Generic Instance Method

# isStrictSubset(of:)

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

## Parameters

`possibleStrictSuperset`

A sequence of elements. `possibleStrictSuperset` must be finite.

## Return Value

`true` is the set is strict subset of `possibleStrictSuperset`; otherwise, `false`.

## Discussion

Set A is a strict subset of another set B if every member of A is also a member of B and B contains at least one element that is not a member of A.

### Comparing Sets

`static func == (Set<Element>, Set<Element>) -> Bool`

Returns a Boolean value indicating whether two sets have equal elements.

`static func != (Set<Element>, Set<Element>) -> Bool`

Returns a Boolean value indicating whether two values are not equal.

`func isSubset(of: Set<Element>) -> Bool`

Returns a Boolean value that indicates whether this set is a subset of the given set.

`func isSubset<S>(of: S) -> Bool`

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

`func isStrictSubset(of: Set<Element>) -> Bool`

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

`func isSuperset(of: Set<Element>) -> Bool`

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

`func isSuperset<S>(of: S) -> Bool`

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

`func isStrictSuperset(of: Set<Element>) -> Bool`

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

`func isStrictSuperset<S>(of: S) -> Bool`

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

`func isDisjoint(with: Set<Element>) -> Bool`

Returns a Boolean value that indicates whether this set has no members in common with the given set.

`func isDisjoint<S>(with: S) -> Bool`

Returns a Boolean value that indicates whether the set has no members in common with the given sequence.