Accesses the element at the specified position.
- Xcode 6.3+
- Swift Standard Library
The position of the element to access.
indexmust be greater than or equal to
startand less than
The following example uses indexed subscripting to update an array’s second element. After assigning the new value (
"Butler") at a specific position, that value is immediately available at that same position.
Complexity: Reading an element from an array is O(1). Writing is O(1) unless the array’s storage is shared with another array or uses a bridged
NSArray instance as its storage, in which case writing is O(n), where n is the length of the array.