Returns the first index where the specified value appears in the collection.
- iOS 7.0+
- macOS 10.9+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 2.0+
- Xcode 10.0+
An element to search for in the collection.
The first index where
element is found. If
element is not found in the collection, returns
first to find the position of a particular element in a collection, you can use it to access the element by subscripting. This example shows how you can modify one of the names in an array of students.
Complexity: O(n), where n is the length of the collection.