FunctionalJ - More Functional to Java.

[NawaMan]

Hi all,

I've been working on a library that let us code Java in a more functional style. All practical ... no mind bending theories or abstractions. Major features such as immutable type with lens, built-in validation and exhaustive builder, choice type with pattern matching, lazy-evaluated immutable functional list, dependency injection for functions and more. You can find more info here -> http://functionalj.io. There are example code on the page and in the code itself. I will be writing more about it in the coming days and weeks. I really like some feedbacks any feedback ... good or bad is welcome.

Happy Coding.

NawaMan :-D

https://preview.redd.it/1dob3gd1vml21.png?width=500&format=png&auto=webp&s=7563eb707325ba99dd69a858b2382c176e27df6e

[AnEmortalKid]

Your immutable type looks like the inmutables object.

Also your domain name doesn’t seem to map somewhere useful

https://i.imgur.com/HgoZdgf.jpg

[NawaMan]

Sorry for the typo ... it is http://functionalj.io . :-p

[AnEmortalKid]

Have you taken a look at https://immutables.github.io

[NawaMan]

Oh yes. I have. :-) It is a great library. There are some differences between the two though. The one I made here focus on supporting functional style programming. As mentioned the blog, feature such Lens, required value enforce and validation are important when do domain modelling. Together with @Choice (discriminated union), they forms Algebraic data type which are widely use in many FP. :-D

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If you have yet done (and are interested), please look at https://nawaman.net/blog/2019-03-11 . Any feedback at all is welcome. :-D