---
title: withArray
framework: driverkit
role: symbol
role_heading: Static Method
path: driverkit/osset/witharray
---

# withArray

Creates and initializes an OSSet populated with the contents of an OSArray.

## Declaration

```occ
static OSSetPtr withArray(const OSArray *array, uint32_t capacity);
```

## Parameters

- `array`: An array whose objects will be stored in the new OSSet.
- `capacity`: The initial storage capacity of the new set object. If 0, the capacity is set to the number of objects in array; otherwise capacity must be greater than or equal to the number of objects in array.

## Return Value

Return Value An instance of OSSet containing the objects of array, with a retain count of 1; NULL on failure.

## Discussion

Discussion Each distinct object in array is added to the new set. array must be non-NULL. If capacity is nonzero, it must be greater than or equal to count. The new OSSet will grow as needed to accommodate more key-object pairs (unlikeCFMutableSet, for which the initial capacity is a hard limit). The objects in array are retained for storage in the new set, not copied.