Scala:在Java、c#、Scala和c++中有更高的kinded、open-type和通配符泛型

I'd been programming in C#, but was frustrated by the limitations of its type system. One of the first things, I learned about Scala was that Scala has higher kinded generics. But even after I'd looked at a number of articles, blog entries and questions I still wasn't sure what higher kinded generics were. Anyway I'd written some Scala code which compiled fine, I'd been programming in C#, but was frustrated