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update Control Flow

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nemodzchen
2019-06-26 19:16:32 +08:00
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source/chapter2/05_Control_Flow.md
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@ -30,9 +30,9 @@ let numberOfLegs = ["spider": 8, "ant": 6, "cat": 4]
for (animalName, legCount) in numberOfLegs { for (animalName, legCount) in numberOfLegs {
print("\(animalName)s have \(legCount) legs") print("\(animalName)s have \(legCount) legs")
} }
// cats have 4 legs
// ants have 6 legs // ants have 6 legs
// spiders have 8 legs // spiders have 8 legs
// cats have 4 legs
``` ```
字典的内容理论上是无序的，遍历元素时的顺序是无法确定的。将元素插入字典的顺序并不会决定它们被遍历的顺序。关于数组和字典的细节，参见[集合类型](./04_Collection_Types.md)。 字典的内容理论上是无序的，遍历元素时的顺序是无法确定的。将元素插入字典的顺序并不会决定它们被遍历的顺序。关于数组和字典的细节，参见[集合类型](./04_Collection_Types.md)。