hi,
i am try to run following script in c-shell, using switch command.
#!/bin/csh
choice=0
while
do
echo "system monitor"
echo "
1) system paging
2) system file inf.
3) system disk inf.
9) exit
"
echo "select an option: \c"
read choice
case $choice in
1)... (3 Replies)
using switch can we match for more than one values..
eg:
switcha(a)
{
case 1, 2, 3: printf("ddd");
break;
case 4, 5, 6: printf("mmm");
break;
}
In this case wat i found was only for the last value, i.e 3 and 6 the switch works.
... (12 Replies)
Hi, have managed to code a script that has a simple menu so for instance if I run:
this will call a help function that displays the programs help, I have coded this in using a case statement so if: case is h) call the help function
The problem is I don't know how to code in the... (3 Replies)
Hi,
This script receive in input 2 parameters, the use $2 in this way:
switch ($2)
case r:
p=r--
echo $2 ok
breaksw
case rw:
p=rw-
echo $2 ok
breaksw
case rwx:
p=rwx
echo $2 ok
breaksw
default... (5 Replies)
Hello Community!
Anyone knows how can I access the switch for monitoring the traffic on my LAN?
The switch is a Linksys sr2024
Thanks in advance (1 Reply)
Guys,
I need to copy files from source to destination with datetime preserved
I did it with cp -p <source>/file <destinaltion>/file
But when I do stat command on copied file , it seems the copied file has "change time" modified.
Please guide me in understanding (2 Replies)
hi,
how to access console of a switch having rj45 on switch side to db 9 female on pc side console cable which needs to be connected to one console server having rj11 on its side and db 9 female on other end.i.e. on switch side,console cable has rj45 and db 9 pin female connector on other side of... (1 Reply)
Howdy, I'm trying to tar a bunch of files into their own individual tar archives. In other words i have files a.txt thru z.txt and i want to create a.tar thru z.tar in the same folder. I've been using -T to read in the list of files to be archived but i can't get it to work. I think my problem is... (5 Replies)
Discussion started by: fistikuffs
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)