Therefore, in this paper, we will talk about an educational approach to teaching an important data structure, aiming to reduce the friction between learning a new computing concept and a new programming language.

Language issues (because that language is new, sometimes).

We can highlight at least two issues about a programming language and data structure: Thus, the programming language can often be a hurdle in this process. It is common for students to have difficulties comprehending the data structure fundamentals as they need to understand the data structure’s purpose, besides having a piece of solid algorithm knowledge. Use this only if you really want, for example, a LinkedList implementation.Linked Lists in Kotlin: An educational approach (1)ĭata structures are a challenge, for both teachers and students. That is simply create the object by calling its constructor.

For other List implementations, which have not got any convenience functions, they can be initialized as, for example, val list = LinkedList().

In case you really want an ArrayList implementation, use this over mutableListOf().

Greg T gives the alternative, arrayListOf().

gmariotti suggests using mutableListOf(), which typically is what you want when you need to add or remove elements from the list.

Mutable lists can have elements added or removed.

listOfNotNull() returns an immutable list excluding all null elements.

As frogcoder states in a comment, emptyList() does the same, but naturally returns an empty list.

This creates an immutable list, similar to Arrays.asList in Java.

As Ilya points out, listOf() often does what you want.Immutable, or read-only lists, are lists which cannot have elements added or removed. This answer includes a summary of the already given ones, along with clarifications and a couple of other alternatives.

Some alternatives are however spread out in comments, and some are not mentioned at all. Both the upvoted answers by Ilya and gmariotti are good and correct.

Kotlin linked list