Hi, I need to chope the header and footer record from an input file and make a new output file, please let me know how i can do it in unix.thanks. (4 Replies)
I have one large file, after every 200 line i have to split the file and the add header and footer to each small file?
It is possible to add different header and footer to each file? (1 Reply)
I have one large file, after every 200 line i have to split the file and the add header and footer to each small file?
It is possible to add different header and footer to each file? (7 Replies)
Hi All,
I have several txt files i need to enter specific header and footer (both are separate) to all these files how can i do this? plz help..
Regards,
Raghav (4 Replies)
Hi, Guys,
I want add header and footer in a file. I can add footer using following command:
echo "Footer" >>file.
I don't know how to add header.
Thanks in advance (4 Replies)
Hi,
I need to check whether the incoming file has a header and footer using a UNIX script. The pattern of the header and footer is fixed as follows:
Header: Name,Date
Footer: Count, Total
Name,Date
-------------------------
-------------------------
-------------------------
Count,... (5 Replies)
Hi All,
I need to write a script that In my file I have to check header and footer records are available or not. If it is available I have to run the script, otherwise I should not. But current script it is checking only the data inside the script. It is avoiding to check Header and Footer... (1 Reply)
I have two files which are getting sent to a UNIX server in order to be bcp'd into a database. The bcp is failing because there's a header and footer row on the file which give the date of the file and the number of rows in it. That's because the file is also being used for another process, so we... (1 Reply)
Hi There!
I am saving the file count of all files in a directory to an output file using:
wc -l * > FileCount.txt
I get:
114 G4SXORD
3 G4SXORH
0 G4SXORP
117 total
But this count includes header and footer. I want to subtract 2 from the count and get
... (7 Replies)
Hi I have below requirements on the script below :
(1) I receive 2 pipe seperated file called OUT.psv and DIFF.psv with a column header.I concatenate the 2 files and create a final.psv file. I want to add another header as START_FILE to the final.psv file . How to achieve this ?
(2) I have... (5 Replies)
Discussion started by: samrat dutta
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)