---
name: "Array+="
type: topic
source: https://community.bistudio.com/wiki/Array%2B%3D
revid: 373440
updated: 2025-05-08T11:27:12Z
---
# Array+=
Arma 3 v0.50 same-file support\
Arma 3 v1.00 full support
The `array[] += {}` syntax allows to add items to an existing array inherited from the direct parent.
> [!IMPORTANT]
> - This syntax has limitations in inheritance - see [Limitations](../topics/Array~2B~3D.md#limitations).
> - This syntax should **not** be used in [Description.ext](../topics/Description.ext.md) - only in modded [config.cpp](../topics/Config.cpp~2Fbin_File_Format.md).
### Usage
```cpp
class A
{
array[] = { any, thing };
};
class B : A
{
array += { more, Bstuff };
};
class C : A // inherits from A, -not- B
{
array += { other, Cstuff };
};
```
### Limitations
Only **direct inheritance** of an explicitly-stated array works. The following cases do **not** work:
| | |
|---|---|
| ```cpp
class A { array[] = { any, thing }; };
class B : A {};
class C : B // inherits from B which inherits from A (without changes)
{
array[] += { wont, work }; // result: array[] = { wont, work };
};
``` | ```cpp
class A { array[] = { any, thing }; };
class B : A { array[] += { more, stuff }; };
class C : B // inherits from B which inherits from A (with += changes)
{
array[] += { wont, work }; // result: array[] = { wont, work };
};
``` |
Source: [BI Community Wiki — Array+=](https://community.bistudio.com/wiki/Array%2B%3D) (revision 373440).