實例方法
remove
removeFirst(_:)
從集合的開頭移除指定數量的元素。
聲明
mutating func removeFirst(_ k: Int)
參數
k
要從集合中刪除的元素數。
k
必須大於或等於零,並且不得超過集合中的元素數。
詳述
var bugs = ["Aphid", "Bumblebee", "Cicada", "Damselfly", "Earwig"]
bugs.removeFirst(3)
print(bugs)
// Prints "["Damselfly", "Earwig"]"
調用此方法可能會使用於此集合的任何現有索引無效。
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 String.UnicodeScalarView removeFirst(_:)。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。