i have done a coding in shell scripting which reads a file line by line and does something....it takes more than 30 seconds to execute for a single file. when i do the same with perl scripting it takes less than a second.
is that shell scripting is not efficient while working with large number of... (1 Reply)
Hi all,
I tried to write a shell to read huge file and eliminate max length record which is wrong generated record. But I get an error
remove_sp.sh: line 27: syntax error near unexpected token `else'
remove_sp.sh: line 27: ` else $LINE >> REJFILE'
My shell is here:
#!/bin/sh... (5 Replies)
Hello
I'm stuck trying to solve this KSH issue and I'm hoping someone out there can offer some suggestions.
I want to read lots of large .gz files one line at a time in order to compare its Error entries with a list of known errors. I can't simply do "foreach ERROR do gzcat *.gz |grep... (2 Replies)
Need shell script to read two file at same time and print output in single file
Example I have two files 1) file1.txt 2) file2.txt
File1.txt contains
Aaa
Bbb
Ccc
Ddd
Eee
Fff
File2.txt contains
Zzz
Yyy
Xxx (10 Replies)
Hello community,
what I need to do is read 2 rows at time from a file. I have this simple solution:
File to read:
LINE1
LINE2
LINE3
LINE4
LINE5
LINE6
LINE7
LINE8Read routine:#!/bin/ksh
sed '1,3d' /out.txt | while read line; do
read line2
echo $line $line2
doneResult:LINE1... (5 Replies)
Hello All,
I have a file like below....
dn: cn=user1,ou=org,o=org
cn=user1
uid=user1
cn=user2,ou=org,o=org
cn=user2
uid=user2
cn=user3,ou=org,o=org
cn=user3
cn=user33
uid=user3
cn=user4,ou=org,o=org
cn=user4
uid=user4 (6 Replies)
Hi,
I have the below text:
16:00 0.50
16:00 0.30
16:00 0.00
16:00 0.00
16:00 0.30
16:01 0.00
16:01 0.30
I want to find the max of the 2nd column grouping by the values in the 1st column using awk. So
16:00 0.50
16:01 0.30
I have tried (3 Replies)
You have a log file as attached in sample input with various operations and time taken by each of them. Write a script to find the min and max time taken for each operation. Sample output is attached.
Sample Input is given as below:
operation1,83621
operation2,72321
operation3,13288... (1 Reply)
Discussion started by: Chandan_Bose
1 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)