javafunctional

Some functional interfaces seen in this repo are:

1. Consumer
2. Function
3. Predicate
4. Supplier

Combinator Pattern
"The functional pattern representing a style of organizing libraries centered around the idea of combining functions."

Callbacks, lambdas, optionals and streams complete the list of the subjects.

Functional programming leads to a more transparent, cleaner code that helps the user in debugging and maintenance,
and is fast becoming the go-to method for developers.