Hi,
Is it possible to accept a filename as command line parameter and then write to that file using command redirection? i tried the below script.
outputfile=`echo $1`
echo "Writing to file" > 'echo $outputfile'
exit $returncode
but it isnt working. is there any other way to... (9 Replies)
hi
i have a file contains data
Line timeout:
START->SIGNON_REPLY,
SIGNON_REPLY->SIGNON,
Received SOT req
SOT request:
SIGNON->SOT_REPLY,
SOT_REPLY->DATA_RECEIVE,
DATA_RECEIVE->EOD,
i need to write into one line , separated by commas
please help
thanks
Satya (2 Replies)
Hi,
I'm reading and writing a line from one file to another.
Input line is like this:
My name is David. Working on a shell script now.
When I use "echo" or "print" output comes like this,
My name is David. Working on a shell script now.
Sample... (7 Replies)
I need to write value of variable $version at a particular line in a text file.
Line number is determined by another variable &line......I don't know how to do it in shell script ... (2 Replies)
Hi,
I have to write s script to check an input file for invalid characters. In this script I have to find the exact line of the invalid character. If the input file contain 2 invalid character sat line 10 and 17, the script will show the value 10 and 17. Any help is appreciated. (3 Replies)
Dear All,
I have a question that's been difficult to get an answer to.
I often write command line loops, e.g. find files, print name, grep for term, apply sed, etc
I use both zsh and bash.
When I write a loop e.g.
for line in `more myfile.txt`
> do
> echo $line
> done
but... (2 Replies)
Given a particular line number and a corresponding column number, can i write something in the file during run time?
For example x=1 and during runtime i want to write the value of x in column 100 of every line of a given file, then how shud that be done?
Thanks (9 Replies)
Hi,
I have one input file with the following content:
MY_inpfile.txt
Aname1 Cname1 Cname2 1808 5
Aname2 Cname1 1802 47
Bname1 ? 1819 22
Bname2 Cname1 1784 11
Bname3 1817 9
Zname1 Cname1 1805 59
Zname2 Cname1 Cname2 Cname3 1797 27
Every line in my input file have a 4 digit... (5 Replies)
Hello
I am facing a very unique problem and not able to understand why. I have written a function which will check header of the file. If header is present good else it will write the header on top
def writeHeaderOutputCSV(fileName):
# See if the file exist already
try:
... (0 Replies)
Discussion started by: radioactive9
0 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)