@ -361,7 +361,7 @@ favoriteGenres.insert("Jazz")
|
|||||||
|
|
||||||
```swift
|
```swift
|
||||||
if let removedGenre = favoriteGenres.remove("Rock") {
|
if let removedGenre = favoriteGenres.remove("Rock") {
|
||||||
print("\(removedValue)? I'm over it.")
|
print("\(removedGenre)? I'm over it.")
|
||||||
} else {
|
} else {
|
||||||
print("I never much cared for that.")
|
print("I never much cared for that.")
|
||||||
}
|
}
|
||||||
@ -456,7 +456,7 @@ let farmAnimals: Set = ["🐮", "🐔", "🐑", "🐶", "🐱"]
|
|||||||
let cityAnimals: Set = ["🐦", "🐭"]
|
let cityAnimals: Set = ["🐦", "🐭"]
|
||||||
houseAnimals.isSubsetOf(farmAnimals)
|
houseAnimals.isSubsetOf(farmAnimals)
|
||||||
// true
|
// true
|
||||||
farmAnimals.isSuperSetOf(houseAnimals)
|
farmAnimals.isSupersetOf(houseAnimals)
|
||||||
// true
|
// true
|
||||||
farmAnimals.isDisjointWith(cityAnimals)
|
farmAnimals.isDisjointWith(cityAnimals)
|
||||||
// true
|
// true
|
||||||
@ -495,7 +495,7 @@ Swift 的字典使用`Dictionary<Key, Value>`定义,其中`Key`是字典中键
|
|||||||
我们可以像数组一样使用构造语法创建一个拥有确定类型的空字典:
|
我们可以像数组一样使用构造语法创建一个拥有确定类型的空字典:
|
||||||
|
|
||||||
```swift
|
```swift
|
||||||
var namesOfIntegers = [Int: String]
|
var namesOfIntegers = [Int: String]()
|
||||||
// namesOfIntegers 是一个空的 [Int: String] 字典
|
// namesOfIntegers 是一个空的 [Int: String] 字典
|
||||||
```
|
```
|
||||||
|
|
||||||
|
|||||||
Reference in New Issue
Block a user