Object-Oriented Programming (OOP)
================================

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Rhai does not have _objects_ per se, but it is possible to _simulate_ object-oriented programming.


Use [Object Maps] to Simulate OOP
--------------------------------

Rhai's [object maps] has [special support for OOP]({{rootUrl}}/language/object-maps-oop.md).

| Rhai concept                                          | Maps to OOP |
| ----------------------------------------------------- | :---------: |
| [Object maps]                                         |   objects   |
| [Object map] properties holding values                | properties  |
| [Object map] properties that hold [function pointers] |   methods   |


Examples
--------

```rust
// Define the object
let obj = #{
                data: 0,
                increment: Fn("add"),       // when called, 'this' binds to 'obj'
                update: Fn("update"),       // when called, 'this' binds to 'obj'
                action: Fn("action")        // when called, 'this' binds to 'obj'
           };

// Define functions
fn add(x)       { this.data += x; }         // update using 'this'
fn update(x)    { this.data = x; }          // update using 'this'
fn action()     { print(this.data); }       // access properties of 'this'

// Use the object
obj.increment(1);
obj.action();                               // prints 1

obj.update(42);
obj.action();                               // prints 42
```