Added by Cameron Kenneth Knight
Definition: Struct - Short for structure, a term meaning a data group made of related variables.
The main way
structs are different than
classes is that they are value types instead of a reference types. This means that whenever you return this value, or set one equal to another, it is actually copying the data not a reference to the data. This is handy, because if it is declared without a value, it will default to something besides
null. It also cannot be compared to
null. This eliminates a lot of error checking associated with reference types.
Structs also cannot inherit from
classes, nor can
classes inherit from
Structs can however, inherit from
Unlike some other languages,
structs can have methods.
Declaring a struct is very similar to declaring a
class, except that the name is changed.
struct Coordinate: def constructor(x as int, y as int): _x = x _y = y _x as int _y as int c as Coordinate print c._x, c._y c = Coordinate(3, 5) print c._x, c._y // Output: // 0 0 // 3 5
Here you can see that the
struct was instanced without being called, showing the how a
struct is a value.
Go on to Part 12 - Namespaces