member

问题 I want to access a member of the MainFragment class from PersonAdapter class but none of them are available. I tried making both the classes and the members public and private also but so far nothing worked. I guess I'm missing something obvious but I just can't figure it out. class MainFragment : Fragment() { lateinit var personAdapter: PersonAdapter lateinit var personListener: OnPersonSelected private var realm: Realm by Delegates.notNull() lateinit var realmListener: RealmChangeListener

问题 Is there any Java syntax to access new methods defined within anonymous inner classes from outer class? I know there can be various workarounds, but I wonder if a special syntax exist? For example class Outer { ActionListener listener = new ActionListener() { @Override void actionPerformed(ActionEvent e) { // do something } // method is public so can be accessible public void MyGloriousMethod() { // viva! } }; public void Caller() { listener.MyGloriousMethod(); // does not work! } } MY OWN

问题 This question already has answers here : How to avoid having class data shared among instances? (7 answers) Closed last year . I started coding in python a week ago, it is my mistake i started coding using oops,classes and objects that soon. I assumed my C++ proficiency will help.... I got bit by the following code class A: var=0 list=[] def __init__(self): pass Here to my surprise, var and list are kinda global variable, it is shared across all instances it seems.... What I thought was it

问题 I have a class that should have a private member of the same class, something like: class A { private: A member; } But it tells me that member is an incomplete type. Why? It doesn't tell me incomplete type if I use a pointer, but I'd rather not use a pointer. Any help is appreciated 回答1: At the time you declare your member, you are still defining the A class, so the type A is still undefined. However, when you write A* , the compiler already knows that A stands for a class name, and so the

问题 I was looking at the Java code for LinkedList and noticed that it made use of a static nested class, Entry . public class LinkedList<E> ... { ... private static class Entry<E> { ... } } What is the reason for using a static nested class, rather than an normal inner class? The only reason I could think of, was that Entry doesn't have access to instance variables, so from an OOP point of view it has better encapsulation. But I thought there might be other reasons, maybe performance. What might

问题 The error occurs on line 42: $result->bind_param("ssssisssss", $Firma, $Partner, $Abteilung, $Strasse, $PLZ, $Ort, $Telefon, $Email, $Website, $Info ); This is the whole prepared statement: $sql = "INSERT INTO `firmen` (`Firma`, `Ansprechpartner`, `Abteilung`, `Strasse`, `PLZ`, `Ort`, `Telefon`, `Email`, `Website`, `Zusatzinfos`) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)"; $result = $db->prepare( $sql ); $result->bind_param("ssssisssss", $Firma, $Partner, $Abteilung, $Strasse, $PLZ, $Ort,

问题 I need to connect a button to a member function from another class. Here the class' code : int g_switch_value = 0; int filterInt = 0; int lastfilterInt = -1; void MoyenEtMedian::switch_callback(int position, void* object) { MoyenEtMedian* moyetmed = (MoyenEtMedian*) object; filterInt = position; } void MoyenEtMedian::exec(void) { const char* name = "Filtres"; IplImage* img = cvLoadImage( "image.png" ); IplImage* out = cvCreateImage( cvGetSize(img), IPL_DEPTH_8U, 3 ); cvNamedWindow( name, 1 );

问题 Having read the question from Is it possible to write a C++ template to check for a function's existence?, and tested a few of the answers, I find it only works on detecting functions that take no parameters, EG void HelloWord(). Searching around for answers either just gives solutions to parameterless functions or eye-wateringly complex solutions that I can't make head nor tail of. Here's my macro template code for constructing detectors: #define MEMBERFUNCTIONTODETECT(CONTAINS_NAME

问题 How do I access a static member in a class with all static methods? I want to have a group of related functions but also have some important data members initialized before any of these functions are called. I thought a class with only static members would be the way to go. Compiler in VS2008 doesn't like me trying to access "a". Surely I'm missing something small but still very confused. :P (Even without the invalid access of "a" the constructor isn't called when calling testMethod() from