Returns a subsequence containing all but the specified number of final elements.
func dropLast(_ k: Int) -> Self.SubSequence
The number of elements to drop off the end of the collection.
kmust be greater than or equal to zero.
A subsequence that leaves off
k elements from the end.
If the number of elements to drop exceeds the number of elements in the collection, the result is an empty subsequence.
let numbers = [1, 2, 3, 4, 5] print(numbers.dropLast(2)) // Prints "[1, 2, 3]" print(numbers.dropLast(10)) // Prints ""