hmm... this looks really awkward: 
my %list_o_num = map {
                         if(exists $list_o_num{$_})
                         {  $list_o_num{$_}++  }
                         else
                         {  $_ => 1  }
                     }
                 @list_o_num;

[download]
For one thing, you are using a hash in the same line as you declare it with my... thats bad... I think you are trying to do something like: 
my %list_o_num;
$list_o_num{$_}++ for @list_o_num;

my @true_top_3 = (sort { $b <=> $a } keys %list_o_num)[0..2];

print "T3: ", join(', ',@true_top_3), "\n";

[download]
but I can't quite tell.

I would probably write that like so: 

#!/usr/bin/perl -wT
use strict;

my @list_o_num = qw(9 9 9 10 9 8 7 9 6);
my %seen;
my @true_top_3 = (sort { $b <=> $a }
                       grep {!$seen{$_}++}
                            @list_o_num)[0..2];

print "T3: ", join(', ',@true_top_3), "\n";

[download]

-Blake

In reply to Re: Answer: Find largest ordered sequence in an array by blakem
in thread How to find the N largest values in an array? by dubx56

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