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浅谈作用域链查找机制。 #21

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@CodeRookie262

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@CodeRookie262

当我们要访问或者设置一个变量时,发现在当前作用域并未声明该变量却可以正常操作,有的时候却会报错,这些都和作用域链查找机制有关,作用域链是怎么回事呢,它又是如何进行查找的呢?

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