Removing objects from an array based on another array

Question

I have two arrays like this:

var arrayA = [\"Mike\", \"James\", \"Stacey\", \"Steve\"]
var arrayB = [\"Steve\", \"Gemma\", \"James\", \"Lucy\"]

Answer 1

Using the Array → Set → Array method mentioned by Antonio, and with the convenience of an operator, as freytag pointed out, I've been very satisfied using this:

// Swift 3.x/4.x
func - (lhs: [Element], rhs: [Element]) -> [Element]
{
    return Array(Set(lhs).subtracting(Set(rhs)))
}