Swifty selection sort

selectionsort.swift

func selectionSort<T: Comparable>(_ a:[T]) -> [T] {
    guard array.count > 1 else { return array }
    
    var array = a
    for i in 0..<array.count {
        
        if let min = Array(array[i..<array.count]).min() {
            if let idx = array.index(of: min) {
                array.swapAt(i, idx)
            }
        }
    }
    return array
}

var array = [8, 5, 4, 2, 1]
selectionSort(array)