I am trying to get PerlQT working on Debian Etch, which isn't in the
package tree. QT-Designer is, so it installs with no problem. PerlQT has
to be installed from source and it also works. That is, I can write a
perl script with QT bindings and the program runs fine.

But I can't get PerlQT noticed as a plugin by QT-Designer. When I start
QTD it should have project options for perl, but so far it only has the
usual C++ stuff.

Any QT experts on here?

Thanks
DS

This is an excerpt from the latest version perlfaq8.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .

--------------------------------------------------------------------

8.15: How do I set the time and date?

Assuming you're running under sufficient permissions, you should be able
to set the system-wide date and time by running the date(1) program.
(There is no way to set the time and date on a per-process basis.) This
mechanism will work for Unix, MS-DOS, Windows, and NT; the VMS
equivalent is "set time".

However, if all you want to do is change your time zone, you can
probably get away with setting an environment variable:

$ENV{TZ} = "MST7MDT"; # unixish
$ENV{'SYS$TIMEZONE_DIFFERENTIAL'}="-5" # vms
system "trn comp.lang.perl.misc";

--------------------------------------------------------------------

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perl provides good things and bad ones.

In the good thing, such as:
* it is adapted for text processing
* it is poorly typed
* it is enough powerful with unicode
* provide arrays and hash and reference (and objects)
* transparently manage any kind of numbers.
* is C interfacable
* has basic network and IPC possibilities
* pack/unpack

In the bad things, such as:
* bytes/unicode confusion
* stack overflow within bad regular expression
* memory consumption (might be an issue when energy will be more expensive?)
* insufficient typing
* some portability issue, notably with function «system».
* some $@%% issues.
* pack limitation: cannot just modify one byte.

perl6 looks like a cleanup of perl, but I am wondering:

This is an excerpt from the latest version perlfaq8.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .

--------------------------------------------------------------------

8.19: Why doesn't my sockets program work under System V (Solaris)? What does the error message "Protocol not supported" mean?

Some Sys-V based systems, notably Solaris 2.X, redefined some of the
standard socket constants. Since these were constant across all
architectures, they were often hardwired into perl code. The proper way
to deal with this is to "use Socket" to get the correct values.

Note that even though SunOS and Solaris are binary compatible, these
values are different. Go figure.

--------------------------------------------------------------------

Hello,

in the past I used Net::FTP for ftp and had no problems, however if I
try to connect to a ftp url like
ftp://ftp.gimp.org/ I can't connect?

$ftp = Net::FTP->new($url, Debug=>1 [, Passive=>1]) or die 'cannot
conect';

Any ideas what the problem is?

I have a large ksh script which had an embedded perl invocation to do
a character replace... to fix a date in a large flat file. I know the
script is inefficient, but I wanted to just improve the logic a bit
rather than have to install new scripts etc. Anyway, the file has
records that if start with the character "5" may need to have the date
replaced at position 70 in the file.

Here is the code snipet I have that works, except for one thing...

CMD="perl -p -i -n -e "'"s/^5(.{68})$EFF_DATE/5\$1|$REP_DATE/g"'"
$FILE"
eval $CMD

I don't want that "|" character, but I need something to separate the
$1 for the perl group and the $REP_DATE from the ksh. The $REP_DATE
gets replaced in ksh with the string 080407 for instance, so how does
one separate the $1 group from the string 080407?

This is an excerpt from the latest version perlfaq8.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .

--------------------------------------------------------------------

8.23: How can I open a pipe both to and from a command?

The IPC::Open2 module (part of the standard perl distribution) is an
easy-to-use approach that internally uses pipe(), fork(), and exec() to
do the job. Make sure you read the deadlock warnings in its
documentation, though (see IPC::Open2). See "Bidirectional Communication
with Another Process" in perlipc and "Bidirectional Communication with
Yourself" in perlipc

You may also use the IPC::Open3 module (part of the standard perl
distribution), but be warned that it has a different order of arguments
from IPC::Open2 (see IPC::Open3).

--------------------------------------------------------------------

This is an excerpt from the latest version perlfaq8.pod, which
comes with the standard Perl distribution. These postings aim to
reduce the number of repeated questions as well as allow the community
to review and update the answers. The latest version of the complete
perlfaq is at http://faq.perl.org .

--------------------------------------------------------------------

8.20: How can I call my system's unique C functions from Perl?

In most cases, you write an external module to do it--see the answer to
"Where can I learn about linking C with Perl? [h2xs, xsubpp]". However,
if the function is a system call, and your system supports syscall(),
you can use the syscall function (documented in perlfunc).

Remember to check the modules that came with your distribution, and CPAN
as well--someone may already have written a module to do it. On Windows,
try Win32::API. On Macs, try Mac::Carbon. If no module has an interface
to the C function, you can inline a bit of C in your Perl source with
Inline::C.

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