RegexPattern.Options.subtract(_:)

In the following example, the elements of the employees set that are also members of the neighbors set are removed. In particular, the names "Bethany" and "Eric" are removed from employees.

var employees: Set = ["Alicia", "Bethany", "Chris", "Diana", "Eric"] let neighbors: Set = ["Bethany", "Eric", "Forlani", "Greta"] employees.subtract(neighbors) print(employees) // Prints "["Diana", "Chris", "Alicia"]"

• Parameter other: A set of the same type as the current set.