Returns an array containing the results of mapping the given closure over the sequence’s elements.
- iOS 7.0+
- macOS 10.9+
- tvOS 9.0+
- watchOS 2.0+
- Xcode 10.0+
- Mac Catalyst 13.0+Beta
A mapping closure.
transformaccepts an element of this sequence as its parameter and returns a transformed value of the same or of a different type.
An array containing the transformed elements of this sequence.
In this example,
map is used first to convert the names in the array to lowercase strings and then to count their characters.