@loop_names = map /$row_data{FULL_NAME}/ ? () : $_, @loop_names;

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@loop_names doesn't contain strings, it has hashrefs, which stringify to something useless. So that's not going to work. Also, grep is used for filtering elements of a list.

In reply to Re: Get only unique values into array by Anonymous Monk
in thread Get only unique values into array by Anonymous Monk

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