use UNIVERSAL qw( isa ); # deprecated - warns if( isa($thing, 'ARRAY') ) {
if( UNIVERSAL::isa($thing, 'ARRAY') ) { # Frowned upon
use UNIVERSAL qw( isa ); # deprecated - warns if( isa($thing, 'ARRAY') ) {
if( UNIVERSAL::isa($thing, 'ARRAY') ) { # Frowned upon