hi,
I have a 20 line file.
I need a command which will brinf back a specific line based upon the line number I enter.
e.g. the file looks like this and is called file1
jim is a man
john is a woman
james is a man
wendy is a woman
lesley is a woman
i want a command that will... (4 Replies)
hello all,
I have a file like this:
section 1
blah1
blah2
section 2
blah1
blah2
section 3
blah1
blah2
and I want to use sed to duplicate section 2, like this:
section 1
blah1
blah2
section 2
blah1
blah2
section 2
blah1 (2 Replies)
Hi,
I have a text file 10giga size.
Opening the file with vi takes forever ...
Im intersting only with the 100 first records.
Is there way to copy those 100 lines to new file (with no need to open the file)?
Thanks (6 Replies)
I have a list of Servers in no particular order as follows:
virtualMachines="IIBSBS IIBVICDMS01 IIBVICMA01"And I am generating some output from a pre-existing script that gives me the following (this is a sample output selection).
9/17/2010 8:00:05 PM: Normal backup using VDRBACKUPS... (2 Replies)
Hi,
My requirement is that I've to read a config file having below info
Oracle
number|double;integer -> user can put multiple values here
blob|binary
varchar2|string
varchar|string
number(p,s)|decimal
timestamp|date/time
and so on ....
Sybase
bigint|bigint
datetime|date/time... (2 Replies)
i have a file as below that has n section :
2006 0101 1236 49.3 L 37.902 48.482 0.0 Teh 5 0.2 2.7LTeh 1
GAP=238 E
Iranian Seismological Center, Institute of Geophysics, University of Tehran 6
... (5 Replies)
Hello,
I have to a add 2 lines to /etc/sudoers file under this section below, can someone please suggest script to add these two lines when execute this remotely on to a multiple servers.
before
## Allow root to run any commands anywhere
root ALL=(ALL) ALL
After
## Allow root... (2 Replies)
In the below, I am trying to lookup $1 and $2 from file1, in a range search using $1 $2 $3 of file2. If the search key from file1 is found in file2, then the word low is printed in the last field of that line in the updated file1. Only the last section of file1 needs to be searched, but I am not... (6 Replies)
Hello,
I need to know all IP range (ip_prefix), associated with us-west-2 region only from this link - https://ip-ranges.amazonaws.com/ip-ranges.json (it can be opened in wordpad for better visibility)
Please suggest, how would I do it. If vi, awk or sed is needed, I have downloaded it on my... (7 Replies)
Hi Gurus,
I have below file which has different sections, need to move the sections to beginning of the each record.
original file
aaa
bbb
ccc
ddd
eee
fff
output file.
aaa
bbb
ccc
ddd
eee
fff (6 Replies)
Discussion started by: green_k
6 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)