實例方法
lexicographically
lexicographicallyPrecedes(_:)
返回一個布爾值,指示該序列是否在字典(字典)排序中位於另一個序列之前,使用小於運算符 (
<
) 比較元素。聲明
func lexicographicallyPrecedes<OtherSequence>(_ other: OtherSequence) -> Bool where OtherSequence : Sequence, Self.Element == OtherSequence.Element
當
Element
符合 Comparable
時可用。返回值
true
如果此序列在字典排序中位於 other
之前;否則,false
。
參數
other
要與此序列進行比較的序列。
詳述
此示例使用 lexicographicallyPrecedes
方法來測試在字典順序中哪個整數數組排在第一位。
let a = [1, 2, 2, 2]
let b = [1, 2, 3, 4]
print(a.lexicographicallyPrecedes(b))
// Prints "true"
print(b.lexicographicallyPrecedes(b))
// Prints "false"
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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