Something else to note is that the Scala compiler doing its type inference does the right thing for the type of the "method" object returned by the if/else.

还需注意，对于 if/else 返回的 “method” 对象的类型，Scala 编译器会进行 does the right thing 类型推断。

youdao

Mode means method, or the way of doing something.

方式就是办法，或者说办事的方法。

youdao

And in the early years of a new method of doing something it can be helpful to mimic the forms of the previous ways of performing that function.

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