hermanwhyd

package khannedy.javatipsweekly.optional;

import java.util.Optional;

public class JavaOptional {

  public void nullCheck(Customer customer) {
    String name = Optional.ofNullable(customer.getName())
      .orElse("");

hermanwhyd

-- mysql get all childs
select  id,
        name,
        parent_id
from    (select * from tablename
         order by parent_id, id) tablename,
        (select @pv := '100') initialisation
where   find_in_set(parent_id, @pv) > 0
and     @pv := concat(@pv, ',', id)