Question

ENV =发展

任何想法为什么

List<Person> persons = IntStream.rangeClosed(0, 100)
                                .mapToObj(i -> new Person(i, "name" + i))
                                .collect(Collectors.toList());

正在抛出错误

     def tidy_address(location)
       t_address=t_address+"<br>"+location.address1 if location.address1.present?
       t_address=t_address+"<br>"+location.address2 if location.address2.present?
       t_address=t_address+"<br>"+location.address3 if location.address3.present?
       t_address=t_address+"<br>"+location.postcode if location.postcode.present?
     end

我似乎将一个方法应用于字符串，但我不知道如何解决此问题

也尝试了

 undefined method `+' for nil:NilClass

接受Boozy建议

Answer 1

Doooh ......

所以这解决了它 - 我是一个旧的ASP黑客，它很懒惰

 def tidy_address(location)
   t_address="<br>"+location.address1 if location.address1.present?
   t_address=t_address+"<br>"+location.address2 if location.address2.present?
   t_address=t_address+"<br>"+location.address3 if location.address3.present?
   t_address=t_address+"<br>"+location.postcode if location.postcode.present?
 end

助手模块导致friday_night_issue ... RoR

1 个答案: