Hi,
Could someone please tell me what would happen if the following were entered into the command line:
rm -i /books/*.*
rm /books/*
Many thanks! (3 Replies)
I received a tar file of a directory with 50,000 files in it. Is it possible to extract the files in the tar file without first creating the directory?
ie. Doing tar -xvf filename.tar extracts as follows:
x directory/file1.txt
x directory/file2.txt
.
.
.
I would like to avoid... (4 Replies)
Hi
How to create a shell script which takes in to account all the files present within a directory DIR one by one
e.g.
suppose i have a directory named DIR where there are files with the extension .ABC
i want to create shell script which processes all these files one by one.
... (1 Reply)
Hello,
I have a very big directory with lots of small files. Just doing a single "ls" takes eternity, so I even can't know how many files the directory has.
I need to get the newest files in the last 15 minutes, but I can't get an eficient way of doing it. I've tried find, perl, shell script,... (4 Replies)
Hi All,
I have a directory in which there will be several files. i want to get all the files and pass it to a piece of code for processing on the files.
This is the piece of code which does the processing.
tr "\n" "|" < (log file name) | tr "$" "\n" > output
echo ' ' >>output
while... (1 Reply)
I am trying to loop through folders and extract the name of the lowest level subfolder
I was running the script below, it returns
/bb/bin/prd/newyork
/bb/bin/prd/london
/bb/bin/prd/tokyo
I really want
newyork
london
tokyo
I couldn't find a standard variable for the lowest level... (1 Reply)
Hi,
I have tar filw which has multiple directories which contain files.
When i extract using tar -xf the directory structure also get extracted.
I require only files and not directory structures as there will be overhead of moving the files again.
So i searched here and got a solution but... (4 Replies)
My input is as below :
/splunk/scrubbed/rebate/IFIND.REBTE.WROC.txt
/splunk/scrubbed/rebate/IFIND.REBTE.WROC.txt
/splunk/scrubbed/loyal/IFIND.HELLO.WROC.txt
/splunk/scrubbed/triumph/ifind.triumph.txt
From the above input I want to extract the file names only .
Basically I want to... (5 Replies)
Given a directory containing say a few thousand files,
please output a list of all the names of the files in the directory that are exactly the same, i.e. have the same contents.
func(a_directory_name) output -> {“matches”: , ... ]}
e.g. func(“/home/my/files”) where the directory... (7 Replies)
Discussion started by: anuragpgtgerman
7 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)