實例方法
update(with:)
將給定元素插入到集合中。
聲明
@discardableResult mutating func update(with newMember: Self.Element) -> Self.Element?
當
Self
為 Self.Element
時可用。返回值
[newMember]
的交集與非空的集合;否則,nil
。
詳述
如果集合中不包含newMember
,但包含集合的當前成員,則返回包含的成員。
var options: ShippingOptions = [.secondDay, .priority]
let replaced = options.update(with: .express)
print(replaced == .secondDay)
// Prints "true"
可用版本
iOS 8.0+, iPadOS 8.0+, macOS 10.10+, Mac Catalyst 13.0+, tvOS 9.0+, watchOS 2.0+
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注:本文由純淨天空篩選整理自apple.com大神的英文原創作品 SetAlgebra update(with:)。非經特殊聲明,原始代碼版權歸原作者所有,本譯文未經允許或授權,請勿轉載或複製。