The fact is, your code works fine, unless owo.txt is empty, and opening it like 
open (OWO, "+>$owo") or die $!;
#in read-write mode seems to clear it

#this line made it work fine for me... (in linux anyway)
open (OWO, $owo) or die $!;

[download]
you might also want to do 
chomp(@ary = <OWO>);

[download]
to get rid of trailing newlines... up to you...

if you do care about order from the file, you the suggestions others have posted.

                - Ant

In reply to Re: Deleting Duplicates in an array by suaveant
in thread Deleting Duplicates in an array by blacksmith

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