If want a specific subset of elements, then you can use a slice: 
my $item = join( ".", @code[0..2] );
my $not_item = join( ".", @code[9,7,0,3] );

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TGI says moo

In reply to Re^3: Use of uninitialized value by TGI
in thread Use of uninitialized value by Angharad

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