Functional Swift: Filter Function: For a given list with integers, return a new list removing the elements at odd positions.

https://www.hackerrank.com/challenges/fp-filter-positions-in-a-list/problem

import Foundation

func filterOddElements(_ list: [Int]) -> [Int] {
    if list.count <= 1 {
        return []
    }

    let elements = list.prefix(2)
    let oddElement = elements.last!
    let newList = Array(list.dropFirst(2))
    return [oddElement] + filterOddElements(newList)
}

print(filterOddElements([5, 3, 4, 6, 7, 9, 8]))
print(filterOddElements([2, 5, 3, 4, 6, 7, 9, 8]))