Sorry. I never got back to checking the fix properly.

Would you please try replacing the last line with this (note:pre-decrement not post-decrement). 

    return \@best, [ grep{ !exists $seen{ $_ } or !--$seen{ $_ } } @$a
+Ref ];

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In reply to Re^5: Divide array of integers into most similar value halves by BrowserUk
in thread Divide array of integers into most similar value halves by Pepe

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