxs.pod
Msg-ID: wpgendbzvhx.fsf@asic.sc.ti.com
(applied based on p5p patch as commit 76a9873e006cf8f48f57062b2a0dd40b5ed45a95)
Subject: Re: Updates to pod punctuations
Date: Fri, 14 Mar 1997 17:00:12 -0500
From: Larry W. Virden <lvirden@cas.org>
Files: pod/*.pod
private-msgid: 9703141700.AA22911@cas.org
Subject: clarify example in perlfunc
Date: Thu, 20 Mar 1997 19:46:01 +0200 (EET)
From: Jarkko Hietaniemi <jhi@iki.fi>
Files: pod/perlfunc.pod
private-msgid: 199703201746.TAA25195@alpha.hut.fi
Subject: Regularize headings in DB_File documentation
From: Chip Salzenberg <chip@perl.com>
Files: ext/DB_File/DB_File.pm
LIBRARY AND EXTENSIONS
Subject: New module: autouse.pm
Date: Thu, 20 Mar 1997 19:34:30 -0500 (EST)
From: Ilya Zakharevich <ilya@math.ohio-state.edu>
Files: MANIFEST lib/autouse.pm
Msg-ID: 199703210034.TAA13469@monk.mps.ohio-state.edu
(applied based on p5p patch as commit 6757905eccb6dd0440ef65e8128a277a20f7d943)
Subject: Refresh DB_File to 1.12
Date: Wed, 12 Mar 97 15:51:14 GMT
From: Paul Marquess <pmarquess@bfsec.bt.co.uk>
Files: ext/DB_File/DB_File.pm ext/DB_File/DB_File.xs
Msg-ID: 9703121551.AA07435@claudius.bfsec.bt.co.uk
(applied based on p5p patch as commit b3deed9189f963e9994815307931f9084f60d1d9)
Subject: In File::Path, some systems can't remove read-only files
From: Chip Salzenberg <chip@perl.com>
Files: lib/File/Path.pm
Subject: Fix bugs revealed by prototype warnings
From: Chip Salzenberg <chip@perl.com>
Files: ext/Opcode/Opcode.pm lib/ExtUtils/MakeMaker.pm lib/Getopt/Long.pm
Subject: Problems with SKIP in makemaker
Date: Thu, 20 Mar 1997 23:13:31 -0500 (EST)
From: Ilya Zakharevich <ilya@math.ohio-state.edu>
Files: lib/ExtUtils/MM_Unix.pm
Msg-ID: 199703210413.XAA21601@monk.mps.ohio-state.edu
(applied based on p5p patch as commit 970322a2e8024294ada6e8d1a027cb98f1f48ee3)
Subject: In Exporter, don't C<require Carp> at file scope
From: Chip Salzenberg <chip@perl.com>
Files: lib/Exporter.pm
Subject: fix for Exporter's $SIG{__WARN__} handler
Date: Thu, 13 Mar 1997 18:40:51 -0500
From: Roderick Schertler <roderick@argon.org>
Files: lib/Exporter.pm
Msg-ID: 2282.858296451@eeyore.ibcinc.com
(applied based on p5p patch as commit 2768ea1aeef34f42d096f198fbe629c8374ca429)
Subject: Don't try to substr() refs in Carp
From: Chip Salzenberg <chip@perl.com>
Files: lib/Carp.pm
Subject: Re: NUL in die and other messages
Date: Fri, 21 Mar 1997 09:58:17 +0000
From: "M.J.T. Guy" <mjtg@cus.cam.ac.uk>
Files: lib/Carp.pm
Msg-ID: E0w815V-0005xs-00@ursa.cus.cam.ac.uk
(applied based on p5p patch as commit 52a267c574cb66c4bc35601dcf148a1d7a3bc557)
OTHER CORE CHANGES
Subject: Guard against buffer overflow in yyerror() and related funcs
From: Chip Salzenberg <chip@perl.com>
Files: toke.c
Subject: For bin compat, rename calllist() and he_{,delay}free
From: Chip Salzenberg <chip@perl.com>
Files: global.sym hv.c op.c perl.c pod/perlguts.pod proto.h
Subject: Fix C<print> on tied default handle
From: Chip Salzenberg <chip@perl.com>
Files: pp_hot.c
Subject: Fix C<local($a, undef, $b) = (1,2,3)>
From: Chip Salzenberg <chip@perl.com>
Files: op.c
Subject: Improve diagnostic on C<@a++>, C<--%a>, @a =~ s/a/b/
From: Chip Salzenberg <chip@perl.com>
Files: pp.c pp_hot.c
Subject: Don't warn on C<$x{y} .= "z"> when %x is tied
From: Chip Salzenberg <chip@perl.com>
Files: pp_hot.c
Subject: Eliminate 'unreachable code' warnings
From: Chip Salzenberg <chip@perl.com>
Files: ext/POSIX/POSIX.xs mg.c pp_ctl.c toke.c
Subject: printf format corrections for -DDEBUGGING
Date: Wed, 19 Mar 1997 12:42:50 -0500
From: Roderick Schertler <roderick@argon.org>
Files: doop.c malloc.c op.c pp_ctl.c regexec.c sv.c x2p/str.c x2p/util.c
Msg-ID: 26592.858793370@eeyore.ibcinc.com
(applied based on p5p patch as commit e125f273e351a19a92b69d6244af55abbbf0a26d)
Subject: Warn about missing -DMULTIPLICITY if likely a problem
Date: Wed, 19 Mar 1997 18:45:53 -0500
From: Doug MacEachern <dougm@opengroup.org>
Files: perl.c
Msg-ID: 199703192345.SAA15070@postman.osf.org
(applied based on p5p patch as commit 71aeea1753924e6e19c2461e241e3f7d8a570e90)
Diffstat (limited to 'pod/perlfaq1.pod')
-rw-r--r-- | pod/perlfaq1.pod | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/pod/perlfaq1.pod b/pod/perlfaq1.pod new file mode 100644 index 0000000000..2510a4b1f1 --- /dev/null +++ b/pod/perlfaq1.pod @@ -0,0 +1,248 @@ +=head1 NAME + +perlfaq1 - General Questions About Perl ($Revision: 1.10 $) + +=head1 DESCRIPTION + +This section of the FAQ answers very general, high-level questions +about Perl. + +=head2 What is Perl? + +Perl is a high-level programming language with an eclectic heritage +written by Larry Wall and a cast of thousands. It derives from the +ubiquitous C programming language and to a lesser extent from sed, +awk, the Unix shell, and at least a dozen other tools and languages. +Perl's process, file, and text manipulation facilities make it +particularly well-suited for tasks involving quick prototyping, system +utilities, software tools, system management tasks, database access, +graphical programming, networking, and world wide web programming. +These strengths make it especially popular with system administrators +and CGI script authors, but mathematicians, geneticists, journalists, +and even managers also use Perl. Maybe you should, too. + +=head2 Who supports Perl? Who develops it? Why is it free? + +The original culture of the pre-populist Internet and the deeply-held +beliefs of Perl's author, Larry Wall, gave rise to the free and open +distribution policy of perl. Perl is supported by its users. The +core, the standard Perl library, the optional modules, and the +documentation you're reading now were all written by volunteers. See +the personal note at the end of the README file in the perl source +distribution for more details. + +In particular, the core development team (known as the Perl +Porters) are a rag-tag band of highly altruistic individuals +committed to producing better software for free than you +could hope to purchase for money. You may snoop on pending +developments via news://genetics.upenn.edu/perl.porters-gw/ and +http://www.frii.com/~gnat/perl/porters/summary.html. + +While the GNU project includes Perl in its distributions, there's no +such thing as "GNU Perl". Perl is not produced nor maintained by the +Free Software Foundation. Perl's licensing terms are also more open +than GNU software's tend to be. + +You can get commercial support of Perl if you wish, although for most +users the informal support will more than suffice. See the answer to +"Where can I buy a commercial version of perl?" for more information. + +=head2 Which version of Perl should I use? + +You should definitely use version 5. Version 4 is old, limited, and +no longer maintained. Its last patch (4.036) was in 1992. The last +production release was 5.003, and the current experimental release for +those at the bleeding edge (as of 27/03/97) is 5.003_92, considered a beta +for production release 5.004, which will probably be out by the time +you read this. Further references to the Perl language in this document +refer to the current production release unless otherwise specified. + +=head2 What are perl4 and perl5? + +Perl4 and perl5 are informal names for different versions of the Perl +programming language. It's easier to say "perl5" than it is to say +"the 5(.004) release of Perl", but some people have interpreted this +to mean there's a language called "perl5", which isn't the case. +Perl5 is merely the popular name for the fifth major release (October 1994), +while perl4 was the fourth major release (March 1991). There was also a +perl1 (in January 1988), a perl2 (June 1988), and a perl3 (October 1989). + +The 5.0 release is, essentially, a complete rewrite of the perl source +code from the ground up. It has been modularized, object-oriented, +tweaked, trimmed, and optimized until it almost doesn't look like the +old code. However, the interface is mostly the same, and compatibility +with previous releases is very high. + +To avoid the "what language is perl5?" confusion, some people prefer to +simply use "perl" to refer to the latest version of perl and avoid using +"perl5" altogether. It's not really that big a deal, though. + +=head2 How stable is Perl? + +Production releases, which incorporate bug fixes and new functionality, +are widely tested before release. Since the 5.000 release, we have +averaged only about one production release per year. + +Larry and the Perl development team occasionally make changes to the +internal core of the language, but all possible efforts are made toward +backward compatibility. While not quite all perl4 scripts run flawlessly +under perl5, an update to perl should nearly never invalidate a program +written for an earlier version of perl (barring accidental bug fixes +and the rare new keyword). + +=head2 Is Perl difficult to learn? + +Perl is easy to start learning -- and easy to keep learning. It looks +like most programming languages you're likely to have had experience +with, so if you've ever written an C program, an awk script, a shell +script, or even an Excel macro, you're already part way there. + +Most tasks only require a small subset of the Perl language. One of +the guiding mottos for Perl development is "there's more than one way +to do it" (TMTOWTDI, sometimes pronounced "tim toady"). Perl's +learning curve is therefore shallow (easy to learn) and long (there's +a whole lot you can do if you really want). + +Finally, Perl is (frequently) an interpreted language. This means +that you can write your programs and test them without an intermediate +compilation step, allowing you to experiment and test/debug quickly +and easily. This ease of experimentation flattens the learning curve +even more. + +Things that make Perl easier to learn: Unix experience, almost any kind +of programming experience, an understanding of regular expressions, and +the ability to understand other people's code. If there's something you +need to do, then it's probably already been done, and a working example is +usually available for free. Don't forget the new perl modules, either. +They're discussed in Part 3 of this FAQ, along with the CPAN, which is +discussed in Part 2. + +=head2 How does Perl compare with other languages like Java, Python, REXX, Scheme, or Tcl? + +Favorably in some areas, unfavorably in others. Precisely which areas +are good and bad is often a personal choice, so asking this question +on Usenet runs a strong risk of starting an unproductive Holy War. + +Probably the best thing to do is try to write equivalent code to do a +set of tasks. These languages have their own newsgroups in which you +can learn about (but hopefully not argue about) them. + +=head2 Can I do [task] in Perl? + +Perl is flexible and extensible enough for you to use on almost any +task, from one-line file-processing tasks to complex systems. For +many people, Perl serves as a great replacement for shell scripting. +For others, it serves as a convenient, high-level replacement for most +of what they'd program in low-level languages like C or C++. It's +ultimately up to you (and possibly your management ...) which tasks +you'll use Perl for and which you won't. + +If you have a library that provides an API, you can make any component +of it available as just another Perl function or variable using a Perl +extension written in C or C++ and dynamically linked into your main +perl interpreter. You can also go the other direction, and write your +main program in C or C++, and then link in some Perl code on the fly, +to create a powerful application. + +That said, there will always be small, focused, special-purpose +languages dedicated to a specific problem domain that are simply more +convenient for certain kinds of problems. Perl tries to be all things +to all people, but nothing special to anyone. Examples of specialized +languages that come to mind include prolog and matlab. + +=head2 When shouldn't I program in Perl? + +When your manager forbids it -- but do consider replacing them :-). + +Actually, one good reason is when you already have an existing +application written in another language that's all done (and done +well), or you have an application language specifically designed for a +certain task (e.g. prolog, make). + +For various reasons, Perl is probably not well-suited for real-time +embedded systems, low-level operating systems development work like +device drivers or context-switching code, complex multithreaded +shared-memory applications, or extremely large applications. You'll +notice that perl is not itself written in Perl. + +The new native-code compiler for Perl may reduce the limitations given +in the previous statement to some degree, but understand that Perl +remains fundamentally a dynamically typed language, and not a +statically typed one. You certainly won't be chastized if you don't +trust nuclear-plant or brain-surgery monitoring code to it. And +Larry will sleep easier, too -- Wall Street programs not +withstanding. :-) + +=head2 What's the difference between "perl" and "Perl"? + +One bit. Oh, you weren't talking ASCII? :-) Larry now uses "Perl" to +signify the language proper and "perl" the implementation of it, +i.e. the current interpreter. Hence Tom's quip that "Nothing but perl +can parse Perl." You may or may not choose to follow this usage. For +example, parallelism means "awk and perl" and "Python and Perl" look +ok, while "awk and Perl" and "Python and perl" do not. + +=head2 Is it a Perl program or a Perl script? + +It doesn't matter. + +In "standard terminology" a I<program> has been compiled to physical +machine code once, and can then be be run multiple times, whereas a +I<script> must be translated by a program each time it's used. Perl +programs, however, are usually neither strictly compiled nor strictly +interpreted. They can be compiled to a bytecode form (something of a Perl +virtual machine) or to completely different languages, like C or assembly +language. You can't tell just by looking whether the source is destined +for a pure interpreter, a parse-tree interpreter, a byte-code interpreter, +or a native-code compiler, so it's hard to give a definitive answer here. + +=head2 What is a JAPH? + +These are the "just another perl hacker" signatures that some people +sign their postings with. About 100 of the of the earlier ones are +available from http://www.perl.com/CPAN/misc/japh . + +=head2 Where can I get a list of Larry Wall witticisms? + +Over a hundred quips by Larry, from postings of his or source code, +can be found at http://www.perl.com/CPAN/misc/lwall-quotes . + +=head2 How can I convince my sysadmin/supervisor/employees to use version (5/5.004/Perl instead of some other language)? + +If your manager or employees are wary of unsupported software, or +software which doesn't officially ship with your Operating System, you +might try to appeal to their self-interest. If programmers can be +more productive using and utilizing Perl constructs, functionality, +simplicity, and power, then the typical manager/supervisor/employee +may be persuaded. Regarding using Perl in general, it's also +sometimes helpful to point out that delivery times may be reduced +using Perl, as compared to other languages. + +If you have a project which has a bottleneck, especially in terms of +translation, or testing, Perl almost certainly will provide a viable, +and quick solution. In conjunction with any persuasion effort, you +should not fail to point out that Perl is used, quite extensively, and +with extremely reliable and valuable results, at many large computer +software and/or hardware companies throughout the world. In fact, +many Unix vendors now ship Perl by default, and support is usually +just a news-posting away, if you can't find the answer in the +I<comprehensive> documentation, including this FAQ. + +If you face reluctance to upgrading from an older version of perl, +then point out that version 4 is utterly unmaintained and unsupported +by the Perl Development Team. Another big sell for Perl5 is the large +number of modules and extensions which greatly reduce development time +for any given task. Also mention that the difference between version +4 and version 5 of Perl is like the difference between awk and C++. +(Well, ok, maybe not quite that distinct, but you get the idea.) If +you want support and a reasonable guarantee that what you're +developing will continue to work in the future, then you have to run +the supported version. That probably means running the 5.004 release, +although 5.003 isn't that bad (it's just one year and one release +behind). Several important bugs were fixed from the 5.000 through +5.002 versions, though, so try upgrading past them if possible. + +=head1 AUTHOR AND COPYRIGHT + +Copyright (c) 1997 Tom Christiansen and Nathan Torkington. +All rights reserved. See L<perlfaq> for distribution information. |