更新字符串和字符部分代码
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@ -114,7 +114,7 @@ Swift 默认字符串拷贝的方式保证了在函数/方法中传递的是字
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您可通过`for-in`循环来遍历字符串中的`characters`属性来获取每一个字符的值:
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您可通过`for-in`循环来遍历字符串中的`characters`属性来获取每一个字符的值:
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```swift
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```swift
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for character in "Dog!🐶" {
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for character in "Dog!🐶".characters {
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print(character)
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print(character)
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}
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}
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// D
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// D
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