Rebol, programming is fun again!

1. R E B L Programming Is Fun Again

2. Who invented it? Carl Sassenrath, The REBOL Creator He worked for: And created Amiga:

3. Disadvantages On the rigid head, this language a bit awkward Totally different, and new. The core code is not open source Lack of good documentation Few users

4. Advantages

5. Do not need a bunch of files and configuration: just one file!

6. Rebol: 0,8 MB Super small size ...

7. Can do it

8. Simple and complex functions, audio and graphic ready to use

9. Dialogue Scripting Language DSL is currently the strongest language

10. Very suitable for development of disposable process

11. Or create quickly a prototype system

12. Across several major platforms

13. Incredible short code examples

14. View Layout [ Title "Hello" Btn "OK" [ Quit ] ] Windows programs areactually so short

15. print read http://www.rebol.com Download and print the contents of a web page

16. view layout [ u: field "user@rebol.com" h: field "http://" btn "Send" [ send to-email u/text read to-url h/text alert "Sent" ] ] Open window, read the web page and send it by email

17. foreach file load %./ [ if not dir? file [ write/binary join ftp://user:pass@example.com/ file read/binary file ] ] Upload all files via FTP

18. repeat n 100 [ if not error? try [ close open probe join tcp://localhost: n ] [ print [n "is open"] ] ] TCP port scan

19. page: remove-each tag load/markup http://www.rebol.com [ tag? Tag ] write %page.txt page Transform a web page in a simple text file (without tags!)

20. view layout [ origin 0 t: h1 red black (to string! now/time) rate 1 feel [ engage: [ t/text: now/time show t ] ] ] Digital clock

21. view l: layout [ origin 0x0 b: box "Load" [ error? try [ b/image: i: load first request-file b/text: "" l/size: b/size: i/size show l ] ] ] Picture viewer

23. To install, simple!

24. Do not rely on a bunch of files, simple!

25. Write code, simple!

26. Ported to other platforms, simple!

27. Maintain, simple! Keep IT Simple

28. When It Comes to Programming, Are You A REBEL ? [`rebl] Stand up for Simplicity and Flexibility , Against Software Complexity and Software Obesity , and Want to Program with Fun . Hay! You Got to Try Java !!!

29. R E B O L E L A T I V E X P R E S S I O N A S E D B J E C T A N G U A G E S T A N D S F O R E

30. As A Java Programmer, You Know Objects Already.

31. But Relative Expression?

33. Noun / tank

34. Verb / canned Rebol understands the meaning from the context, for example: Relative-Expression => Context-Sensitive Code

35. 3 Ways to Run REBOL Scripts Encapsulated Encapsulated Operating System REBOL Interpreter REBOL Script REBOL Interpreter REBOL Script REBOL interactive Interpreter REBOL Script

37. Drawing

38. Networking

39. Database Accessing

40. Web Browser Plug-In

41. External Lib Interface Small Yet Powerful All In One, One For All REBOL

42. Rebol Has Every Data Types You Can Imagine... datatype value Int! 1 Decimal! 3.1416 Char! #"A" Logic! True String! "ABC" >> ? 1 1 is an integer >> ? 3.1416 3.1416 is a decimal >> ? #"A" #"A" is a char >> ? True TRUE is a logic of value: true >> Type? "ABC" == string!

43. ...And Data Types You Can't Imagine datatypeURL value Email! [email_address] Percent! 32% Tag! <IMG> Date! 2009-7-21 Time! 18:00 File! %gdi32.dll Tuple! 127.0.0.1 URL! http://www.abc.com/ . . . More . . .

44. Java // Pseudo-Code // Include This and That // Declare This and That // ... Class MyApp { MyApp () { // … } void action() { System.quit(); } void layout() { Label title = new Label(&quot;Hello&quot;) Button btn = new Button(&quot;OK&quot;); btn.Click = action; Window win = new Window(); win.add(btn); win.add(btn); win.show(); } } Vs Rebol do the same of Java with only 5 lines of codes instead of hundreds!!! REBOL REBOL[] View Layout [ Title &quot;Hello&quot; Btn &quot;OK&quot; [ Quit ] ] The Magic Of Dialects

45. REBOL View is Easy and Fun!

48. REBOL/Services (SOA Lite) XML? Nah! Dialects are Better.

50. When to Use REBOL Spider Mobile Agent Instance Messenger Dialect Artificial Intelligence Text Processing