Hi all,
I appreciate the enormous amount of knowledge that flows in this forum.
I am an average UNIX user. I have many files with lines like the below. I have separated each line with space for ease of reading. I need to replace the first occurance of "/00" with null on those lines that have... (6 Replies)
Hi,
I have a Line input for awk as follows
DROP MATERIALIZED VIEW MCR.COMM_STACK;
CREATE MATERIALIZED VIEW "MCR"."COMM_STACK"
ON PREBUILT TABLE WITHOUT REDUCED PRECISION
USING INDEX
REFRESH FAST ON DEMAND START WITH sysdate+0 NEXT SYSDATE + 7
WITH PRIMARY KEY USING DEFAULT... (3 Replies)
Match column 3 in file1 to column 1 in file 2 and replace with column 2 from file2
file 1 sample
SNDK 80004C101 AT
XLNX 983919101 BB
NETL 64118B100 BS
AMD 007903107 CC
KLAC 482480100 DC
TER 880770102 KATS
ATHR 04743P108 KATS... (7 Replies)
Given this row:
|lastname1|middlename1|firstname1|lastname2|middlename2|firstname2
produce this result:
|lastname|middlename|firstname
where the resultant names are based on the presence of the #2 names above. I.e., if a #2 name is passed (usually will be null,) use that - otherwise... (8 Replies)
I need to read the contents of a file. Then I need to grep for a keyword and replace part of the grepped line based on the condition of previous and present line.
Example input file:
V {
port1 = P;
port2 = 0;
shift_port = P0; /* if next shift_port is P0 I need... (7 Replies)
I'm looking for an awk or (preferably) sed solution to search a pipe delimited file for any occurrence of an email address that does not include a designed domain, and replace the email address with a blank. E.g.
hello|smith@designateddomain.com|jones@anotherdomain.edu|1234|
turns into:
... (2 Replies)
I have two files, and I'm interested in the first two columns of each.
File1 compares set1 to set2 (column1 = set1 name, column2 = set2 name).
File2 compares set2 to set1 (column1 = set2 name, column2 =set1 name).
I want to print the set names (column values) that appear as pairs in both... (1 Reply)
Hi,
I have a file (stats.txt) with columns like in the example below. Destination IP address, timestamp, TCP packet sequence number and packet length.
destIP time seqNo packetLength
1.2.3.4 0.01 123 500
1.2.3.5 0.03 44 1500
1.3.2.5 0.08 44 1500
1.2.3.4 0.44... (12 Replies)
Hi Folks,
I'm trying tog ain further experience with shell programming and have set my a small goal of writing a little filesystem monitoring script. So far my output is as follows:
PACMYDB03
Filesystem Size Used Avail Use% Status
/usr/local/mysql/data ... (5 Replies)
Discussion started by: Axleuk
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)