Once you have your files read in using  push(@{$health{$patient}},$level); you should end up with a structure like so: 
%health = (
    'John Kay' => [151,128],
    'Sally Gi' => [174,145],
);

[download]
You can then iterate through the hash of arrays using while or for: 
while ( my ($patient,$levels) = each %health ) {
    my @ascending = sort {$a <=> $b} @$levels;
    print "$patient: @ascending\n";
}

for my $patient ( keys %health ) {
    my $levels = $health{$patient};
    my @descending = sort {$b <=> $a} @$levels;
    print "$patient: @descending\n";
}

[download]
Output: 
John Kay: 128 151
Sally Gi: 145 174

John Kay: 151 128
Sally Gi: 174 145

[download]

In reply to Re: Push Function and Hash by tangent
in thread Push Function and Hash by eepvesity

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