https://github.com/in28minutes/functional-programming-with-java/blob/master/code.md Topics

1. method reference System.out::println

2. stream

3. filter

4. map

5. foreach

6. reduce reduce(0,(x,y)->x+y) 0 is initial val, 2nd param is bi function

7. distinct

8. sorted sort in reverse order by length sorted(Comparator.naturalOrder()) sorted(Comparator.reverseOrder()) sorted(Comparator.comparing(str->str.length()))

   courses.stream().sorted((x,y)->y.length()-x.length()).forEach(System.out::println)

9. collect .collect(Collectors.toList());

10. Intermediate operation--steam, map, filter,sorted, distinct

11. Terminal operation -- forEach,reduce

12. collect--specific return type

13. Functional Interface------>

14. Function<T,R>; Predicate; Consumer<T,R>

15. Behaviour Parameterization

16. BinaryOperator--operator: all the params are of the same types, two inputs
    and one out put

17. Supplier-- no input / but returns

18. UnaryOperator

19. BiPredicate

20. Biunction

21. BiConsumer

22. allmatch, nonematch, anymatch

23. Comparator

24. limit, skip,

25. takewhile---if one element breaks the criteria we will not consider anything after this

26. dropwhile--as long as condition is true we will skip the elements , when we get any element which does not meet the requirement we will consider all the elements including this

27. top, max, min, findFirst, findAny

28. Collect--Collectors--grouping by , maxBy, mapping

29. Stream.of(), Arrays.stream(new int[] {1,2,3})--stream with primitive value

30. IntStream.iterate, IntStream.range()

31. BigInteger

32. flatMap

33. HigherOrder function

34. peek()

35. intermediate operations are lazy--executed on the basis of terminal operation-- execute the work only what is needed

36. Parallel stream

37. removeIf --replaceAll

38. File operations