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Frequently Asked Questions (FAQS);faqs.431
Some questions in this group aren't really about Perl, but rather
about system-specific issues. You might also consult the Most
Frequently Asked Questions list in comp.unix.questions for answers
to this type of question.
The current version of perl is 4.035 (version 4, patchlevel 35).
There haven't actually been 35 updates to perl4; rather, the context
diffs posted to the net have been broken up into 35 news-digestable
chunks.
This list is maintained by Tom Christiansen, and is archived on
convex.com [130.168.1.1] in the file pub/perl/info/faq. If you
have any suggested additions or corrections to this article, please
send them to Tom at either <tchrist@convex.com> or <convex!tchrist>.
Special thanks to Larry Wall for periodically reviewing this list for
accuracy and especially for writing and releasing Perl in the first place.
--
Tom Christiansen tchrist@convex.com convex!tchrist
I already have too much problem with people thinking the efficiency of
a perl construct is related to its length. On the other hand, I'm
perfectly capable of changing my mind next week... :-) --lwall
Xref: bloom-picayune.mit.edu news.answers:4267 comp.lang.perl:14078
Newsgroups: news.answers,comp.lang.perl
Path: bloom-picayune.mit.edu!enterpoop.mit.edu!usc!cs.utexas.edu!wupost!news.utdallas.edu!convex!tchrist
From: Tom Christiansen <tchrist@convex.COM>
Subject: comp.lang.perl FAQ (part 1 of 2)
Originator: tchrist@pixel.convex.com
Sender: usenet@news.eng.convex.com (news access account)
Message-ID: <1992Nov30.125050.8928@news.eng.convex.com>
Approved: news-answers-request@MIT.Edu
Date: Mon, 30 Nov 1992 12:50:50 GMT
Reply-To: tchrist@convex.COM (Tom Christiansen)
References: <1992Nov30.124619.8579@news.eng.convex.com>
Nntp-Posting-Host: pixel.convex.com
Organization: Convex Computer Corporation, Colorado Springs, CO
Followup-To: comp.lang.perl
X-Disclaimer: This message was written by a user at CONVEX Computer
Corp. The opinions expressed are those of the user and
not necessarily those of CONVEX.
Lines: 860
Archive-name: perl-faq/part1
Version: $Id: perl-info,v 1.2 92/11/30 05:22:33 tchrist Exp Locker: tchrist $
This posting contains answers to general information questions,
mostly of a non-technical nature. The following questions are
answered:
1.1) What is Perl?
1.2) Is Perl hard to learn?
1.3) Should I program everything in Perl?
1.4) Where can I get Perl over the Internet?
1.5) Where can I get Perl via Email?
1.6) How can I get Perl via UUCP?
1.7) Where can I get more information on Perl?
1.8) Can people who aren't on USENET receive comp.lang.perl as a digest?
1.9) Are archives of comp.lang.perl available?
1.10) How do I get Perl to run on machine FOO?
1.11) Where can I get (info|inter|ora|sql|syb)perl?
1.12) There's an a2p and an s2p; why isn't there a p2c (perl-to-C)?
1.13) Where can I get undump for my machine?
1.14) Where can I get a perl-mode for emacs?
1.15) How can I use Perl interactively?
1.16) Is there a Perl shell?
1.17) Is there a Perl profiler?
1.18) Is there a yacc for Perl?
1.19) How can I use curses with perl?
1.20) How can I use X with Perl?
1.21) What is perl4? What is perl5?
1.22) How does Perl compare with languages like REXX or TCL?
1.23) Is it a Perl program or a Perl script?
1.24) What's the difference between "Perl" and "perl"?
1.25) What companies use or ship Perl?
1.26) Is there commercial, 3rd-party support for Perl?
1.27) Where can I get a list of the JAPH signature quotes?
1.28) Where can I get a list of Larry Wall witticisms?
1.29) Is there a pretty-printer for Perl?
1.1) What is Perl?
A programming language, by Larry Wall <lwall@netlabs.com>.
Here's the beginning of the description from the man page:
Perl is an interpreted language optimized for scanning arbitrary text
files, extracting information from those text files, and printing reports
based on that information. It's also a good language for many system
management tasks. The language is intended to be practical (easy to use,
efficient, complete) rather than beautiful (tiny, elegant, minimal). It
combines (in the author's opinion, anyway) some of the best features of C,
sed, awk, and sh, so people familiar with those languages should have
little difficulty with it. (Language historians will also note some
vestiges of csh, Pascal, and even BASIC-PLUS.) Expression syntax
corresponds quite closely to C expression syntax. Unlike most Unix
utilities, Perl does not arbitrarily limit the size of your data--if
you've got the memory, Perl can slurp in your whole file as a single
string. Recursion is of unlimited depth. And the hash tables used by
associative arrays grow as necessary to prevent degraded performance.
Perl uses sophisticated pattern matching techniques to scan large amounts
of data very quickly. Although optimized for scanning text, Perl can also
deal with binary data, and can make dbm files look like associative arrays
(where dbm is available). Setuid Perl scripts are safer than C programs
through a dataflow tracing mechanism which prevents many stupid security
holes. If you have a problem that would ordinarily use sed or awk or sh,
but it exceeds their capabilities or must run a little faster, and you
don't want to write the silly thing in C, then Perl may be for you. There
are also translators to turn your sed and awk scripts into Perl scripts.
1.2) Is Perl hard to learn?
No, Perl is easy to learn for two reasons.
The first reason is that most of Perl is derived from existing tools
and languages, ones that many people who turn to Perl already have
some familiarity with. These include the C programming language, the
UNIX C library, the UNIX shell, sed, and awk. If you already know
these somewhat, Perl should be very easy for you.
The second reason that Perl is easy to learn is that you don't have to
know every thing there is to know about it in order to get good use
out of it. In fact, just a very small subset, mostly borrowed from C,
the shell, and sed, will be enough for most tasks. As you feel the
need or desire to use more sophisticated features (such as C
structures or networking), you can learn these as you go. The
learning curve for Perl is not a steep one, especially if you have
the headstart of having a background in UNIX. Rather, its learning
curve is gentle and gradual, but it *is* admittedly rather long.
If you don't know C or UNIX at all, it'll be a steeper learning curve,
but what you then learn from Perl will carry over into other areas,
like using the C library, UNIX system call, regular expressions, and
associative arrays, just to name a few. To know Perl is to know
UNIX, and vice versa.
1.3) Should I program everything in Perl?
Of course not. You should choose the appropriate tool for the task at
hand. While it's true that the answer to the question "Can I do (some
arbitrary task) in Perl?" is almost always "yes", that doesn't mean
this is necessarily a good thing to do. For many people, Perl serves
as a great replacement for shell programming. For a few people, it
also serves as a replacement for most of what they'd do in C. But
for some things, Perl just isn't the optimal choice, such as tasks
requiring very complex data structures.
1.4) Where can I get Perl over the Internet?
From any comp.sources.misc archive. Initial sources were posted to
Volume 18, Issues 19-54 at patchlevel 3. The Patches 4-10 were posted
to Volume 20, Issues 56-62. You can use the archie server
(see the alt.sources FAQ in news.answers) for ways to find these.
These machines, at the very least, definitely have it available for
anonymous FTP:
ftp.uu.net 137.39.1.2
archive.cis.ohio-state.edu 128.146.8.52
jpl-devvax.jpl.nasa.gov 128.149.1.143
ftp.netlabs.com 192.94.48.152
prep.ai.mit.edu 18.71.0.38
ftp.cs.ruu.nl 131.211.80.17 (Europe)
1.5) Where can I get Perl via Email?
If you are in Europe, you might using the following site. (I'm still
looking for a domestic site.) This information thanks to "Henk P.
Penning" <henkp@cs.ruu.nl>: One automated fashion is as follows:
Email: Send a message to 'mail-server@cs.ruu.nl' containing:
begin
path your_email_address
send help
send PERL/INDEX
end
The path-line may be omitted if your message contains a normal From:-line.
You will receive a help-file and an index of the directory that contains
the Perl stuff.
If all else fails, mail to Larry usually suffices.
1.6) How can I get Perl via UUCP?
You can get it from the site osu-cis; here is the appropriate info,
thanks to J Greely <jgreely@cis.ohio-state.edu> or <osu-cis!jgreely>.
E-mail contact:
osu-cis!uucp
Get these two files first:
osu-cis!~/GNU.how-to-get.
osu-cis!~/ls-lR.Z
Current Perl distribution:
osu-cis!~/perl/4.0/kits@10/perl.kitXX.Z (XX=01-37)
How to reach osu-cis via uucp(L.sys/Systems file lines):
#
# Direct Trailblazer
#
osu-cis Any ACU 19200 1-614-292-5112 in:--in:--in: Uanon
#
# Direct V.32 (MNP 4)
# dead, dead, dead...sigh.
#
#osu-cis Any ACU 9600 1-614-292-1153 in:--in:--in: Uanon
#
# Micom port selector, at 1200, 2400, or 9600 bps.
# Replace ##'s below with 12, 24, or 96 (both speed and phone number).
#
osu-cis Any ACU ##00 1-614-292-31## "" \r\c Name? osu-cis nected \c GO \d\r\d\r\d\r in:--in:--in:
Uanon
Modify as appropriate for your site, of course, to deal with your
local telephone system. There are no limitations concerning the hours
of the day you may call.
Another possibility is to use UUNET, although they charge you
for it. You have been duly warned. Here's the advert:
Anonymous Access to UUNET's Source Archives
1-900-GOT-SRCS
UUNET now provides access to its extensive collection of UNIX
related sources to non- subscribers. By calling 1-900-468-7727
and using the login "uucp" with no password, anyone may uucp any
of UUNET's on line source collection. Callers will be charged 40
cents per minute. The charges will appear on their next tele-
phone bill.
The file uunet!/info/help contains instructions. The file
uunet!/index//ls-lR.Z contains a complete list of the files available
and is updated daily. Files ending in Z need to be uncompressed
before being used. The file uunet!~/compress.tar is a tar
archive containing the C sources for the uncompress program.
This service provides a cost effective way of obtaining
current releases of sources without having to maintain accounts
with UUNET or some other service. All modems connected to the
900 number are Telebit T2500 modems. These modems support all
standard modem speeds including PEP, V.32 (9600), V.22bis (2400),
Bell 212a (1200), and Bell 103 (300). Using PEP or V.32, a 1.5
megabyte file such as the GNU C compiler would cost $10 in con-
nect charges. The entire 55 megabyte X Window system V11 R4
would cost only $370 in connect time. These costs are less than
the official tape distribution fees and they are available now
via modem.
UUNET Communications Services
3110 Fairview Park Drive, Suite 570
Falls Church, VA 22042
+1 703 876 5050 (voice)
+1 703 876 5059 (fax)
info@uunet.uu.net
1.7) Where can I get more information on Perl?
We'll cover five areas here: USENET (where you're probably reading
this), publications, the reference guide, examples on the Internet,
and Perl instructional courses.
A. USENET
You should definitely read the USENET comp.lang.perl newsgroup or
mailing list for all sorts of discussions regarding the language,
bugs, features, history, humor, and trivia. In this respect, it
functions both as a comp.lang.* style newsgroup and also as a user
group for the language; in fact, there's a mailing list called
``perl-users'' that is bidirectionally gatewayed to the newsgroup; see
question #38 for details. Larry Wall is a very frequent poster here,
as well as many (if not most) of the other seasoned Perl programmers.
It's the best place for the very latest information on Perl.
B. PUBLICATIONS
If you've been dismayed by the ~80-page troffed Perl man page (or is
that man treatise?) you should look to ``the Camel Book'', written by
Larry and Randal L. Schwartz <merlyn@ora.com>, published as a Nutshell
Handbook by O'Reilly & Associates and entitled _Programming Perl_.
Besides serving as a reference guide for Perl, it also contains
tutorial material and is a great source of examples and cookbook
procedures, as well as wit and wisdom, tricks and traps, pranks and
pitfalls. The code examples contained therein are available via
anonymous FTP from ftp.uu.net in
/published/oreilly/nutshell/perl/perl.tar.Z for your retrieval.
Corrections and additions to the book can be found in the Perl man
page right before the BUGS section under the heading ERRATA AND
ADDENDA.
If you can't find the book in your local technical bookstore, the book
may be ordered directly from O'Reilly by calling 1-800-998-9938 if in
North America and 1-707-829-0515. The book's ISBN is 0-937175-64-1.
Autographed copies are *NO LONGER* available from TECHbooks --
you'll have to nab the authors in person if you want one. Larry
routinely carries around a camel stamp for just such an occasion.
Reasonably substantiated rumor has it that there will be another Perl
book out pretty soon, this one aimed more at beginners. Look for it
from ORA towards the beginning of 93.
Larry Wall has published a 3-part article on perl in Unix World
(August through October of 1991), and Rob Kolstad also had a 3-parter
in Unix Review (May through July of 1990). Tom Christiansen also has
a brief overview article in the trade newsletter Unix Technology
Advisor from November of 1989. You might also investigate "The Wisdom
of Perl" by Gordon Galligher from SunExpert magazine; April 1991
Volume 2 Number 4. The newest (Dec 92) Computer Language magazine
is also alleged to contain a cover article on Perl.
The USENIX LISA (Large Installations Systems Administration) Conference
have for several years now included many papers of tools written in
Perl. Old proceedings of these conferences are available; look in
your current issue of ";login:" or send mail to office@usenix.org
for further information.
C. INTERNET
For other examples of Perl scripts, look in the Perl source directory in
the eg subdirectory. You can also find a good deal of them on
archive.cis.ohio-state.edu in the pub/perl/scripts/ subdirectory.
Another source for examples, currently only for anonymous FTP, is on
convex.com [130.168.1.1]. This contains, amongst other things,
a copy of the newsgroup up through Aug 91, a text retrieval database
for the newsgroup, a rather old and short troff version of Tom Christiansen's
perl tutorial (this was the version presented at Washington DC USENIX),
and quite a few of Tom's scripts. You can look at the INDEX file
in /pub/perl/INDEX for a list of what's in that directory.
The Convex and Ohio State archives are mirrored on uunet
in /languages/perl/scripts-{convex,osu}.
D. REFERENCE GUIDE
A nice reference guide by Johan Vromans <jv@mh.nl> is also available;
It is distributed in LaTeX (source) and PostScript (ready to
print) forms. Obsolete versions may still be available in TeX and troff
forms, although these don't print as nicely. The official kit
includes both LaTeX and PostScript forms, and can be FTP'd from
ftp.cs.ruu.nl [131.211.80.17], file /pub/DOC/perlref-4.035.tar.Z.
The reference guide comes with the O'Reilly book in a nice, glossy
card format.
E. PERL COURSES
Various technical conferences, including USENIX, SUG, WCSAS, AUUG,
FedUnix, and Europen have been sponsoring tutorials of varying lengths
on Perl at their system administration and general conferences. You
might consider attending one of these. These classes are typically
taught by Tom Christiansen <tchrist@usenix.com>, although both Rob
Kolstad <kolstad@usenix.org> and Randal Schwartz <merlyn@ora.com> also
teach Perl on occasion. Special appearances by Tom, Rob, and/or
Randal may also be negotiated. Classes can run from one day up to a
week ranging over a wide range of subject matter (most are two or
three days), and can include lab time if you want; having lab time
with exercises is generally of great benefit. Send us mail if your
organization is interested in having a Perl class taught at your site.
1.8) Can people who aren't on USENET receive comp.lang.perl as a digest?
"Perl-Users" is the mailing list version of the comp.lang.perl
newsgroup. If you're not lucky enough to be on USENET you can post to
comp.lang.perl by sending to one of the following addresses. Which one
will work best for you depends on which nets your site is hooked into.
Ask your local network guru if you're not certain.
Internet: PERL-USERS@VIRGINIA.EDU
Perl-Users@UVAARPA.VIRGINIA.EDU
BitNet: Perl@Virginia
uucp: ...!uunet!virginia!perl-users
The Perl-Users list is bidirectionally gatewayed with the USENET
newsgroup comp.lang.perl. This means that VIRGINIA functions as a
reflector. All traffic coming in from the non-USENET side is
immediately posted to the newsgroup. Postings from the USENET side are
periodically digested and mailed out to the Perl-Users mailing list. A
digest is created and distributed at least once per day, more often if
traffic warrants.
All requests to be added to or deleted from this list, problems,
questions, etc., should be sent to:
Internet: Perl-Users-Request@Virginia.EDU
Perl-Users-Request@uvaarpa.Virginia.EDU
BitNet: Perl-Req@Virginia
uucp: ...!uunet!virginia!perl-users-request
Coordinator: Marc Rouleau <mer6g@VIRGINIA.EDU>
1.9) Are archives of comp.lang.perl available?
Yes, although they're poorly organized. You can get them from
the host ftp.cs.caltech.edu (131.215.128.204) in the directory
/pub/comp.lang.perl. The file is comp.lang.perl.tar.Z; this file
was last modified on February 15, 1992, and is 8.9 megabytes long.
These are currently stored in news- or MH-style format; there are
subdirectories named things like "arrays", "programs", "taint", and
"emacs". Unfortunately, only the first ~1600 or so messages have been
so categorized, and we're now up to almost 15000. Furthermore, even
this categorization was haphazardly done and contains errors.
A more sophisticated query and retrieval mechanism is desirable.
Preferably one that allows you to retrieve article using a fast-access
indices, keyed on at least author, date, subject, thread (as in "trn")
and probably keywords. Right now, the MH pick command works for this,
but it is very slow to select on 15000 articles.
If you're serious about this, your best bet is probably to retrieve
the compressed tarchive and play with what you get. Any suggestions
how to better sort this all out are extremely welcome.
Currently the comp.lang.perl archives on convex.com are nearly a year
behind. That's because I no longer have room to store them there. I
do have them all on-line still, but they are not publicly accessible.
If you have a special request for a query on the old newsgroup
postings, and make nice noises in my direction, I can run the query
and send them to you. Algebraic queries are like "find me anything
about this and that and the other thing but not this or whozits". I
hope to put this in the form of a mailserver. Donated software would
be fine. :-)
The fast text-retrieval query system for this I'm currently using is
Liam Quin's excellent lqtext system, available from ftp.cs.toronto.edu
in /pub/lq-text* .
Rumor has it that there are WAIS servers out there for comp.lang.perl
these days, but I haven't used them. Any information on these would
be appreciated.
1.10) How do I get Perl to run on machine FOO?
Perl comes with an elaborate auto-configuration script that allows Perl
to be painlessly ported to a wide variety of platforms, including many
non-UNIX ones. Amiga and MS-DOS binaries are available on
jpl-devvax.jpl.nasa.gov [128.149.1.143] for anonymous FTP. Try to bring
Perl up on your machine, and if you have problems, examine the README
file carefully, and if all else fails, post to comp.lang.perl;
probably someone out there has run into your problem and will be able
to help you.
In particular, since they're so often asked about, here's some information
for the MacIntosh from Matthias Ulrich Neeracher <neeri@iis.ethz.ch>:
A port of Perl to the Apple Macintosh is available by anonymous
ftp to wuarchive.wustl.edu [128.252.135.4] from the file
/mirrors2/rascal.ics.utexas.edu/programming/Perl_402_MPW_CPT_bin .
You can also get it from Host gatekeeper.dec.com [16.1.0.2]
in /.9/plan/perl/macperl/Perl_402_MPW_CPT_bin .
The file is 1.1M and must be transferred in BINARY mode. Please
be considerate of the archive sites' users during CDT working hours.
(And, no, there is no way to get it by email).
For European users, the file should soon appear on lth.se.
To make optimal use of all the features of this port, you
should have MPW, ToolServer, and 5M of memory. There is also a
standalone version included, but it's currently of very limited
usefulness.
This package contains all of the sources for compilation with
MPW C 3.2
Here's more, from Timothy Murphy <tim@maths.tcd.ie >
I ported perl to the Mac, using Think C, a while ago. I've
used it quite a lot since without problems.
It is available from ftp.maths.tcd.ie in pub/Mac/perl.hqx .
The source (as diffs from the standard source) is in the
subdirectory pub/Mac/perl-4.035 .
A Mac version of patch is also available in pub/Mac/patch.hqx
with source in pub/Mac/patch-2.0 . Various other Mac ports of
GNU programs can be found in the same place.
They all use a small "ThinkCPosix" library containing various
Unix-like functions, which again can be found in the same
place.
And here's some VMS information from Rao V. Akella
<rao@moose.cccs.umn.edu>: (this appears to be an old port)
You can pick up Perl for VMS (version 3.0.1.1 patchlevel 4) via
anonymous ftp from ftp.pitt.edu [130.49.253.1] in the
software/vms/perl subdirectory (there are two files there:
perl-pl18.bck and perl-pl4.bck).
There is also a v3.018 on info.rz.uni-ulm.de [134.60.1.125] or
vms.huji.ac.il [128.139.4.3] in /pub/VMS/misc (information courtesy
of Anders Rolff <rolff@scotty.eurokom.ie>).
And here is a recent version for MS-DOS from Budi Rahard
<rahard@ee.UManitoba.CA>, who says:
I am collecting MS-DOS Perl(s) in ftp.ee.umanitoba.ca directory
/pub/msdos/perl. Currently I received three versions of Perl v4.019
and one of 4.010. (Tommy Thorn <tthorn@daimi.aau.dk> and Len Reed
<holos0!lbr@gatech.edu>)
There is now a 4.035 for 386 [DOS], Hitoshi Doi <doi@jrd.december.com>
port, is available ftp.ee.umanitoba.ca as /pub/msdos/perl/perl386.zoo .
Please contact the porters directly in case of questions about
these ports.
1.11) Where can I get (info|inter|ora|sql|syb)perl?
Numerous database-oriented extensions to Perl have been written.
These amount to using the usub mechanism (see the usub/ subdirectory
in the distribution tree) to link in a database library, allowing
embedded calls to Informix, Interbase, Oracle, Ingres, and Sybase.
There is currently a project underway, organized by Buzz Moschetti
<buzz@bear.com>, to create a higher level interface (DBperl) that
will allow you to write your queries in a database-independent
fashion. If you're interested, send mail to
<perldb-interest-request@vix.com> about it.
Meanwhile, here are the authors of the various extensions:
What Target DB Who
-------- ----------- ----------------------------------------
Infoperl Informix Kurt Andersen (kurt@hpsdid.sdd.hp.com)
Interperl Interbase Buzz Moschetti (buzz@bear.com)
Oraperl Oracle Kevin Stock (kstock@encore.com)
Sqlperl Ingres Ted Lemon (mellon@ncd.com)
Sybperl Sybase Michael Peppler (mpeppler@itf.ch)
1.12) There's an a2p and an s2p; why isn't there a p2c (perl-to-C)?
Because the Pascal people would be upset that we stole their name. :-)
The dynamic nature of Perl's do and eval operators (and remember that
constructs like s/$mac_donald/$mac_gregor/eieio count as an eval) would
make this very difficult. To fully support them, you would have to put
the whole Perl interpreter into each compiled version for those scripts
using them. This is what undump does right now, if your machine has it.
If what you're doing will be faster in C than in Perl, maybe it should
have been written in C in the first place. For things that ought to be
written in Perl, the interpreter will be just about as fast, because the
pattern matching routines won't work any faster linked into a C program.
Even in the case of simple Perl programs that don't do any fancy evals, the
major gain would be in compiling the control flow tests, with the rest
still being a maze of twisty, turny subroutine calls. Since these are not
usually the major bottleneck in the program, there's not as much to be
gained via compilation as one might think.
1.13) Where can I get undump for my machine?
The undump program comes from the TeX distribution. If you have TeX, then
you may have a working undump. If you don't, and you can't get one,
*AND* you have a GNU emacs working on your machine that can clone itself,
then you might try taking its unexec() function and compiling Perl with
-DUNEXEC, which will make Perl call unexec() instead of abort(). You'll
have to add unexec.o to the objects line in the Makefile. If you succeed,
post to comp.lang.perl about your experience so others can benefit from it.
1.14) Where can I get a perl-mode for emacs?
In the perl4.0 source directory, you'll find a directory called
"emacs", which contains several files that should help you.
1.15) How can I use Perl interactively?
The easiest way to do this is to run Perl under its debugger.
If you have no program to debug, you can invoke the debugger
on an `empty' program like this:
perl -de 0
(The more positive amongst us prefer "perl -de 1". :-)
Now you can type in any legal Perl code, and it will be immediately
evaluated. You can also examine the symbol table, get stack
backtraces, check variable Values, and if you want to, set
breakpoints and do the other things you can do in a symbolic debugger.
1.16) Is there a Perl shell?
Not really. Perl is a programming language, not a command
interpreter. There is a very simple one called "perlsh"
included in the Perl source distribution. It just does this:
$/ = ''; # set paragraph mode
$SHlinesep = "\n";
while ($SHcmd = <>) {
$/ = $SHlinesep;
eval $SHcmd; print $@ || "\n";
$SHlinesep = $/; $/ = '';
}
Not very interesting, eh?
Daniel Smith <dansmith@autodesk.com> is working on an interactive Perl
shell called SoftList. It's currently at version 3.0beta. SoftList
3.0 has tcsh-like command line editing, can let you define a file of
aliases so that you can run chunks of perl or UNIX commands, and so
on. You can send mail to him for further information and availability.