August 2018
Intermediate to advanced
380 pages
10h 2m
English
Content preview from Mastering Functional Programming
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Traits
The concept of an object-oriented interface is encapsulated in a trait in Scala. Similarly to an interface, a trait can have abstract members. However, unlike Java interfaces, traits may also have concrete members. These are injected into the implementing classes:
scala> :paste// Entering paste mode (ctrl-D to finish)trait Foo { def saySomething = println("I am inherited from Foo")}// Exiting paste mode, now interpreting.defined trait Foo
Just like in Java, Scala classes can implement more than one trait. However, since traits in Scala can have concrete members, a new inheritance model that allows for that is required.
In Scala, a so-called linearization model is implemented. This means that whenever a class is inherited from ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.