小编Nik*_*ola的帖子

我注意到我的代码看起来很丑，而且很难维护。基本上我需要对某人进行检查。伪代码是这样的（顺便说一句，我无法在查询中“剪切”任何内容，这并不是我的问题的重点）：

List<Person> persons = getPersonsBySomeQuery();

if (checkAnyPersonExists(persons)) {
  if (atLeastOneWithGivenNameExist(persons)) {
    if (noOneWithOtherNameExists(persons)) {
      filteredPersons = filterPersonsWithGivenName(persons);
      if (singleName(filteredPersons)) {
        // single person found
        if (someParameterFromQueryIsTrue) {
          if (someComplicatedLogicIsOK) {
            // found exactly one person, all OK!!!
          } else {
            // found exatcly one person with given name, but not OK
          }
        } else {
           // found exactly one person but parameter from query is not OK
        }
      } else {
        // found only persons with given name, but more …