I have a large dat file where each lines are pipe delimited values. I need to parse the file depending on the request. For example: sometimes I have told to remove all the values in the 7th column (this case remove values '3333' only from the first line and '3543' from the second line) from the file. As the file contains thousands of lines, I need to find a way that can be done easily. I know it can be done by sed or perl but with my limited knowledge I am not able to figured it out.
Note that from time to time I need to remove values from nth column.
Input:
Output:
Any help is greatly appreciated!
Last edited by Don Cragun; 04-22-2014 at 01:05 AM..
Reason: Add CODE tags.
hi,
How can I check for a field in a pipe-delimited file having a NULL value in Unix using a grep command or any other command.
Please reply (5 Replies)
I have file with multiple columns. Column values for a record may be same.
Now i have to replace a column value(this can be same for the other columns) with new value.
File.txt
A,B,C,D,A,B,C,D,A,B,C,D
A,B,C,D,A,B,C,D,A,B,C,D
A,B,C,D,A,B,C,D,A,B,C,D
A,B,C,D,A,B,C,D,A,B,C,D... (1 Reply)
Hi this is my first time posting ever. I'm relatively new in using AWK/SED, I've been trying many a solution. I'm trying to replace the 59th column in a file where if I encounter '' then I would like to replace it with the word NULL.
example
0 , '' , '' , 0 , 195.538462
change it to
0... (5 Replies)
Hi,
I have a pipe delimited txt file which contains 17 fields per line/row.
16th field contains email id. I want to count the number of lines/rows that contains null in the 16th field.
Plz find attached example data file.
I'm looking for a command line/script which achieves this.
... (5 Replies)
hi,
I have pipe delimited flat file as below
1|ab|4.5|9|
2|ac|3|12|
3|ac|4.5|8|
i want to show (display) only 3rd field between pipes.
please help (1 Reply)
Hi,
I am trying to find the lines in a pipe delimited file where 11th column has not null values. Any help is appreciated. Need help asap please.
thanks in advance. (3 Replies)
Hi All, I will need an help with respect to replacing a range of columns on a non-delimited file using a particular string pattern.
Say file input is
MYNUMBERD000000-BAN CHUE INSNTS ** N+
MYAREDSDD000000+BAN CHUE INSNTS ** N+
MYDERFFFSD00000-GIR PENT - ACH ** ... (5 Replies)
Hi,
I have a pipe delimited file as below and I need to replace the 2nd column of each line with null values.
1|10/15/2011|fname1|lname1
2|10/15/2012|fname2|lname2
3|10/15/2013|fname3|lname3
Output file:
1||fname1|lname1
2||fname2|lname2
3||fname3|lname3
I tried this
... (2 Replies)
Hi,
I have a requirement where I have to check whether the mandatory columns in a pipe delimited file is null and print error message.
For eg, I have to check if the 3rd,5th,6th,7th and 8th column are null and print the message "<column name> is null".
The data file will have aroung 100,000... (6 Replies)
I have an input file as below
Emp1|FirstName|MiddleName|LastName|Address|Pincode|PhoneNumber
1234|FirstName1|MiddleName2|LastName3| Add1 || ADD2|123|000000000
Output :
1234|FirstName1|MiddleName2|LastName3| Add1 ,, ADD2|123|000000000
OR
1234,FirstName1,MiddleName2,LastName3, Add1 ||... (2 Replies)
Discussion started by: styris
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)