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( #3333=superdoc: print w/replies, xml ) Need Help??
It is possible to do exactly what you asked for by explicitly testing for duplicates (use the function 'none' from List::Util) before storing. Because it uses arrays, it does preserve the order of the features. This solution is probably the slowest running of all the suggestion you received.
?type #!/usr/bin/perl use strict; use warnings; use List::Util qw(none); use Data::Dumper; my $file = \<<'EOF'; bird beak bird beak bird claw bird wings bird feathers snake fangs snake scales snake fangs snake tail EOF #my $file = 'file.txt'; open( FILE, '<', $file ) or die $!; my %hash; while ( <FILE> ) { chomp; my $lines = $_; my ($key, $value) = split(/\s+/, $lines, 2); push @{ $hash{$key} }, $value if none {$value eq $_} @{$hash{$key} +}; } print Dumper(\%hash); ?perl $VAR1 = { 'snake' => [ 'fangs', 'scales', 'tail' ], 'bird' => [ 'beak', 'claw', 'wings', 'feathers' ] }; ?

In reply to Re: assigning arrays as values to keys of hash by BillKSmith
in thread assigning arrays as values to keys of hash by pearllearner315

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