ArrayOperators.swift

func -<T: Equatable> (lhs: Array<T>, rhs: Array<T>) -> Array<T> {
    return lhs.filter({ (lv) -> Bool in
        return false == rhs.contains(lv)
    })
}

func |<T: Equatable> (lhs: [T], rhs: [T]) -> [T] {
    return lhs + rhs.filter({ (rv) -> Bool in
        return false == lhs.contains(rv)
    })
}

func ^<T: Equatable> (lhs: [T], rhs: [T]) -> [T] {
    return lhs.filter({ false == rhs.contains($0)}) + rhs.filter({ false == lhs.contains($0)})
}

prefix func !<T: Equatable> (target: [T]) -> [T] {
    return target.reversed()
}

var a = [1.0, 10.0, 120.0, 32.0, 15.0, 1.0]
var b = [10.0, 11.0, 12.0, 13.0, 1.0]

print("a = (a)")
print("b = (b)")
print("a - b = (a - b)")
print("a | b = (a | b)")
print("a ^ b = (a ^ b)")
print("!a = (!a)")

->

a = [1.0, 10.0, 120.0, 32.0, 15.0, 1.0]
b = [10.0, 11.0, 12.0, 13.0, 1.0]
a - b = [120.0, 32.0, 15.0]
a | b = [1.0, 10.0, 120.0, 32.0, 15.0, 1.0, 11.0, 12.0, 13.0]
a ^ b = [120.0, 32.0, 15.0, 11.0, 12.0, 13.0]
!a = [1.0, 15.0, 32.0, 120.0, 10.0, 1.0]