Hello all
I'm on SunOS5.9 and I'm trying to make the arrow keys work as in DOS ..get the previous command , etc .. I searched this site and got an answer. I pasted the following code to my .kshrc file in my home directory...It still does not seem to work ...Am I missing anything here ?
I'm... (5 Replies)
Hello,
I am new to this forum and relatively new to unix, but hope to become an expert soon!
My question is: How can I find out the execution time of a command that has already completed execution? More specifically, I launched a Python script to populate a PostgreSQL database on Suse... (2 Replies)
Guys,
In work we have just gotten a new HP 9000 server and I'm trying to set it up so that if I press <Up arrow> key I can see the command I typed in last(and press enter to run it again).
Can anyone advise how to set this up. One friend suggested I touch a file called .toucheditXXXX (I cant... (4 Replies)
We have a Solaris Server and I am acessing it through telnet to run various commands for my data validation like GREP, SED, AWK etc.
My requirement is how do i use the previous command that was executed. I tried the option 'ESC' and then 'k'. It displays the characters like '^[[A' etc. How do I... (0 Replies)
We have a Solaris Server and I am acessing it through telnet to run various commands for my data validation like GREP, SED, AWK etc.
My requirement is how do i use the previous command that was executed. I tried the option 'ESC' and then 'k'. It displays the characters like '^[[A' etc. How do I... (1 Reply)
We have a Solaris Server and I am acessing it through telnet to run various commands for my data validation like GREP, SED, AWK etc.
My requirement is how do i use the previous command that was executed. I tried the option 'ESC' and then 'k'. It displays the characters like '^[[A' etc. How do I... (2 Replies)
Hi All,
I would like to retrieve the whole command that got executed for a running process rather than a truncated string, as a result of running ps -ef on HP-UX.
Please help.
TIA (1 Reply)
Hi,
i would like to retrieve (only retrieve, not execute) a previous command which i executed on the command prompt. I tried the 'up arrow' key, but its not working. Instead,it showed me some funny characters. I searched around and i found the way to do it was using the way below. Several... (5 Replies)
Hi
I am trying to retrieve values from a tab-delimited file.I am using
while read record
value=`echo $record | cut -f12`
done
Where 12 is the column no i want retieve and record is one line of the file.
But it is returning the full record.
Plz help (4 Replies)
Discussion started by: akashtcs
4 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)