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mod: 11.9.md (#749)

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Xavier Zhao
2020-01-21 23:29:43 +08:00
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@@ -246,7 +246,7 @@ func f3(x myInterface) {
}
```
`x` 转换为 `myPrintInterface` 类型是完全动态的：只要 `x` 的底层类型（动态类型）定义了 `print` 方法这个调用就可以正常运行。
`x` 转换为 `myPrintInterface` 类型是完全动态的：只要 `x` 的底层类型（动态类型）定义了 `print` 方法这个调用就可以正常运行（译注：若 `x` 的底层类型未定义 `print` 方法，此处类型断言会导致 `panic`，最佳实践应该为 `if mpi, ok := x.(myPrintInterface); ok { mpi.print() }`，参考 11.3 章节）。
## 链接