ecnf
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Kartei Details
| Karten | 10 |
|---|---|
| Sprache | Deutsch |
| Kategorie | Informatik |
| Stufe | Universität |
| Erstellt / Aktualisiert | 26.02.2014 / 26.02.2014 |
| Weblink |
https://card2brain.ch/box/ecnf
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| Einbinden |
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Declare Field Access
aoeu
Use Field Access
aoeu
How to implement Indexers
aoeu
Usage of Indexers
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Characteristits of Abstract Classes (4)
- Abstract methods do not have an implementation.
- Abstract methods are implicitly virtual.
- If a class has abstract methods (declared or inherited) it must be abstract itself.
- One cannot create objects of an abstract class.
Characteristics of Interfaces (12)
- Interface = purely abstract class; only signatures, no implementation.
- May contain methods, properties, indexers and events (no fields, constants, constructors, destructors, operators, nested types).
- Interface members are implicitly public abstract (virtual).
- Interface members must not be static.
- Classes and structs may implement multiple interfaces.
- Implemented by classes and structs
- A class can inherit from a single base class, but can implement multiple interfaces.
- A struct cannot inherit from any type, but can implement multiple interfaces.
- Every interface member (method, property, indexer) must be implemented or inherited from a base class.
- Implemented interface methods must not be declared as override.
- Implemented interface methods can be declared as virtual or abstract (i.e. an interface can be implemented by an abstract class).
- If subclasses of MyClass should be able to override Add() it must be declared as virtual (although Add() is already implicitly virtual in IList).
- Interfaces can extend other interfaces.
How to initialize a Multidimensional arrays (rectangle)
aoeu
imlicit and dynamic variables
Parameter modifiers
void Parameters(int i, ref int ref_i, out int out_i)
- Implications on assignment
- On return value
variable number of params
void Parameters(int i, params int[] ints)
- Must be the last parameter
