我们将探讨的第一个关于空指针异常的错误类型，是一个我称之为悬挂复合类型的错误类型。
The first bug pattern relating to null-pointer exceptions that we'll explore is one that I call the Dangling Composite pattern.
我们将探讨的第一个关于空指针异常的错误类型，是一个我称之为悬挂复合类型的错误类型。
The first bug pattern relating to null-pointer exceptions that we'll explore is one that I call the Dangling Composite pattern.
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