Very good point, sir. I was assuming that is_name() returned the parameter given, or a false value. But you are correct: it could be altering/enhancing the parameter or returning anything else. Thus: 
@A = map { uc(is_name($_)) } grep { is_name($_) } @a;

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In reply to Re^5: using shift and $_ in loop by keszler
in thread using shift and $_ in loop by leocharre

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