clamp() in Swift

Clamp.swift

///Returns the input value clamped to the lower and upper limits.
func clamp<T: Comparable>(value: T, lower: T, upper: T) -> T {
	return min(max(value, lower), upper)
}


//-----------------------------------------------
// Example usage

let proposedIndex = 6
let i = clamp(proposedIndex, 0, 5)


// What clamp() replaces
func getIndex(proposedIndex: Int) -> Int {

    if proposedIndex < 0 {
        return 0
    }
    else if proposedIndex <= 5 {
        return proposedIndex
    }
    else {
        return 5
    }
}