# libtmux._internal.sparse_array.SparseArray.add

- **Module:** libtmux._internal.sparse_array.SparseArray
- **Package:** libtmux
- **Language:** Python
- **Kind:** method
- **Source:** https://github.com/tmux-python/libtmux/blob/036c521c4b83ce6e434eb50afe2a0d08a6a05e46/src/libtmux/_internal/sparse_array.py#L90
- **Page:** https://libtmux.org/reference/py/libtmux-_internal-sparse_array-sparsearray-add/

```
libtmux._internal.sparse_array.SparseArray.add(self, index: int, value: T) -> None
```

Add a value at a specific index.

## Parameters

- `self`
- `index` (int) — The index at which to store the value.
- `value` (T) — The value to store.

## Example

```python
>>> from libtmux._internal.sparse_array import SparseArray
```

## Example

```python
>>> arr: SparseArray[str] = SparseArray()
>>> arr.add(0, "hook at index 0")
>>> arr.add(10, "hook at index 10")
>>> arr[0]
'hook at index 0'
>>> arr[10]
'hook at index 10'
>>> sorted(arr.keys())
[0, 10]
```