Or with Text::CSV/Text::CSV_XS:

use warnings;
use strict;
use Data::Dump;
use Text::CSV; # also install Text::CSV_XS for speed

my %data;

my $csv = Text::CSV->new({ binary=>1, auto_diag=>2,
    sep_char=>"|", allow_whitespace=>1 });
my $hdr = $csv->getline(*DATA);
while ( my $row = $csv->getline(*DATA) ) {
    push @{ $data{ $row->[0] } }, $row->[1];
}
$csv->eof or $csv->error_diag;

dd \%data;

__DATA__
ColA | ColB |
     500001| Network1|      
     500001| Network2|
     500002| Network2|
     500003| Network1|      
     500003| Network3|

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In reply to Re^2: Need to get hash of arrays by haukex
in thread Need to get hash of arrays by chandantul

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