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Another way without using substr (which is actually seldom used in Perl) is to use split, like a simple CSV file would be parsed, except with 'x' instead of ','.

#!usr/bin/perl use warnings; use strict; use Data::Dumper; while (my $line =<DATA>) { chomp $line; print "line = $line\n"; my $tokens =(my $first, my @rest)= split 'x',$line,-1; print "num tokens is: $tokens\n"; print Dumper $first, \@rest; print "\n"; } =prints line = 1212123x534534534534xx4545454x232322xx num tokens is: 7 $VAR1 = '1212123'; $VAR2 = [ '534534534534', '', '4545454', '232322', '', '' ]; line = 0901001x876879878787xx0909918x212245xx num tokens is: 7 $VAR1 = '0901001'; $VAR2 = [ '876879878787', '', '0909918', '212245', '', '' ]; line = 1212123x534534534534xx4545454x232323xx num tokens is: 7 $VAR1 = '1212123'; $VAR2 = [ '534534534534', '', '4545454', '232323', '', '' ]; line = 1212133x534534534534xx4549454x232322xx num tokens is: 7 $VAR1 = '1212133'; $VAR2 = [ '534534534534', '', '4549454', '232322', '', '' ]; line = 4352342xx23232xxx345545x45454x23232xxx num tokens is: 11 $VAR1 = '4352342'; $VAR2 = [ '', '23232', '', '', '345545', '45454', '23232', '', '', '' ]; =cut __DATA__ 1212123x534534534534xx4545454x232322xx 0901001x876879878787xx0909918x212245xx 1212123x534534534534xx4545454x232323xx 1212133x534534534534xx4549454x232322xx 4352342xx23232xxx345545x45454x23232xxx

In reply to Re: Perl - Remove duplicate based on substring and check on delimiters by Marshall
in thread Perl - Remove duplicate based on substring and check on delimiters by bopibopi

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