HI folks,
I have just deleted a folder which i need it back. I am not a big
unix user so any help is appreciated. The thing is that i had found
images in a folder:
./home/tom/.kde/share/cache/http/b/.jpg
as you can see these images should not really be here.
When i asked a guy in... (7 Replies)
Hi,
How can I undo installation of a package on AIX 4.3 properly?
It's an install script. On linux, I usually just kill the process and delete from disk with this command "find .... exec rm -r {}\;". And it usually works. Can I do the same with AIX 4.3?
Thanks,
Itik (2 Replies)
Hi All,
I'm a newbie to system administration, I'd like to know how to check the logs (what update was installed last) , and I'd like to know how to undo the last update on the fedora 9 system ( kindof an equivalent to system restore in windows).
I have a HP 22 inch monitor, when I installed... (3 Replies)
Hi
I had extended one of the FS yesterday as rsync was failing and the temp solution was to extend it to 4GB while we worked on cron script.
spthrv01:/root# bdf /p05
Filesystem kbytes used avail %used Mounted on
/dev/vg232/lvol1 130940928 82208608 48385792 63% /p05
... (5 Replies)
I generally use 'u' to do undo in vi editor. The problem is that it only does one level of undo.
Is it possible to recursively undo all the changes in vi editor till we reach the original stage. (2 Replies)
Hi. Newbie here....so Unix for Dummies question for sure.
I was compiling a piece of software and having problems and somebody suggested:
sudo ln -s /usr/X11 /usr/X11R6
Didn't work. How do I undo this?
I am on a Mac OS X snow leopard. I figure it is something with the unlink command... (7 Replies)
I installed Solaris 11 Express on my machine and connected to it remotely using putty. I then run the svcadm disable /network/physical:nwam command to stop the NWAM service.
Now I cannot connect to the Solaris machine remotely anymore, but I have physical access to it as well.
How do I undo... (1 Reply)
Hello!
As a totally newbie I was testing 'mount' command but it doesn't worked for me.
then finally I used this commend above 'mount /test / ' - and sever doesn't respond now :/
Is it possible to undo somehow this commanand? (5 Replies)
Hi,
Could anyone please advise if its possible in unix to undo the changes for a file that has been overwrriten.
By mistake i have overwritten a file and now i need the original file, is there a way?
Please Help!!! (2 Replies)
Discussion started by: mail.chiranjit
2 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)