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关于13.1节的疑问 about goexpertprogramming HOT 5 OPEN

mfzzz avatar mfzzz commented on August 22, 2024
关于13.1节的疑问

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RainbowMango avatar RainbowMango commented on August 22, 2024

抱歉还没来得及看,为什么又关掉了?

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RainbowMango avatar RainbowMango commented on August 22, 2024

那13.1节的扩容分析感觉不是问题所在,即使不扩容,只要不接收返回返回值,原来的slice也不会变化。

如果append时没有发生扩容,原来的slice也是变化的(元素增多了)。

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mfzzz avatar mfzzz commented on August 22, 2024

嗯,如果append没有使slice扩容,slice指向的底层数组是同一个,且里面元素发生变化。但是append是值传递,对于原slice来说,如果不接收返回值,它的len不会改变,所以底层数组的变化不会体现到它上面。所以我感觉问题不在于是否发生扩容。(这种情况 slice没有扩容,错误信息也是不会返回)。(不知道我理解的是否有偏差)

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RainbowMango avatar RainbowMango commented on August 22, 2024

是的,我也是这么理解的。

所以,你觉得13.1节需要改,还是13.3节需要改。建议如何改?

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mfzzz avatar mfzzz commented on August 22, 2024

原文“append()函数每次追加元素都有可能触发切片扩容,即有可能返回一个新的切片”,这里的“即有可能”是不是可以去掉呀,我理解的是每次都会返回新切片(即使共享底层数组的情况也算一个新切片吧?)。我觉得13.1的例子可以合并到13.3中😂。

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