Hi all,
is it possible to create a 'dynamic' case statement.
ie
select option in `ls`
do
case satement depending on results of the above `ls`
done
I hope I have explained this ok!
Thanks
Helen (1 Reply)
Hello.
Consider the following magic words:
# ls `which adduser`
ls: /usr/sbin/adduser: No such file or directory
#
Hmmm...
Then:
# ls /usr/sbin/adduser
/usr/sbin/adduser
#
Now what?
Unforunately this little sniippet is used in my debian woody server's mysql pre install script.... (2 Replies)
Hi,
I am writing a bash shell script. My script has a few user defined parameters. When the script runs the first thing it does is make sure that these parameters are valid. One of the parameters is called YEAR. A valid input for YEAR can be 1997-2000.
One way I have come up with to ensure... (3 Replies)
Hi,
I am writing case statement to execute some finction, my requirement is once one of the case statement is executed again it has to prompt for the option.
for script in `echo "$Script_Selected"`
do
case $script in
1) getNoOFActUsers
;;
2) moveServerrOORotation
;;
... (2 Replies)
I am trying to get folder names that contain only numbers.
Can someone explain why following command is printing 'total 450' as part of output..
$> ls -lt | awk '$9 ~ /^*$/' | more
total 450
drwxr-x--x 3 user1 group1 512 Mar 9 2008 329227163
drwxr-x--x 3 user1 group1 ... (17 Replies)
Hello,
The standard case statement :-
case "$1" in
"IE0263")
commands;;
"IE0264")
commands;;
esac
is it possible to have :-
case "$1" in
"IE0263" OR "IE0878")
commands;;
"IE0264")
commands;;
esac
Thanks (4 Replies)
Below is what i have in my script.
htcount=$(curl -s --user tomcatstatus:tomcatstatus http://`hostname`.mypc.com:887/manager/jmxproxy?qry=Catalina:type=ThreadPool,name=\"http-nio-887\" |grep sBusy | cut -d ' ' -f2)
echo $htcount
if ; then
echo "more than 10"
else
echo "Less than 10"
fi... (6 Replies)
I'm having an issue with bash read input when using a case statement.
The script halts and doesn't read the input on the first loop. if I hit enter then the scripts starts to respond as expected. Need some help here.
defaultans=8hrs
read -e -i $defaultans -p "${bldwht}How long would you like... (5 Replies)
Discussion started by: woodson2
5 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)