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hayden-pan avatar hayden-pan commented on July 3, 2024

是的，原题解释是有问题的，但是在这个项目里的另一个地方有同样的一道题，解释却是对的了。大概意思也是vscode智能提示里的错误，就是map索引读出是不可以获取到地址的。这里第一个回答解释了。这应该是golang故意设计的，因为如果暴露了值的地址，那么用户可以取这个值的地址进行传播，但是当map进行扩容的时候，值的存储地址就会被移动，那么原来的地址会失效。

但是有一点我却不是很理解，同样是在扩容的时候值的地址会变化的slice数据结构，为什么索引取值的时候却可以取地址？而不是和map一样的设计呢？当然如此这样设计，在编写代码的时候就显得很麻烦了

from interview-go.

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