interface

问题 I'd like to create a generic TypeScript class for rendering (as a HTML list) of an array of objects which implement a specific interface . e.g. class GenericListRenderer<T> { items: T[]; constructor(listItems: T[], className?: string){ this.items = listItems; ... } private getPropertyNames(): string[]{ // What is the best way to access all property names defined in // TypeScript interface 'T' that was used in this generic? ... } render(){ var propNames: string[] = this.getPropertyNames(); //

问题 This is just a test application, There is only a AppDelegate class to create all I did was create a Window based app, set the supported orientations to only the landscape in the info.plist, and then add the following code: - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { [application setStatusBarOrientation:UIInterfaceOrientationLandscapeLeft]; // Override point for customization after application launch. UIAlertView *test = [

问题 This question already has answers here : Closed 8 years ago . Possible Duplicates: marker interface What is the purpose of a marker interface? I know what is marker interface - An interface with no methods. Example: Serializable, Remote, Cloneable. I am wondering what is the purpose of marker inteface. This is my understanding:- Basically it is just to identify the special objects from normal objects. Like in case of serialization , objects that need to be serialized must implement

问题 Revising some past exam papers for an exam mainly focus on component-oriented design and J2EE, I have come across the following question: A preliminary investigation of scenario 3: “Exchange Request” suggests that two EJBs will provide a suitable solution: a session bean called EnterExchangeRequest to control the processing and an entity bean called ExchangeRequest to represent the persistent properties of the request. Discuss the role of the following interfaces: Home Remote LocalHome Local

问题 I've been looking in to the new Swift language trying to find what's the equivalent for an interface(in java) or a protocol(in objective-c) in Swift, after surfing on the internet and searching in the book provided by Apple, I still can't seem to find it. Does any one know what's the name of this component in swift and what's its syntax? 回答1: Protocols in Swift are very similar to Objc, except you may use them not only on classes, but also on structs and enums. protocol SomeProtocol { var

问题 I have the following implementation that gives a compiler error: public enum FusionStat implements MonsterStatBuilderHelper { ATTACK { @Override public MonsterCard.MonsterCardBuilder safeCreateBuilder(final MonsterCard baseMonsterCard, final MonsterCard fusedMonsterCard, final FusionCard fusionCard) { Objects.requireNonNull(baseMonsterCard); Objects.requireNonNull(fusedMonsterCard); Objects.requireNonNull(fusionCard); if (baseMonsterCard.equals(fusedMonsterCard)) { throw new

问题 Method signature in Java: public List<String> getFilesIn(List<File> directories) similar one in ruby def get_files_in(directories) In the case of Java, the type system gives me information about what the method expects and delivers. In Ruby's case, I have no clue what I'm supposed to pass in, or what I'll expect to receive. In Java, the object must formally implement the interface. In Ruby, the object being passed in must respond to whatever methods are called in the method defined here. This

问题 Coming from an Eclipse / Java background, one of my favorite features is the ability to quickly stub out all the methods required by an interface. In Eclipse, I can choose 'Override / implement' from the source menu to generate stub methods for any method of the Interface. I'd like to do the same thing in Objective-C. For instance, if I declare a class that implements the 'NSCoding' protocol, I'd like to have Xcode automatically generate the methods required to implement this Protocol. It's

问题 In the Java tutorial "Defining an Interface", it says If you do not specify that the interface is public , your interface will be accessible only to classes defined in the same package as the interface. However, this interface PPInterface { void foo(); void bar(); } class NewClass implements PPInterface { void foo() {} void bar() {} } generates compiler errors in NewClass because I am 'attempting to assign weaker access privileges; was public'. So the documentation is wrong, or I did

问题 I've seen the following code layout reading forums and other blog posts and adapted in order to ask a few questions. public interface IService<T> { int Add(T entity); void Update(T entity); } public abstract class ServiceBase<T> : IService<T> { public int Add(T entity) { ... } public void Update(T entity) { ... } } public interface ICarService : IService<Car> { } public class SomeBaseClass : ServiceBase<Car>, ICarService { public int Add(Car entity); public void Update(Car entity); } What I