Beginner
Swift
Q39 / 100
What is higher-order function map in Swift?
Correct! Well done.
Incorrect.
The correct answer is B) Applies a transformation to each element in a collection and returns a new array
B
Correct Answer
Applies a transformation to each element in a collection and returns a new array
Explanation
[1, 2, 3].map { $0 * 2 } returns [2, 4, 6]. map, filter, reduce, and flatMap are core Swift collection functions.
Progress
39/100