Hi,
I need to insert a line into a file underneath an existing line in the file, but am unsure as to the syntax. I'm pretty sure sed can be used though, although any ideas are more than welcome. For example:
File
----
Line 1
Line 2
Line 3
Line 4
Line 6
I need to say: Insert "Line 5"... (1 Reply)
Hi,
I'm new to Awk/Sed programming.
I have a status file like this:
TYPE | FILE1 | Now Started
TYPE | FILE2 | Just Finished
TYPE | FILE3 | Now Started
TYPE | FILE4 | Just Finished
For a given FILE no, I need to change the "Now Started" condition to "Just Finished" in this file. The... (5 Replies)
I am trying to retrieve part of a line from /boot/grub/menu.lst
The line is :
gfxmenu (hd0,0)/usr/share/gfxboot/themes/pclinuxblue/boot/message
I have figured out how to get this line into a file by itself.
sed '/gfxmenu/ !d' /boot/grub/menu.lst > /tmp/menu.lst.pcl_tc
What I need to... (2 Replies)
Can someone please help me correctly frame the below sed command:
sed 's/.*/$(date +%Y%m%d)' filepattern
I have read a line of the file in filepattern variable which is like below:
P.182.MKT_DISC.*.2_1_1.*
I want to replace the last .* part with the current date in the format yyyymmdd.... (6 Replies)
hi all,
tnsping DBNAME > out.txt
cat out.txt
TNS Ping Utility for Linux: Version 10.2.0.2.0 - Production on 23-JUL-2009 05:49:52
Copyright (c) 1997, 2005, Oracle. All rights reserved.
Used parameter files:
/fisc/oracle/product/10.2.0/network/admin/sqlnet.ora
Used TNSNAMES adapter to... (2 Replies)
I am executing the following command:
sort file1.txt | uniq -c | sort -n > file2.txt
The problem is that in file 2, I get leading spaces, Like so:
1 N/A|A8MW11
8 N/A|ufwo1
9 N/A|a8mw11
10 900003|smoketest297688
10 N/A|a9dg4
10 danny|danni
12... (5 Replies)
Hi,
I have some files being sent to me that have dates in them in this format:
from
1/8/2011 15:14:20
and I need the dates in this format (mysql date format)
To
2011-01-08 15:14:20
all I have so far is the regexp that detects the format:
sed -r -e 's@\1/\2/\3\4\5\6]::$@do... (7 Replies)
Hi I have a file that contains lines starting with a particular string plus a Colon: I need to output all these lines but only what comes after the colon
Can you pelase assist?
Example of lines in the file:
com.ubs.f35.cashequities/cashequities: 1 2
... (5 Replies)
Discussion started by: mnassiri
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)