This page contains a large collection of examples of how to use the Scala ArrayBuffer class.
Use the ArrayBuffer class when you want to use a general-purpose, mutable indexed sequence in your Scala applications:
This page is a work in progress, but if you need to create a secondary class constructor in Kotlin, I hope it’s helpful.
This page contains a large collection of examples of how to use the methods on the Scala List class.
The Scala List class as an immutable, linear, linked-list class. It’s very efficient when it makes sense for your algorithms to (a) prepend all new elements, (b) work with it in terms of its head and tail elements, and (c) use functional methods that traverse the list from beginning to end, such as filter, map, foldLeft, reduceLeft.
This page contains a large collection of examples of how to use the methods on the Scala Seq class.
As an important note, I use Seq in the following examples to keep things simple, but in your code you should be more precise and use IndexedSeq or LinearSeq where appropriate. As the Seq class Scaladoc states:
As a brief note today, if you want to see how to create a Scala case class that defines multiple alternate constructors, I hope this example is helpful:
Scala FAQ: How do I created a Scala Date from a Long value? When I give the Java Date class constructor a Long value it returns a date from 1970.
Solution: You need to multiply the Long value by 1000, and also make sure you pass a Long value into the Date constructor. The Scala REPL shows how this works:
Here are a few notes about using Scala traits as mixins, specifically:
- The order in which mixed-in traits are constructed
- The order in which overridden methods in traits are called when multiple traits are mixed in
