Hello
I am on my way to improve my wonderful Perl skills, I got an issue which I want to share with you all. I have a Perl module which looks like
and I want to print the value of variables a, b and c. I am trying below but fails
It does not print any thing. Also it does not throw any error..
Try to use printf
i do not have time to test but one them should work.
All
Please help me to call url in Perl. Ex:
http://www.test.com/dynf?urn=123
Assume it will return success if 123 is in urn or it will return " failed".
I want store this return type in a variable.
Please help me to call the URL through PERL.
Thanx in advance
Regards
Deepak (1 Reply)
Hi all,
Not sure if this is the right forum to post query regarding perl script.
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Hi,
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Thanks (5 Replies)
Hi,
I am trying to execute a perl script from c program.
I tried using system command.
system("perl test.pl filename") ;
This perl program takes filename as input and prints a number
to screen.
I need to get that returned number in C program.
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Hi ,
Here is my piece of code--
main();
sub main
{
$result = GetOptions ("LogDir=s" => \$LogDir,
"Summary" => \$Summary,
"Indiviual=s" => \$Individual ,
"Diagnostics=s" => \$Diagnostics,
... (1 Reply)
On bash I run precompiled c Program as follows:
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I need to run this same program in perl
I am aware of exec command though not... (7 Replies)
hi all,
I have 3 perl scripts a.pl,b.pl and c.pl
each of these work when i pass a date for eg: perl c.pl 2010-05-27
now i want to write a perl script that would call the 3 scripts and make it run all the 3 scripts (a.pl,b.pl,c.pl) parallelly rather than 1 after the other.......
pls... (2 Replies)
All,
Is it possible to call a subroutine from the perl expect module after logging to a system that is within the same program. My situation is I need to run a logic inside a machine that I'm logging in using the expect module, the logic is also available in the same expect program.
Thanks,... (5 Replies)
Can anyone break down the different methods of using SSH in perl? I'm currently using Net::SSH::Expect, which allows me to login to a machine and execute multiple commands without having to ssh again. This feature of holding the session works well for me, but it's slow. If I set timeouts to 4... (3 Replies)
Note: Not a programmer by profession but occasionally have to program.
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A couple of... (5 Replies)
Discussion started by: Vi-Curious
5 Replies
LEARN ABOUT DEBIAN
devel::refcount
Devel::Refcount(3pm) User Contributed Perl Documentation Devel::Refcount(3pm)NAME
"Devel::Refcount" - obtain the REFCNT value of a referent
SYNOPSIS
use Devel::Refcount qw( refcount );
my $anon = [];
print "Anon ARRAY $anon has " . refcount($anon) . " reference
";
my $otherref = $anon;
print "Anon ARRAY $anon now has " . refcount($anon) . " references
";
DESCRIPTION
This module provides a single function which obtains the reference count of the object being pointed to by the passed reference value.
FUNCTIONS
$count = refcount($ref)
Returns the reference count of the object being pointed to by $ref.
COMPARISON WITH SvREFCNT
This function differs from "Devel::Peek::SvREFCNT" in that SvREFCNT() gives the reference count of the SV object itself that it is passed,
whereas refcount() gives the count of the object being pointed to. This allows it to give the count of any referent (i.e. ARRAY, HASH,
CODE, GLOB and Regexp types) as well.
Consider the following example program:
use Devel::Peek qw( SvREFCNT );
use Devel::Refcount qw( refcount );
sub printcount
{
my $name = shift;
printf "%30s has SvREFCNT=%d, refcount=%d
",
$name, SvREFCNT($_[0]), refcount($_[0]);
}
my $var = [];
printcount 'Initially, $var', $var;
my $othervar = $var;
printcount 'Before CODE ref, $var', $var;
printcount '$othervar', $othervar;
my $code = sub { undef $var };
printcount 'After CODE ref, $var', $var;
printcount '$othervar', $othervar;
This produces the output
Initially, $var has SvREFCNT=1, refcount=1
Before CODE ref, $var has SvREFCNT=1, refcount=2
$othervar has SvREFCNT=1, refcount=2
After CODE ref, $var has SvREFCNT=2, refcount=2
$othervar has SvREFCNT=1, refcount=2
Here, we see that SvREFCNT() counts the number of references to the SV object passed in as the scalar value - the $var or $othervar
respectively, whereas refcount() counts the number of reference values that point to the referent object - the anonymous ARRAY in this
case.
Before the CODE reference is constructed, both $var and $othervar have SvREFCNT() of 1, as they exist only in the current lexical pad. The
anonymous ARRAY has a refcount() of 2, because both $var and $othervar store a reference to it.
After the CODE reference is constructed, the $var variable now has an SvREFCNT() of 2, because it also appears in the lexical pad for the
new anonymous CODE block.
PURE-PERL FALLBACK
An XS implementation of this function is provided, and is used by default. If the XS library cannot be loaded, a fallback implementation in
pure perl using the "B" module is used instead. This will behave identically, but is much slower.
Rate pp xs
pp 225985/s -- -66%
xs 669570/s 196% --
SEE ALSO
o Test::Refcount - assert reference counts on objects
AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
perl v5.14.2 2011-11-15 Devel::Refcount(3pm)