Contents

subtract(_:)

Removes the elements of the given sequence from the set.

Declaration

mutating func subtract<S>(_ other: S) where Element == S.Element, S : Sequence

Parameters

  • other:

    A sequence of elements. other must be finite.

Discussion

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

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

See Also

Combining Sets