Take a look at the Interable interfae in Java if you want some good examples of reusable functions. It enables map, filter, stream, reduce, groupby, etc on lis

Take a look at the Interable interfae in Java if you want some good examples of reusable functions. It enables map, filter, stream, reduce, groupby, etc on lists, sets, etc or collections class which gives sort, min, max, replaceAll, etc