假设我们有一个名为SomeClass的java类publicclassSomeClass{privatebooleanisMethod(){returnfalse;}publicvoidsendRequest(Stringjson,Stringtext){intmessageId;if(isMethod()){messageId=getMessageId(json);sendMessage(messageId,text);}else{thrownewIllegalArgumentException();}}privatevoidsendMessage(intmessageId,Stri

编辑:发生这种情况是因为我通过带有可选链接的属性和/或方法访问SomeArrayWrapper实例。我已经更新了我的例子。今天早上我在将项目更新到Swift2.2时遇到了问题。这是我所拥有的示例://wrapsanarrayclassSomeArrayWrapper{varprivateArray=[T]()//returnscountfromprivatearrayvarcount:Int{get{returnself.privateArray.count}}}classSomeClass{varlist:SomeArrayWrapper?}letsomeInstance=SomeC

这个问题在这里已经有了答案:Can'tsetattributesoninstanceof"object"class(7个答案)关闭7年前。这个有效:classMyClass(object):passsomeinstance=MyClass()someinstance.myattribute=42printsomeinstance.myattribute>>>42但这不是:someinstance=object()someinstance.myattribute=42>>>AttributeError:'object'objecthasnoattribute'myattribute'为什

给定以下代码，如何在autofac中解析正确的SomeInstance？publicclassBaseClass{}publicclassSubClass1:BaseClass{}publicclassSubClass2:BaseClass{}publicinterfaceIGenericInterfacewhereT:BaseClass{}publicclassSomeInstance1:IGenericInterfacewhereT:SubClass1publicclassSomeInstance2:IGenericInterfacewhereT:SubClass2我想根据子类的泛

给定以下代码，如何在autofac中解析正确的SomeInstance？publicclassBaseClass{}publicclassSubClass1:BaseClass{}publicclassSubClass2:BaseClass{}publicinterfaceIGenericInterfacewhereT:BaseClass{}publicclassSomeInstance1:IGenericInterfacewhereT:SubClass1publicclassSomeInstance2:IGenericInterfacewhereT:SubClass2我想根据子类的泛