Small change needed, use the anonymous array syntax: 
my %h = ( 'a1' => 1, '001' => 1, '993' => 1, 'd' => 1, 'i' => 1) ;
my $arr_ref = [(grep ( /[[:alpha:]]/, (keys(%h)) ))] ;

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In reply to Re: need an array ref from grep by monkey_boy
in thread need an array ref from grep by jeanluca

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