Perl one line fix

Hi,

This is my input:

data1,data2,data5,data6,data3,data4
data1,data2,data5,data7,data9,data8

I want output as below ( spliting each line by 3 columns )

data1,data2,data5
data6,data3,data4
data1,data2,data5
data7,data9,data8

This the code i have tried:
But i am getting output excluding data5 , please advice

#!/usr/bin/perl
use strict;
use warnings;
my $file = shift or die "usage: $0 Inputfile";
open FH , $file or die "unable to open $file , $!";
my @data = map { chomp; $_ } <FH>;
#print join ("\n",@data);
foreach (@data) {
my @ds = split /data5,/, $_;
print $_ , "\n" for @ds;
}

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Thanks,
Magento

Perl

Last Comment

magento

8/22/2022 - Mon

ASKER CERTIFIED SOLUTION

ozo

1/3/2014

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ozo

1/3/2014

or
perl -pe 's/(?<=data5),/\n/' input
or
perl -F, -ane '$"=",";print "@F[0..2]\n@F[3..5]"' input
or
perl -pe '$"=s/(,.*?,.*?),/$1\n/' input

magento

1/3/2014

ASKER

Hi Ozo ,

Worked as per my needs. Great thanks.

Can you advice what actually (?<=data5), does?

Thanks

ozo

1/3/2014

perl -MYAPE::Regex::Explain -e 'print YAPE::Regex::Explain->new(qr/(?<=data5),/)->explain'
The regular expression:

(?-imsx:(?<=data5),)

matches as follows:

NODE EXPLANATION
----------------------------------------------------------------------
(?-imsx: group, but do not capture (case-sensitive)
(with ^ and $ matching normally) (with . not
matching \n) (matching whitespace and #
normally):
----------------------------------------------------------------------
(?<= look behind to see if there is:
----------------------------------------------------------------------
data5 'data5'
----------------------------------------------------------------------
) end of look-behind
----------------------------------------------------------------------
, ','
----------------------------------------------------------------------
) end of grouping
----------------------------------------------------------------------

Your help has saved me hundreds of hours of internet surfing.

fblack61

magento

1/3/2014

ASKER

Ozo , Many thanks for the explanation.