分解成個體變數

可以使用以下語法將元組分解為單個變數:

let myTuple = (name: "Some Name", age: 26)
let (first, second) = myTuple

print(first) // "Some Name"
print(second)  // 26

無論元組是否具有未命名的屬性,都可以使用此語法:

let unnamedTuple = ("uno", "dos")
let (one, two) = unnamedTuple
print(one) // "uno"
print(two) // "dos"

使用下劃線(_)可以忽略特定屬性:

let longTuple = ("ichi", "ni", "san")
let (_, _, third) = longTuple
print(third) // "san"