Been a while since I futzed around with Perl, and came upon a minor headscratcher for the community
Here's the basic code which I'm trying to make tick over:
Queerly, this will not work on hidden (.somedir) dirs!
So, not being one to give up too easily, I even tried passing a couple bashlines to the system as well. Here are the better substitute "while" statements which I tried:
Of course, none of these worked in our Perl context
Any ideas for a "simple" solution amended from this rag-tag assortment would be quite appreciated!
I have never heard of this before but someone at work here says there is a command to find files that are under currently mounted filesystems. Does anyone know what this command is and is it available on HP-UX? (3 Replies)
Hi. I have a script which is deleting files with a particular extension and older than 45 days.The code is:
find <path> -name "<filename_pattern>" -mtime +45 -exec rm {} \;
But the problem is that some important files are also getting deleted.To prevent this I have decide to make a dummy... (4 Replies)
Hi Guys,
I need to count files in a dir which were updated yesterday.
ls -lth | grep -i 'Jul 7' | wc -l
The dir holds files of last 15 days and total count is as 2067476.
Is it efficient to count the files using perl? I have developed the following perl script making use of system().
Can... (3 Replies)
I have written a script to secure delete all files in a quarantine folder and my Trash folder. All the commands run trough Terminal via the script.
The problem I am having is when I am changing the directory to the hidden Trash folder. When I do cd /Users/WatsonN/.Trash all it does is take it to... (2 Replies)
I have an application consisting of a number of perl files. I want to find those perl files that have no documentation yet, so I tried the following from the root level of the directory where the application resides:
perldoc -r *
The output is something like the following:
No documentation found... (2 Replies)
Hi,
Me i ask if someone knows about this hidden directory or it me knows where this dir associated with or in a program.
I had and notices this .awo dir with bin files inside title 6770669_info.eeesync files in my directory. I wonder if this is associated with my backup program or any program... (0 Replies)
I am completely new to perl programming. My father is helping me learn said programming language. However, I am stuck on one of the assignments he has given me, and I can't find very much help with it via google, either because I have a tiny attention span, or because I can be very very dense.
... (4 Replies)
I'm writing a Perl script which has its 1st step as to copy files from one directory to another directory. The Source directory has got files with extension, without extension, directories etc. But I want to copy ONLY files with no extension. The files with extensions and directories should not get... (2 Replies)
Hello.
I use this command :
rsync -av --include=".*" --dry-run "$A_FULL_PATH_S" "$A_FULL_PATH_D"The data comes from the output of a find command.
And no full source directories are in use, only some files.
Source example... (2 Replies)
Discussion started by: jcdole
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)