1. Brainwasher
Jerry Tsai / 蔡学镛 ( 孔宣 )
Alipay.com Co. Ltd’
KongXuan@Alipay.com

2. “Hello“ Made Easy in REBOL!
REBOL[]
View Layout [
Title "Hello"
BTN "OK" [
Quit
]
]

3. Keep IT
Simple
REBOL is Simple!
1. Downloading & Upgrading
2. Installation
3. All In One, One For All
4. Coding
4. Porting to Other Platforms
5. Maintenance

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

5. 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

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

7. But Relative Expression?

8. can
• auxiliary
• tin
• noun
• pot
Relative-Expression
=>
Context-Sensitive Code

9. Carl Sassenrath,
The REBOL Creator

10. 3 Ways to Run REBOL Scripts
Operating System
REBOL
Interpreter
REBOL
Script
REBOL
Interpreter
REBOL
Script
REBOL
interactive
Interpreter
REBOL
Script

11. Portable Scripts
Operating System
REBOL Interpreter
REBOL Script
Operating System
REBOL Interpreter

12. REBOL Supports Major
Operating Systems
Including…
And
It’s Designed
for Easily Porting
to More Platforms …

13. REBOL – Tiny Footprint
Small Footprint
Runtime 10x less
than Java
Script Size 10x less
than Java

14. 15.1
~23 MB197 MB
10.3
10.7
14.9
11
50 MB 100 MB10 MB
2x
< 1
Size Does Matter, 2008 Edition
Adobe
AIR

15. Windowing
Drawing
Networking
Database Accessing
Web Browser Plug-In
External Lib Interface
Small Yet
Powerful
All In One, One For All
REBOL

16. 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!

17. Data Types You Cannot Imagine
datatypeURL value
Email! jerry@abc.com
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 . . .

18. Any-TypeSeries
Scalar
Number
Any-Word
Any-String
Any-FunctionAny-Block
REBOL Data Types (& Type Sets)
Char!

19. // Pseudo-Code
// Include This and That
// Declare This and That
// ...
Class MyApp {
MyApp () {
// …
}
void action() {
System.quit();
}
void layout() {
Label title = new Label("Hello")
Button btn = new Button("OK");
btn.Click = action;
Window win = new Window();
win.add(btn);
win.add(btn);
win.show();
}
}
REBOL[]
View Layout [
Title "Hello"
Btn "OK" [
Quit
]
]
The Magic
Of Dialects

20. Maintain
Writeable
Succinct
Literals Dialecting
Parsing
Abstraction
Bug-Free
Readable
GUI
Finance
Database
. . .
Mojo of REBO
Functions

21. REBOL View
is Easy and Fun!

22. Take a Break
For 10 Mins
Z .. Z .. Z ....

23. • Extends REBOL
• Are DLLs
• Can Be in C or REBOL
• Only in REBOL 3.0
REBOL Plug-ins

24. REBOL in Web Server
• CGI (Common Gateway Interface)
• Fast-CGI
• Cheyenne Web Server (300 KB Only)
• REBOL Server Pages (RSP)

25. REBOL 3.0 Supports
Unicode• String is in Unicode.
• Both In Core and In View
• Will Support Multi CharSets

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

27. REBOL/Code
• Talk to REBOL VM Directly
• With Great Performance
• REBOL Dialecting Technology

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

29. REBOL is COOL, REBOL is
GREAT, REBOL is
WONDERFUL, REBOL is ONE
of A KIND, REBOL is What I
Want …

30. Join Us
And
Do Something
REBOL User Group @ China
AliTalk Group: No. 16626148
Host: Jerry Tsai (KongXuan)
REBOL Docs Trans Program
(http://sites.google.com/site/cnrebol/)
Host: CaiMinKui
Rebology Blog
(http://rebollovesjerry.blogspot.com)
Host: Jerry Tsai

31. REBOL Baby-Step Examples

32. Q1: Print web page source
print read http://www.rebol.com

33. Q2: Open a GUI, read web page, sent
it as email
view layout [
u: field "user@rebol.com"
h: field "http://"
btn "Send" [
send to-email u/text
read to-url h/text
alert "Sent“
]
]

34. Q3: FTP upload all files
foreach file load %./ [
if not dir? file [
write/binary join
ftp://user:pass@example.com/ file
read/binary file
]
]

35. Q4: TCP port scanner
repeat n 100 [
if not error? try [
close open probe join tcp://localhost: n
] [
print [n "is open"]
]
]

36. Q5: Save web page text to a file
remove-each tag page:
load/markup http://www.rebol.com
[ tag? Tag ]
write %page.txt page

37. Q6: Digital Clock
view layout [
origin 0
t: h1 red black (to string! now/time)
rate 1
feel [
engage: [
t/text: now/time
show t
]
]
]

38. Q7: Picture Viewer
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
]
]
]

40. Thank You