Question

How to transform each element in array based on a mapping function in Swift

Answer 1

func multiply (n: Int) -> Int {
    return n * 3
}

var arr = [2, 8, 4, 5]

print(arr)

arr = arr.compactMap(multiply)

print(arr)



/*
run:

[2, 8, 4, 5]
[6, 24, 12, 15]

*/

 

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