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fix：示例代码更新 (#1147)

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Sunset Wan
2021-06-23 02:03:02 +08:00
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parent a15735f51b
commit 24d88f684a
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source/02_language_guide/16_Optional_Chaining.md
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@ -97,7 +97,7 @@ class Person {
```swift ```swift
class Residence { class Residence {
var rooms = [Room]() var rooms: [Room] = []
var numberOfRooms: Int { var numberOfRooms: Int {
return rooms.count return rooms.count
} }