Dec 16, 2009 · An interface is a good example of loose coupling (dynamic polymorphism/dynamic binding) An interface implements polymorphism and abstraction.It tells what to do but how to do is defined by the implementing class.

May 19, 2010 · An interface promises nothing about an action! The source of the confusion is that in most languages, if you have an interface type that defines a set of methods, the class that implements it "repeats" the same methods (but provides definition), so the interface looks like a skeleton or an outline of the class.

Jun 25, 2014 · If both interfaces have a method of exactly the same name and signature, the implementing class can implement both interface methods with a single concrete method. However, if the semantic contracts of the two interface method are contradicting, you've pretty much lost; you cannot implement both interfaces in a single class then.

147 You can define an interface as array with simply extending the Array interface. export interface MyInterface extends Array<MyType> { } With this, any object which implements the MyInterface will need to implement all function calls of arrays and only will be able to store objects with the MyType type.

To expand on what Peter said: Since you are looking to go from interface {} to string, type assertion will lead to headaches since you need to account for multiple incoming types.

Nov 26, 2008 · How do I setup a class that represents an interface? Is this just an abstract base class?

Hi, interface and type, looks similar but interfaces can use for "Declaration merging" and "Extends and implements" which "type" cannot do.

Interface - describe the behavior Class - do the behavior A class extending another class inherits the behavior. On the other hand, implementing an interface just says it need to behave that way but the class still has to know the how-to. Besides single inheritance limitations, code using interfaces are easier to refactor and test, e.g. provide a mock implementation for a database …

I have the following interface in TypeScript: interface IX { a: string, b: any, c: AnotherType } I declare a variable of that type and I initialize all the properties let x: IX = { ...

May 17, 2016 · However, I can't figure out the correct syntax. I've found plenty of tutorials on declaring interfaces and implementing them, but they all have a trivial implementation of both the interface and derived classes in the same file, which isn't very real-world. What's the right way to export and import the interfaces?