func isStrictSuperset (of: Self) -> Bool
Returns a Boolean value that indicates whether this set is a strict superset of the given set.
この集合は与えられた集合の狭義の上位集合であるかどうかを指し示すブール値を返します。
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func isStrictSubset(of other: Self) -> Bool
other
A set of the same type as the current set. 現在の集合と同じ型の集合。
true
if the set is a strict subset of other
; otherwise, false
.
この集合がother
の狭義の部分集合ならばtrue
;そうでなければ、false
。
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. 集合Aがもう1つの集合Bの狭義の部分集合であるのは、AのすべてのメンバがまたBのメンバであり、Bが少なくとも1つのAのメンバではない要素を含む場合です。
let employees: Set = ["Alicia", "Bethany", "Chris", "Diana", "Eric"]
let attendees: Set = ["Alicia", "Bethany", "Diana"]
print(attendees.isStrictSubset(of: employees))
// Prints "true"
// A set is never a strict subset of itself:
print(attendees.isStrictSubset(of: attendees))
// Prints "false"
func isStrictSuperset (of: Self) -> Bool