Hi,
I am going to fetch a list of numbers that starts with "0032" from a file with a format like the given below:
"
0032459999 0032458888 0032457777
0032451111 0032452222 0032453333
0032459999 0032458888 0032457777
0032451111 0032452222 0032453333
"
I want to get a unique... (6 Replies)
If i want to grep for a value in a file but display only unique value then which option can i use.
ex: Values in the file
IP <1.2.3.4> value <2>
IP <1.2.3.4> value <2>
IP <1.2.3.4> value <3>
IP <1.2.3.5> value <1>
i should get only the unique value (3 Replies)
Hello, I have a file with a list of car makes and specific information for each make. An example is:
@Audi:Warranty
@Audi:Pricing
@Audi:Colors
@Acura:Warranty
@Acura:Pricing
@Acura:Colors
and so on through a bunch of makes. I need to make a list in a selection box of just one name of... (4 Replies)
Assistance on work Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
Files stored in ... (1 Reply)
Hi I want to find out those unique uids from the log file which have request and response.
The log file format is as follows. This log has other irrelevant lines too but each uid should have request and reponse, I need those uids only
2013-04-03 10:51:01,808 INFO <?xml version="1.0"... (4 Replies)
Hi I have the server.log file as:
Server Stopped
ABC
DEF
GHI
JKL
Server Started
MNO
PQR
STU
Server Stopped
VWX
YZ
ABC
Server Started
Server Stopped
123
456
789 (9 Replies)
Hello, I'm trying to used awk but am new to this. I have a file like this:
Bob is a good boy
Bob is a strange person
Bob is a good dancer
Jane can party
Jane is a good girl
Jane is batty
I'd like to get this:
Bob is a good boy
is a strange person
is a good dancer
Jane... (4 Replies)
Hi there,
I have data with similar structure as this:
CHR START-SNP END-SNP REF ALT PATIENT1 PATIENT2 PATIENT3 PATIENT4
chr1 69511 69511 A G homo hetero homo hetero
chr2 69513 69513 T C . hetero homo hetero
chr3 69814 69814 G C . . homo homo
chr4 69815 69815 C A hetero . . hetero
is... (10 Replies)
Here is my grep string to print only the last occurrence, with before and after lines. Note that the tail Argument is sum of B and A args + 1, so that it prints the data of only the last 1 match. Now I need to print last 2 such matches. I thought of doubling the tail arg like 5+5+1 (For -- line),... (2 Replies)
Discussion started by: samjna
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)