And what do you get? Does it run w/o warnings? Do you still get duplicates? Are you aware that you only remove duplicates from the same $file but that there could be duplicates across? Change your printing to 

print $fh "$file:$emails\n"; # write the emails to file

[download]

to check from which file your emails are retrieved from.

In reply to Re^3: Help with removing duplicates in array by hdb
in thread Help with removing duplicates in array by beanscake

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