$count is a misnomer in your new code. If you change what a variable contains, you need to change its name too.

Minimal fix (<= ⇒ <): 

my $count = @{ $doc->{$sub1} };
for (my $i=0; $i<$count; $i++)

[download]

Easier to read: 

my $count = @{ $doc->{$sub1} };
for my $i ( 0 .. $count-1 )

[download]

Alternative: 

my $last = $#{ $doc->{$sub1} };
for my $i ( 0 .. $last )

[download]

In reply to Re^2: Nested Loops vs Good programming by ikegami
in thread Nested Loops vs Good programming by Sporti69

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