Hi,
I can use the following command to create a file with some name then underscore and then date appended to it in the format 'DD-MM-YYYY':
touch "newfile_`date '+%d-%m-%Y'`"
But it gives me error when I try with the similar command to create a file with the date format 'DD/MM/YYYY'. I... (4 Replies)
I am trying to find a way to create a script which will extract the first line of a file and then rename the file (or create a new file with the same content as the old file) using the first line as the name. The first line being a single word, that is. I am hopeless at programming, if anyone can... (5 Replies)
I am looking to do something where if I created a file named backup,or whatever it would print a name like “backup_Apr_11_2011”. Thanks citizencro (1 Reply)
I have lots of files in this format:
dvgrab-2003.06.29_15-30-24.mpg
The numbers represents the date and time (YYYY.MM.DD_HH-MM-SS)
How can I extract the dates from the filenames, and use the dates in the file timestamp?
I guess this can be done by using "find", "sed" and "touch"?
Can... (6 Replies)
Hi,
I have a bash script which outputs a file with current year and month in the filename.
Last line is:
cat result_* > output.$(date +%y%m)
So for Feb 2013 this gives me output.1302
Now I am requested to run the script every first day of the month, but with the previous month in... (4 Replies)
Hi All,
I have incoming source files abcmmyy.txt I need to extract the mmyy part from the filename and pass that to a variable . I really appreciate your quick response on this.
Thanks
raj (7 Replies)
Hello experts, I want to join a file with files whosE names are mentioned in one of the columns of the same file.
File 1
t1,a,b,file number 1
t1,a,c,file number 1
t2,c,d,file number 2
t2,c,e,file number 2
t2,c,f,file number 2
t2,c,g,file number 2
t3,e,f,file number 3
file number 1... (3 Replies)
Hi,
I'm totally new in sell script and working with a shell code. I want to extract the date and time from the filenames. The filenames are different but all of them begins with WI_ SCOPE_:
WI_SCOPE_DATA_CHANGE_2017-09-12_15-30-40.txt
WI_SCOPE_BACK_COMPLETE_QUEUE_2017-09-12_15-31-40.txt... (5 Replies)
Hi,
I want to extract part of filename, for eg:
File="010020004_S-TOR-Sort-CASAP_20170519_121504_0007.TXT"
here i need first 5 words of file i.e.
FilePart="$(echo "${File%"${File#******}"}")"
Echo $FilePart
010020004_S-TOR-Sort-CASAP
But what if i get filename like below:
... (3 Replies)
Hi,
I am facing one scenario in which I need to extract exact position of date and time from the name of the files. For example, Below is the record in which I need to extract position of YYYYMMDD,HHMISS and YYMMDD. Date and time variables can come more than once. I need to use these position... (13 Replies)
Discussion started by: Prathmesh
13 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)