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Why do we use func in C#?
We use Func<> to represent a method that returns something. If the function has parameters, the first generic argument(s) represent those parameters. The last generic argument indicates the return type.
What’s the difference between function and method?
A function is a piece of code that is called by name. It can be passed data to operate on (i.e. the parameters) and can optionally return data (the return value). All data that is passed to a function is explicitly passed. A method is a piece of code that is called by a name that is associated with an object.
What are the advantages of delegates in C#?
Important Sticky
- Delegates allow methods to be passed as parameters.
- Delegates are type safe function pointer.
- Delegate instances attach or detach a method at run time making it more dynamic and flexible to use.
- Delegates can invoke more than one method using the Multicast feature.
- Delegates are of reference types.
Why are delegates used in C#?
Delegates are used to define callback methods and implement event handling, and they are declared using the “delegate” keyword. You can declare a delegate that can appear on its own or even nested inside a class. There are three steps in using delegates. These include declaration, instantiation, and invocation.
What is difference between method and function in Swift?
Some folks use “function” and “method” interchangeably, but there’s a small difference: both of them are reusable chunks of code, but methods belong to classes, structs, and enums, whereas functions do not. This is a special value passed in by Swift, and it refers to whatever instance the method was called on.
CAN interface have delegates?
An interface contains only the signatures of methods, delegates or events. However, in the remarks on the same page it says that an interface can contain signatures of methods, properties, indexers and events. If you try to put a delegate in an interface, the compiler says that “interfaces cannot declare types.”