Ruckus
09/06/2017, 9:01 PMvar numberArray = [1, 2, 3, 4, 5]
var newArray = numberArray.map { $0 * 2 }
Kotlin
val numberArray = intArrayOf(1, 2, 3, 4, 5)
val newArray = numberArray.map { it * 2 }
(I'm not familiar with Swift. I grabbed that from an example, so I have no idea if it's idiomatic.)