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编辑13题代码里一个小错误
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01《招聘一个靠谱的iOS》面试题参考答案/《招聘一个靠谱的iOS》面试题参考答案(上).md

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@@ -1135,7 +1135,7 @@ stringCopy的值也不会因此改变,但是如果不使用copy,stringCopy
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集合类对象是指NSArray、NSDictionary、NSSet ... 之类的对象。下面先看集合类immutable对象使用copy和mutableCopy的一个例子:
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```Objective-C
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NSArray *array = @[@[@"a", @"b"], @[@"c", @"d"];
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NSArray *array = @[@[@"a", @"b"], @[@"c", @"d"]];
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NSArray *copyArray = [array copy];
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NSMutableArray *mCopyArray = [array mutableCopy];
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```

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