Return Value 戻り値
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
。
Availability 有効性
Technology
func isStrictSubset(of other: Self) -> Bool
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
。
other
A set of the same type as the current set. 現在の集合と同じ型の集合。
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"