I am writing a C program that part of the idea is to using a command line parameter to control not to run certain part of the sub program.
I am totally new to C, I do not have any idea how to pass a command line arguments from a C program.
Can anyone help ?!
Thanks (3 Replies)
Anyone know how to set it up so that when at command line in unix (specifically solaris 2.5.1), and you hit the tab it will finish the command with the nearest file that matches? AND how to set it up so using up and down arrows access your previous commands?
Thanks for all the help here, i've had... (3 Replies)
Hello,
I am trying to replace a string with a paramter given along with the script.
I am replacing application1 to application2 with the script:
./change_app.sh application2
change_app.sh:
#!/bin/ksh
grep $1 applications.dat 2>&1 >/dev/null
echo $1
file=pckage.new
sed 's/Name:... (5 Replies)
Hi,
I need to check if a parameter provided at the command line is equal to --.How can i do that ? Please help me.
Thanks and Regards,
Padmini (4 Replies)
"$#" gives the number of command-line arguments. How do you get the last command-line parameter (or any particular one determined by a variable)? I thought it would be "${$#}", but that produces something completely unexpected. (4 Replies)
I have a simple script that builds a complex program call which passes a number of parameters to the program. I'm trying to enhance the script to include the value of the command line parameter in the name of a file being created. The problem I'm having is that the parameter may include a forward... (11 Replies)
i am a beginner, i want to make a program that takes any command line arguments... and print it out in reverse.
ie. if the command line argument is "thanks for helping me"
i want it to output "me helping for thanks" :D
i have tried using the reverse command, but i cant get it working!!
... (3 Replies)
Hello Everyone,
I have been trying to complete a shell script where, I need to increment the date depending on the file (depending on the date) availability on the remote server.
i.e.
Basically, I will be passing a counter (like parameter 1 or 2 or 3 or 4).
First I will check for the... (1 Reply)
Hello All,
I have file a.txt
I want to add a counter loop at the end of each line in a file
ill explain:
i have a site h**p://test.test=Elite#1
i want to add a a counter to the number at the end of the file, that it will be like this
urlLink//test.test=Elite#1
urlLink//test.test=Elite#2... (3 Replies)
Discussion started by: nexsus
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)