#! perl
use strict;
use warnings;
use Heap::Priority;

printf "%6d  %s\n", length($_), $_ for get_N_longest(10, 'wordsEn.txt'
+);

sub get_N_longest
{
    my ($min, $infile) = @_;

    open my $infh, '<', $infile
        or die "Cannot open file '$infile' for reading: $!";

    my $heap = Heap::Priority->new;
       $heap->highest_first;

    while (<$infh>)
    {
        chomp;
        $heap->add($_, length $_);
    }

    close $infh or die "Cannot close file '$infile': $!";

    my @priorities = $heap->get_priority_levels;
    my @r;

    while (@r < $min)
    {
        my $priority = shift @priorities;
        push @r, $heap->get_level($priority);
    }

    return @r;
}
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22:35 >perl heap.pl
    28  antidisestablishmentarianism
    25  antidisestablishmentarian
    23  disestablismentarianism
    23  electroencephalographic
    22  counterclassifications
    22  counterrevolutionaries
    22  electroencephalographs
    22  electroencephalography
    21  antienvironmentalists
    21  antiinstitutionalists
    21  counterclassification
    21  electroencephalograms
    21  electroencephalograph
    21  electrotheraputically
    21  gastroenterologically
    21  internationalizations
    21  mechanotheraputically
    21  microminiaturizations
    21  microradiographically

22:35 >
[download]