If
you have a question on how to do something in Perl, or
you need a Perl solution to an actual real-life problem, or
you're unsure why something you've tried just isn't working...
then this section is the place to ask. Post a new question!
However, you might consider asking in the chatterbox first (if you're a
registered user). The response time tends to be quicker, and if it turns
out that the problem/solutions are too much for the cb to handle, the
kind monks will be sure to direct you here.
I am not able to find anything to suite my needs.
The program needs to recieve data in realtime and plot them on a graph.
Idealy the graph should also be interactive, you should be able to click on it and set listeners.
I have found a very good module in python here https://matplotlib.org/ but unfortunately the script I am going to extend is written in perl.
I have also tried to install Inline::Python without success as I am running windows 10. Does anyone know of a perl library resembling matplotlib?
Hi monks. I want to search some function about fusion local & global. I want to use value on special loop. below is example. I want to use special value when only special condition is defined not always. Is there any fuction to meet my purpose?
my $test,$test2;
print "$test\n"; ## print nothing
if(not defined $test){ my $test = "GOOD"; print "$test\n"} ## print GO
+OD ( I need to define $test becasue I use $test at second "if" functi
+on only )
print "$test\n"; ## print nothing ( It is my purpose to print nothing
+so I cann't use global function at first "if" function )
if(not defined $test2){ print "$test\n" } # I want to print GOOD. GOOD
+ is defined on first "if" function. but It print nothing becuase I us
+e local function(my)
Perl CGI giving error while using Taint when uploading a file:
Insecure dependency in sysopen while running with -T switch at C:/Perl/site/lib/File/Temp.pm line 512.
Script works fine when Taint is not used in the shebang line. Error when Taint is on.
#!C:/Perl/bin/perl.EXE -wT
# CGI program to check Taint problem while uploading file. It prompts
# for the of the file to be uploaded and displays the name of the
# uploaded file.
# Tested in:
# OS Windows-7 32 bit, Perl 5.22.3, Apache 2.2
# OS WindowsServer-2012 64 bit, Perl 5.24.2, Apache 2.4.20
# OS Centos-6.10 64 bit, Perl 5.26.1, Apache 2.2.15
use strict; use warnings;
use CGI;
use CGI::Carp qw (fatalsToBrowser warningsToBrowser);
my $q = new CGI;
my $p_upl_new_file = $q->param ("p_upl_new_file") || '';
&sPrintForm; exit;
###################################################################
sub sPrintForm {
print $q->header ();
print $q->start_html ();
print $q->start_form ({-name => "form1"});
print $q->h1 ({-align => "center"} , "File Upload Test");
print "<br><br>";
print $q->filefield (-name => 'p_upl_new_file');
print "<br><br>";
print $q->submit (-name => "action_submit" , -value => "Submit");
print "<br><br>";
print "File name $p_upl_new_file";
print $q->end_form;
print $q->end_html;
}
# END #############################################################
I wrote this simple script after some reading online.
To achieve fastest execution time, I want to have the number of jobs == arraysize. (any array in script for looping repeating process)
I guess the other words, is instead of running stuff serially (one after the other), i have them in parallel to minimize time taken.
So in this case I wanna delete a directory, delete the directory1 in (/user/home/directory1/), but i am clueless why it does not work, all the files and subdirectories still there. Does the script automatically assign each files/subdirectories to each children?
Let me know if I have overlooked stuff. I am ready to learn . Thank you . :)
#! /usr/bin/perl
use Parallel::ForkManager;
$directory1 = "/user/home/directory1/";
my $pm = Parallel::ForkManager->new(10);
my @files = glob("$directory1/*");
my $number = scalar(@files);
for (my $i = 0; $i < $number; $i++) {
$pm->start and next;
system ("rm", "-fr", $files[i]);
exit(0);
$pm->finish;
}
$pm-> wait_all_children;
Dear Perl Monks, I want to use the exact Chinese Remainder Theorem solution in a program I am constructing but I am not confident which of the two long numbers below will be used by the scalar $crt1 in my program, or even which of the two is correct, although my gut tells me it is the solution shown by "say" is probably the one.
What coding should I use to ensure that $crt1 is always used correctly and printed correctly? Very grateful for your enlightenment.
#!/usr/bin/env perl
use warnings;
use strict;
use Math::BigFloat lib=>"GMP";
use Math::Prime::Util qw/:all/;
use feature ':5.10';
my $crt1=chinese([1,2],[1,3],[1,5],[5,7],[4,11],[9,13],[0,17],[14,19],
+[22,23],[28,29],[28,31],[27,37],[3,41],[15,43],[9,47],[51,53],[55,59]
+,[35,61],[17,67],[35,71],[67,73],[28,79]);
say $crt1;
printf ("crt solution is= %.0f\n",$crt1);
Installed Text::Unidecode (with no error message).
Then:
$ perl -e 'use Text::Unidecode'
Can't locate Text/Unidecode.pm in @INC (you may need to install the Te
+xt::Unidecode module) (@INC contains: ~/perl5/lib/perl5 ~/perl5/lib/p
+erl5 /usr/local/Cellar/perl/5.28.0/lib/perl5/site_perl/5.28.0/darwin-
+thread-multi-2level /usr/local/Cellar/perl/5.28.0/lib/perl5/site_perl
+/5.28.0 /usr/local/Cellar/perl/5.28.0/lib/perl5/5.28.0/darwin-thread-
+multi-2level /usr/local/Cellar/perl/5.28.0/lib/perl5/5.28.0 /usr/loca
+l/lib/perl5/site_perl/5.28.0/darwin-thread-multi-2level /usr/local/li
+b/perl5/site_perl/5.28.0) at -e line 1.
BEGIN failed--compilation aborted at -e line 1.
Tried 3 different installation methods (cpan -i, cpanm, manual install).
(And this module used to work on the same host few years ago. Lot's of system updates since then, though.)
I've read numerous posts on similar topics, but couldn't find any hint to debug this.
Context: MacOS Sierra 10.12.16, perl installed with homebrew
$ uname -a
Darwin Drogon.local 16.7.0 Darwin Kernel Version 16.7.0: Thu Jun 21 20
+:07:39 PDT 2018; root:xnu-3789.73.14~1/RELEASE_X86_64 x86_64
$ perl -e 'print $];'
5.028000
I frequently replicate others' posts so as to help if I can, learn more of a gigantic language, and have new scripts that will improve my own capabilities. So it is that chungley2000 rolled in with a question that morphed into about how to get values from Config. I've been playing with the values for a couple days now, and I wrote a script to see what output resulted from the 4 method function calls that this module exports. I've commented out failed attempts to herd these values into lexical variables.
#!/usr/bin/perl -w
use 5.011;
use Config qw(myconfig config_sh config_vars config_re);
use Data::Dumper;
say myconfig();
say "---------------";
say config_sh();
say "---------------";
say config_vars();
say "---------------";
my $ref_Env = \%ENV;
say Dumper $ref_Env;
my $version = config_re("version");
say "version is $version";
# my $archname = $Config{'archname'}; #produces error: %Config unknown
say "---------------";
#my $ref_Config = \%CONFIG;
#say Dumper $ref_Config;
My experience with the large family of Config modules has been with Config::Tiny, where I have imported such values from an .ini file. Now I would like to import the values from the myconfig() method into a hash.
If I had to get values quick and dirty, I would create a temp file with Path::Tiny, then read it with Config::Tiny. But when you have the darn thing in memory already, it seems like a significant work-around, in particular, when you are only going to delete the file for being a security risk. I don't want these data to be persistent beyond the first few lines of a perl script. Other modules from the Config namespace seem promising, but, for example CONFIG::Hash seems like it might be the thing I'm looking for, but not quite. There are at least 12 screens of matches for Config in cpan.
I could also use bash to pipe these values, but do I really need a shell? It seems like there could be a perl-only solution to this, which is more portable. My question then is how to to herd the = joined and newline separated values from
Hi all,
when transfering a simple data structure with XML::Simple xmlout I got an unwanted behaviour by XML::Simple.
The basic hash as simple as it can be:
The problem ist, that I donīt get <Account>..</Account> as wrapper of <consignment>...</consignment> but <name>Account</name> (when using SuppressEmpty => undef) or <Account>Account</Account> (when not using SuppressEmpty => undef).
Does anyone of you know why or what to configure to get the result I need?
