using c-shell, does anyone know how to send control characters to the printer before the job?
I need to set a printer to print in condensed mode
HELP (1 Reply)
I am trying to edit a syslinux msg file. I want to precede color codes with control characters. I have tried insert mode, then control v followed by the color code; however, I continue to get " [O " if I type the color code or enter ESC mode. How can I just insert say " ^L " ? (2 Replies)
Hi there,
I want to open a cash drawer remotely. The cash drawer is commanded by a printer.
I need to connect to the cash drawer which is connected over a network (and shared) and simply send a sequence of five ASCII commands (see http://pages.prodigy.net/daleharris/popopen2.htm) to a... (5 Replies)
Hi
I have a password stored in a file (which is a user input)
The password is having the special character $
say the password is pw$ord and is stored in the file pw_note
I am using the following statement to store the passowrd in a
variable
$schema_pwd = `cat $dir/pwd_note` ;
Now if i print... (4 Replies)
Hi,
I have an csv file and there are some non printable characters(extended ascii) so I am trying to create a clean copy of the csv file . I am using
this command:
tr -cd "" < /opt/informatica/PowerCenter8.6.0/server/infa_shared/SrcFiles/ThirdParty/locations.csv > ... (4 Replies)
Hi,
I am trying to get an output like :
+----------------------------------+ ----------- +
+ some variable substitution + some text +
Is there a way I can specify in printf (in ksh) the particular position I want to print a character, and also repeat a character from... (1 Reply)
Hi Experts,
I want to print this charts diagonal data into straight lines.
This is a matrix 24X24 Horizontal and vertical.
- I want to print all the diagonal cutting characters into straight line:
Data:
E F S S A H A L L A T M C N O T S O B O D U Q H
I W I B N L O C N I L N L A N S I N... (9 Replies)
How do I remove the printer escape sequence, the first 5 characters, that occurs on every 33rd line in a file, see hex dump of line 1.
0000 1e 00 00 00 00 0a 0a 0a 20 0a 20 20 20 20 20 20 ....
0010 20 20 20 20 20 20 20 20 20 20 0a 42 49 4c 4c 20
Thanks, (2 Replies)
My file (the output of an experiment) starts off looking like this,
_____________________________________________________________
Subjects incorporated to date: 001
Data file started on machine PKSHS260-05CP
**********************************************************************
Subject 1,... (9 Replies)
Discussion started by: samonl
9 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)