---
title: "isStrictSuperset(of:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/set/isstrictsuperset(of:)-58ejg"
---

# isStrictSuperset(of:)

Returns a Boolean value that indicates whether the set is a strict superset of the given sequence.

## Declaration

```swift
func isStrictSuperset<S>(of possibleStrictSubset: S) -> Bool where Element == S.Element, S : Sequence
```

## Parameters

- `possibleStrictSubset`: A sequence of elements. possibleStrictSubset must be finite.

## Return Value

Return Value true if the set is a strict superset of possibleStrictSubset; otherwise, false.

## Discussion

Discussion Set A is a strict superset of another set B if every member of B is also a member of A and A contains at least one element that is not a member of B. let employees: Set = ["Alicia", "Bethany", "Chris", "Diana", "Eric"] let attendees = ["Alicia", "Bethany", "Diana"] print(employees.isStrictSuperset(of: attendees)) // Prints "true" print(employees.isStrictSuperset(of: employees)) // Prints "false"

## See Also

### Comparing Sets

- [==(_:_:)](swift/set/==(_:_:).md)
- [!=(_:_:)](swift/set/!=(_:_:).md)
- [isSubset(of:)](swift/set/issubset(of:)-1d7pp.md)
- [isSubset(of:)](swift/set/issubset(of:)-6qyo5.md)
- [isStrictSubset(of:)](swift/set/isstrictsubset(of:)-96vc3.md)
- [isStrictSubset(of:)](swift/set/isstrictsubset(of:)-787sx.md)
- [isSuperset(of:)](swift/set/issuperset(of:)-9iz62.md)
- [isSuperset(of:)](swift/set/issuperset(of:)-90hri.md)
- [isStrictSuperset(of:)](swift/set/isstrictsuperset(of:)-4d27m.md)
- [isDisjoint(with:)](swift/set/isdisjoint(with:)-8ngmk.md)
- [isDisjoint(with:)](swift/set/isdisjoint(with:)-2onid.md)