I have a huge file (over 30mb) that I am processing through with perl. I am pulling out a list of filenames and placing it in an array called @reports.
I am fine up till here. What I then want to do is go through the array and find any duplicates. If there is a duplicate, output it to the screen.... (3 Replies)
I am trying to figure out how to scan a file like so:
1 ralphs office","555-555-5555","ralph@mail.com","www.ralph.com
2 margies office","555-555-5555","ralph@mail.com","www.ralph.com
3 kims office","555-555-5555","kims@mail.com","www.ralph.com
4 tims... (17 Replies)
I have million's of records each containing exactly 50 characters and have to check the uniqueness of 4 character substring of 50 character (postion known prior) and report if any duplicates are found.
Eg. data...
AAAA00000000000000XXXX0000 0000000000... upto50 chars... (2 Replies)
Hi,
can I do something like this to add a condition of checking if the 4th field is number or space or blank also:
awk -F, '$4 /^*||*/' MYFILE >> OTHERFILE
I also want the other part i.e. I need to exclude all lines whose 4th field is space or blank or number:
MYFILE
a,b,c,d,e
a,b,c,2,r... (2 Replies)
Hi,
I have a pipe seperated file
I want to write a code to display count of lines that have 20th field not null.
nawk -F"|" '{if ($20!="") print NR,$20}' xyz..txt
This displays records with 20th field also null.
I would like output as: (4 Replies)
I was trying to use the AIX 6.1 sort command to sort fixed-length data records, sorting by specific columns only. It took some time to figure out how to get it to work, so I wanted to share the solution. The sort man page wasn't much help, because it talks about field delimeters (default space... (1 Reply)
I am currently creating a script to find filenames that are listed once in an input file (find non duplicates). I then want to report those single files in another file. Here is the function that I have so far:
function dups_filenames
{
file2=""
file1=""
file=""
dn=""
ch=""
pn=""
... (6 Replies)
Hi team,
I have 20 columns csv files. i want to find the duplicates in that file based on the column1 column10 column4 column6 coulnn8 coulunm2 . if those columns have same values . then it should be a duplicate record.
can one help me on finding the duplicates,
Thanks in advance.
... (2 Replies)
Hi everyone. I'm trying to help my wife with a project, she has exported 200 images from many different folders, unfortunately there was a problem with the export and I need to find the master versions so that she doesn't have to go through and select them again.
I need to:
For each image in... (2 Replies)
Discussion started by: Rhinoskin
2 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)