It won't notice 'Valentine's' as a path that needs to be created,

That's not what I see. I see it creating path "Valentine's Day" twice and path "Valentine's" twice. 

Valentine's Day
Valentine's Day created new path!
Valentine's Day|Cards
Valentine's Day created new path!
Valentine's Day|Flowers
Valentine's     created new path!
Valentine's|Candy
Valentine's     created new path!
Valentine's|Telegrams

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For some reasons, you commented out use warnings; which tells you why you're creating the same path more than once.

By the way, 

$prev_path !~ /^$parent$/

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can fail since $parent contains plain text, not a regex pattern. You want 

$prev_path !~ /^\Q$parent\E$/

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or just 
$prev_path ne $parent

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In reply to Re: Tree path analyzer regex problem (maybe other issues)? by ikegami
in thread Tree path analyzer regex problem (maybe other issues)? by bryank

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