I have a 30 column tab delimited record file. I need to extract the first 10column. The following command to cut was not working
cut -f 1-10 -d "\t" filename.
Could any one keep on this .
Thanks in Advance (4 Replies)
Hi,
I need to append the data in to a file by using tab delimiter.
eg:
echo "Data1" >> filename.txt
echo "\t" >> filename.txt (its not working)
echo "Data2" >> filename.txt.
the result sould be like this.
Data1 Data2 (6 Replies)
hi every one
plz help me
i want to search for a line contains tabspace
This is a line The should be changed
see the above line is seperated with tab space i want to replace that tab space in to # as
This is a line#The should be changed
i have tried with... (4 Replies)
Hello,
Is there a direct command to check if the delimiter in your file is a tab or a space? And how can they be converted from one to another.
Thanks,
G (4 Replies)
Hi,
I am writing a Perl Script for the below :
I have a data file that consists of the header information which is 231 Lines and the footer information as 4 lines. The total number of line including the header and footer 1.2 Million with Pipe Delimited file.
For example:
Header Information:... (4 Replies)
I can not make it work, it prints \t rather than introduce tabs.
cut -d "," -f 4,8 Samples.csv --output-delimiter="\t" | sort > out
Since I am running this command within a shell script, I tried manually inserting tab in this command, still does not work. I am using bash shell
Suggestions... (8 Replies)
Hi,
I have two files like:
file1
chr1 40
chr1 50
chr2 10
chr2 60
file2
chr1 30
chr1 50
chr2 15
chr2 20
and want to get the difference of column 2 when column 1 is the same in both files. (4 Replies)
Hi All,
I am really new to Shell Scripting and would appreciate any help here.
I have a script that runs throguh a cron job on a daily basis, problem is when the file is attached and e-mailed, it uses a comma delimiter to seperate fields.
How can I prevent the script from using a comma... (2 Replies)
Hi,
Extremely new to Perl scripting, but need a quick fix without using TEXT::CSV
I need to read in a file, pass any delimiter as an argument, and convert it to bar delimited on the output. In addition, enclose fields within double quotes in case of any embedded delimiters.
Any help would... (2 Replies)
Discussion started by: JPB1977
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)