Who's More Functional: Kotlin, Groovy, Scala, or Java?

What is "functional programming" (FP)? Is it a paradigm, a mind-set, or just a buzzword? What's good about it? How can we benefit from it? This session is about functional aspects of modern programming languages and their costs and benefits. As the mainstream languages rely on object orientation, the session presents "functional style" as a set of design patterns that have been well known in the object-oriented (OO) community for the last two decades but that sometimes appear as a revelation to the FP community.


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[АлександрС-шь]

Among JVM-languages - Scala is a winner. Concerning Kotlin, I asked in their official groups to explain which features Kotlin support that Scala does not, or which features are supported both in Scala and Kotlin, but in a different way (I am not talking about syntax now), they promised to prepare and answer. Still no feedback, it was several years ago. Java language itself will never become functional. And explain to Java developers - which problems OOP has if to use it incorrectly and how FP solves them, it is really hard. (I am Java developer)

[michaelpanciera]

There is a lot of misleading information in this talk.

[EmilNicolaiePerhinschi]

Perl 5 is more functional than all of them ;)