i think grep can only find char in files matching a pattern without any wildcards like ? correct? It works with * but not ?.
how can i write a small c program to find words in a file, like a list, that matches a pattern like ma?y, b??con, etc if grep doesn't understand ? in a pattern search. if... (1 Reply)
Hi Guys,
Can you help with the shell script:
I would like to search a fixed width pattern from a file
say for each line from a fixed position and lenght it has to return all rows from the file.
Example:
To search the third column for "def" it has to return 1 and 4th rows only
... (2 Replies)
I have a problem in searching a specific pattern in c files.
My requirement:
I have to find all the division operator in all cfiles.
The problem is, the multi line comments and single line comments will also have forward slash in it.
Even after avoiding these comments also, if both... (6 Replies)
can anybode tell me ? I want to search for a pattern present in a whole directory and subdirectories's files containg " crat"
I tried
grep -r "crat" */* ;
is it right ? (3 Replies)
Hi All,
Please can someone assist in the script I have made that searches a pattern in a file and delete the whole line containing the pattern.
#!bin/sh
# The pattern that user want to add to the files
echo "Enter the pattern of the redirect"
read value
# check if the user has... (1 Reply)
Hi,
I need small help from you people.
In a directory there are around 150 odd files and few them contain the word "TRACK" and few are not.
How can I find out the the list of those files which doesn't contain the word "TRACK"?
Thanks,
Siba (4 Replies)
in my file i have somthing likre
kpk_12
kpk_1
kpk_1.tcl
kpk_3.tcl
kpk
kpk
kpk
i want search only kpk i am using this cmd /kpk ...results it is showing all . any cmd is ther other then this to search exactword in this example kpk it shoulsnot show kpk_* etc
Thanks in Advance
... (2 Replies)
Hi there,
Looking forward to your advice for the below:
I have a file which contains 2 paragraphs related to a particular pattern. I have to search for those paragraphs from a log file and then print a particular line from those paragraphs.
Sample:
I have one file with the fixed... (3 Replies)
Discussion started by: danish0909
3 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)