I AM TRYING TO APPEND THE HOSTNAME OF A UNIX SERVER I WORK WITH SO I COULD DO A LOADING INTO A DATABASE.
THE COMMAND I AM USING IS
df -k | sed 's/^/dataserver /'
What I intend to do is append the hostname dynamically by using the hostname command instead of having to manually enter... (1 Reply)
Hi ,
echo "07/05/2008" | sed 's/\(..\)\/\(..\)\/\(..\)/\3\2\1/'
Output :: 20050708
Expected output is 20080507
Iam not getting the bug in this.
Thanks for the help
-- penchal (4 Replies)
Hi,
I have to use SED to remove the prefix "219-" from a text file containing phone numbers and I have to remove the ":" as well. I write the following code but it does not seem to work. Can someone help me please?
mohit@mohit-desktop:~$ sed -n s/219-/" "/p corp_phones_bak > noprefix1... (2 Replies)
Hi All!
I am trying to use shell variables in a sed statement, but facing an error.I used the double quotes instead if single quotes in the sed statement.
# sed -i -e "s/password/$decoded/g;" $CATALINA_HOME/conf/server.xml
sed: -e expression #1, char 11: unterminated `s' command
#
... (5 Replies)
I have a file with a lot of numbers in it and I need to clean it up and make it look nice and proper. I found this little gem of a one-liner and basically understand what it is doing but I would like to further understand what each part of the command is doing. Being a newb, I am just trying to... (2 Replies)
Hi all
In input file I have records like this:
0,1,0,87,0,0,"6,87","170,03",0,"43,5",0,0,0,0,"6,87","126,53"and in output file I need that these records transforms in :
0 1 0 87 0 0 6,87 170,03 0 43,5 0 0 0 0 6,87 126,53
Could you help me in this case? Please (3 Replies)
Hi
i am stuck with a very silly problem :mad:
below is my code
echo 201010_1212_121.xml
i need to replace xml with csv so i did
echo 201010_1212_121.xml | sed 's/.*\.xml/.*\.csv/'
echo 201010_1212_121.xml | sed 's/*.xml/*.csv/'
echo 201010_1212_121.xml |... (4 Replies)
Hi Folks,
I want to replace these numbers with words as the following:
$echo 1 11 223
I want to replace each number with it name (e.g. "1" replaced with "one", etc.) just to determine how sed works in such case. Thanks in advance:).
Leo (8 Replies)
I don't know if you guys get this problem sometimes at Terminal but I had been having this problem since yesterday :( Maybe I overdid the Terminal. Even the codes that used to work doesn't work anymore.
Here is what 's happening:
* I wanted to remove lines containing digits so I used this... (25 Replies)
Discussion started by: Nexeu
25 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)