I backup a file to tape by using "dd", since the size is too large it took two tape for the backup, the question is how to restore the said file? The "dd" doesn't ask me insert next tape while restoration. (3 Replies)
I have an OCR output with some words splitted into single characters separated by blank spaces,
and I want the same text with these words written correctly.
Example:
This is a text w i t h some s p l i t e d W o r d s .
The regular expression for matching splitted words could be something... (5 Replies)
Friends,
I need help with the following in UNIX.
Merge all csv files in one folder considering only 1 header row and ignoring header of all other files.
FYI - All files are in same format and contains same headers.
Thank you (4 Replies)
Hi Folks,
I have a file like:
mainfile.txt:
-------------
file1 abc def xyz
file1 aaa pqr xyz
file2 lmn ghi xyz
file2 bbb tuv xyz
I need output having two files file1 and file2.
file1:
------
Name State Country
abc def xyz
aaa pqr xyz
file2: (3 Replies)
Hey :3
I am moving some stuff between different servers.
I do it like this:
scp -r -P 22 -i ~/new.ppk /var/www/bigfile.tar.gz user@123.123.123.123:/var/www/bigfile.tar.gz
Lets say, this file is 50 GiB. I would like to know, if its possible to split the file in different parts,... (2 Replies)
Hi all,
i have a binary file splitted into 2 chunks, first part with all high bytes and the second part with all low bytes.
I need to combine the two chunks into one binary file like (eg. exactly the reverse of the splitting method solved in the thread # 130940)
Hi bytes file content:... (7 Replies)
---------- Post updated at 11:48 AM ---------- Previous update was at 11:46 AM ----------
Hello all
I have an awk code that successfully creates separate text files based on the first six letters of the second field. What it doesn't do is preserve the header into each resulting file.
... (6 Replies)
Hi
I have a script that is sending mail and it was working fine. But the last time it run, it gave some errors. It look like the subject was split into many receiver. I am on AIX 6.1.
#!/bin/ksh
#
HOSTNAME=`which hostname`
MACHINE=`${HOSTNAME}`
# E-mail to inform hci of a stop
echo "###... (9 Replies)
I have to append the header (ie "START OF LINE") to a file only if there is data in it.
Below command is showing header though there is no data in a file, can you suggest how to correct..
awk '{NR!=0} BEGIN{print "START OF LINE"}; {print}' file (3 Replies)
Discussion started by: JSKOBS
3 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)