"Spark Asia-Pacific Research series" Spark Combat Master Road-2nd Chapter hands-on Scala 3rd bar (2)

3, hands-on generics in Scala

generic generic classes and generic methods, that is, when we instantiate a class or invoke a method, you can specify its type, because Scala generics and Java generics are consistent and are not mentioned here.

4, hands on. Implicit conversions, implicit parameters, implicit classes in Scala

Implicit conversion is one of the key points that many people learn about Scala, which is the essence of Scala:

Let's take a look at the example of hidden parameters:

The above example uses implicit parameters, of course, you can display the specified parameters:

Here's an implicit class:

"Spark Asia-Pacific Research series" Spark Combat Master Road-2nd Chapter hands-on Scala 3rd bar (2)