Functional Error Handling in Kotlin, Nullables and Options

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Functional Error Handling in Kotlin, Nullables and Options

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blog post: blog.rockthejvm.com/functiona...
Complete Kotlin course: rockthejvm.com/p/kotlin-essen...
This video is a guide to functional programming in Kotlin. We'll first see how the traditional way of dealing with errors in Kotlin is not "functional" from the point of view of referential transparency, with a focus on absent values.
Then we'll explore a few tools in Kotlin and Arrow that will help us deal with the possible absence of values (and subsequent errors this causes) in a functional way using nullables, scoped functions, options and more.
The next video will show you how you can also manage the cause of the errors you see in applications, in a functional way.
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Пікірлер: 11

@dmytrooleinichenko9865 Жыл бұрын

Great video! Would be cool to see your video about Arrow effects

@CffYT 8 ай бұрын

Minor bug in your video and the article is the use of maxBy when finding the highest salary. Because your DB has values in it it won't be a problem but in the case of an empty DB it would throw an exception. maxByOrNull would prevent that. No biggie but given it's a demo about exception handling thought I'd raise it :)

@rockthejvm 8 ай бұрын

Received!

@leorandomnickname Жыл бұрын

I think that in the example JobsService2 since you moved the findJobs call to the try block , so you are comparing two different programs, so you cannot say that is a valid example of referencial transparency violation. If you keep the line in the same position, and replace the findJobs call with the throw statement, the behavior is the same in both cases. But I get the point.

@alekseiandrosov1099 Жыл бұрын

Rip scala

@rockthejvm Жыл бұрын

@dmytrooleinichenko9865 Жыл бұрын

Kotlin is awesome, but Scala has a lot more features

@terrormapu Жыл бұрын

While Kotlin is no Scala..it does push Scala into a even more niche language

@levinie5081 Жыл бұрын

I write kotlin for work every day, but the more I consider my code, the more I am thirsty for Scala 3. Kotlin's type system and ability of abstraction is way weaker than Scala 3.

@qbyteconsulting5729 Жыл бұрын

Kotlin + Arrow does a great job - so maybe RIP Java. However, Scalas pattern matching is powerful and its syntactic cleanness make it ideal for DSLs (things you just can't do in Kotlin) and then there is the wonderful for comprehension. Arrow is a little minimalist, or at least when I used it, so it doesn't quite compare to CATS or ZIO for example.