Content of the subdirectory article_28

1. Stream constructor
2. Conversion to stream
3. Conversion of slice of user structures to stream
4. Array conversion to stream
5. Array conversion to stream
6. Basic stream attributes
7. Contains method
8. IndexOf and LastIndexOf methods
9. Contains method for user struct stream
10. IndexOf and LastIndexOf methods for user struct stream
11. Take method
12. Add and Drop methods
13. Filtering of stream
14. Lambda variant of example #13
15. Map method and streams
16. Lambda variant of example #14
17. ForEach method and streams
18. Sort method and streams
19. Lambda variant of example #16
20. Reverse method and streams
21. Combination of more stream manipulators
22. Improper combination of more stream manipulators
23. Reduce method
24. Lambda variant of example #20
25. Max value computed using Reduce