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( #3333=superdoc: print w/replies, xml ) Need Help??

At least this does not fail any of the test cases you have provided :)

#!/usr/bin/perl use strict; # https://perlmonks.org/?node_id=11140211 use warnings; my $data =<< "END"; head1|head2|head3 val1|val2|val3 val1|val4|val5 val6|val4|val5 val2|val7|val5 val3|val7|val3 END open my $fh , "<", \$data or die "can't open input file $!"; my @headers = split /[|\n]/, <$fh>; my %seen; while( <$fh> ) { my @row = split /[|\n]/; $seen{$_}{shift @row}++ for @headers; } print join "\n", "UNIQUE VALUES for $_:", (sort keys %{ $seen{$_} }), +"\n" for @headers;

Outputs:

UNIQUE VALUES for head1: val1 val2 val3 val6 UNIQUE VALUES for head2: val2 val4 val7 UNIQUE VALUES for head3: val3 val5

In reply to Re: Get unique fields from file by tybalt89
in thread Get unique fields from file by sroux

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