Hi,
I have a file in which i want to replace the charaters from position 3-5 with a particular string for the first line.
For ex
The file contains
abcdefghij
jkdsflsfkdk
908090900
i want to replace the characters 3-5 for the first line as 678
so, the file should look like
... (7 Replies)
I'm extremely new to scripting and linux in general, so please bear with me. The class I'm taking gives virtually no instruction at all, and so I'm trying to learn everything off the web.
Anyway, I'm trying to extract characters that follow after a specific pattern ( '<B><FONT FACE="Arial">' ) but... (3 Replies)
Hi,
I need to replace 10 characters string (21-30) in a file with another string.
I tried using cut command, i am able get these 10 charaters, but do not know how to replace them inside the file.
for example file content(these are alphanumeric characters):... (3 Replies)
Hello
I want to add some value at the specific position.
My file has data like
Hello
Welcome to UNIX Forums
Need Assistance
I want to add some value at the end but at same character position for all lines.
I want my output file to have data like :
Here '_' represents blanks.... (3 Replies)
Hi,
I have a fixed width file.
The way this file works is say for example there are 30 columns in it each with different sizes say 10,5,2, etc...
If data in a field is less than the field size the rest of it is loaded with spaces.
I would like an awk command to that would replace
I have... (8 Replies)
Hi Gurus,
I need replace some charactors in a file.
in following example. I need replace from 4th charactor to 6th charactor with x in each line.
abcdefghijklmn
123456789011
excepted result:
abcxxxghijklmn
123xxx789011
Thanks in advance. (6 Replies)
Hi experts,
My file looks something like this.
abcXX4,7,234
abc,defg,45XX23,74,123
The number of commas left of the XX can vary. The question is how can I replace all the commas left of the 'XX' with an underscore?
abcXX4,7,234
abc_defg_45XX23,74,123
Thanks! (5 Replies)
Need command for position based replace:
I need a command to replace with 0 for characters in the positions 11 to 20 to all the lines starts with 6 in a file.
For example the file ABC.txt has:
abcdefghijklmnopqrstuvwxyz
6abcdefghijklmnopqrstuvwxyz
abcdefghijklmnopqrstuvwxyz... (4 Replies)
I would like to remove all characters starting with "%" and ending with ")" in the 4th field - please help!!
1412007819.864 /device/services/heartbeatxx 204 0.547%!i(int=0) 0.434 0.112
1412007819.866 /device/services/heartbeatxx 204 0.547%!i(int=1) 0.423 0.123... (10 Replies)
Hi,
Im using sed on an AIX machine. I am trying to change the 137-139 characters if they are a ' 36'/'000' to a '036'. The positions that need to be changed are fixed.
the source data that I have is$cat v.txt
4000422985400050462239065593606500000007422985707771046154054910075641MC0318AMWAY... (9 Replies)
Discussion started by: dsid
9 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)