Rebol hat strikt überprüfte Datentypen und erlaubt einfache Definition einer eigenen DSL. Daher kennt es viele Kontexte und ist unglaublich ausdrucksstark. Rebolprogramme können so kurz werden, daß selbst Perl etwas davon lernen kann.

1. Was kann Perl von Rebol lernen?

2. Kein Rebol Lehrgang

3. etwas Hobbyphilosophie

4. Perl Philosophie
TIMTOWTDI
simple and possible
context sensitive

5. Philosophie
TIMTOWTDI
simple and possible
context sensitive

6. Zitat
Take a dash of PERL, mix with the cross
platform compatibilty of a Java, and make it
extremely easy for beginners to start coding, and
you get the general idea.

7. A Hobby Philosopher

8. „Real“ Philosopher

9. Carl Sassenrath

10. Carl Sassenrath
- Apple, HP and Commodore

11. Carl Sassenrath
- Apple, HP and Commodore
- Pantaray, American Multimedia, Videostream

12. Carl Sassenrath
- Apple, HP and Commodore
- Pantaray, American Multimedia, Videostream
- REBOL Technologies

13. Carl Sassenrath
- Amiga OS, IOS, VisCorp ED
- CDTV
- Amiga Logo, Next Gen. Forth, Rebol

14. - Distribution

15. - Browser

16. Left Click : Start Rebol App

17. Left Click : Start Rebol App

18. Rebol App

19. Rebol App

20. Rebol App

21. Rebol App

22. - Browser

23. Right Click : Get Meta Data

24. Rebol Editor

25. - Browser

26. Rebol Shell

27. Carl Sassenrath
- Amiga OS, IOS, VisCorp ED
- CDTV
- Amiga Logo, Next Gen. Forth, Rebol

28. Carl Sassenrath
- Amiga OS, IOS, VisCorp ED
- CDTV
- Amiga Logo, Next Gen. Forth, Rebol

30. ● Lisp, Forth, Logo and Self

31. ● Lisp, Forth, Logo and Self
● Lightweight Distributed Computing

32. ● Lisp, Forth, Logo and Self
● Lightweight Distributed Computing
● programming-in-the-small (PITS)

33. PITS:
~ 800kB Interpreter
1.8 MB für die Distribution
Libs
Tools
Samples
Docs
Links

34. PITS:
Remote Editor: 53
Daytime Server Deamon: 61
bmp2png Konverter
TCP Port Scanner: 98
einfache Uhr App: 106
minimaler Email Client: 130
einfacher Bildbetrachter: 132

35. PITS:
Remote Editor: 53
Daytime Server Deamon: 61
bmp2png Converter
TCP Port Scanner: 98
Simple Clock App: 106
Minimal Email Client: 130
Simple Picture Viewer: 132

36. PITS:
view layout [
f: field btn"Edit"[editor to-url f/text]
]

37. ● Lisp, Forth, Logo and Self
● Lightweight Distributed Computing
● programming-in-the-small (PITS)

38. ● Lisp, Forth, Logo and Self
● Lightweight Distributed Computing
● fighting software complexety

39. ● Lisp, Forth, Logo and Self
● Lightweight Distributed Computing
● fighting software complexety

41. Silent Scream: Rebel with a cause

42. Relative Expression-Based Object Language

43. Relative Expression-Based Object Language
eval that like REBOL does:
back to front

44. Relative Expression-Based Object Language
the obvious, don't argue with that

45. Relative Expression-Based Object Language
sounds like OOP ?

46. Relative Expression-Based Object Language
● no OOP like Ruby or Perl 6

47. Relative Expression-Based Object Language
● no OOP like Ruby or Perl 6
● Object means here just „thing“

48. Relative Expression-Based Object Language
That brings no meaning anyway :)
There are same principles it's based on

49. Relative Expression-Based Object Language
Sounds like a functional language ?

50. Relative Expression-Based Object Language
(not pure) functional (since 2.0)

51. Relative Expression-Based Object Language

52. Relative Expression-Based Object Language
● Thats's the main message

53. Relative Expression-Based Object Language
● Thats's the main message
● That's how Rebol syntax works

54. Relative Expression-Based Object Language
● Thats's the main message
● That's how Rebol syntax works
● In Perl we call that context sensitive

55. Relative Expression-Based Object Language
read http://www.perl.org/learn.html
read %info.txt

56. Rebol Perl 5
read http://www.perl.org/learn.html
use LWP::Simple;
get("http://www.perl.org/learn.html");
text: read %info.txt
use File::Slurp;
my $text = slurp( 'info.txt' ) ;

57. Rebol Perl 6
read http://www.perl.org/learn.html
use HTTP::Client;
HTTP::Client.new.get("http://www.perl.org/learn.html");
text: read %info.txt
my $text = slurp( 'info.txt' ) ;

58. Rebol
messages: read
nntp://news.server.dom/comp.lang.rebol

59. Rebol
messages: read
nntp://news.server.dom/comp.lang.rebol
image: read/binary http://www.page.dom/image.jpg
write/binary %image.jpg image

60. welcome to the strange land

61. shock therapy

62. , vergiss was du weißt
keine Variablen
keine Hashes
Keine Vorrangtabelle (2 + 3 * 2 == 10)
keine Builtins
keine Subroutinen
manchmal lexikalische räume
keine Namensräume (vor Rebol 3)
keine Regex (parse)

63. Alles weg?

64. 4 Begriffe müsst ihr verstehen

65. 4 Begriffe
worte:
data types:
series:
refinements:

66. 4 Begriffe
worte: typenloser Datenkontainer
data types:
series:
refinements:

67. 4 Begriffe
worte: Variablen, Routinen, Builtins
data types:
series:
refinements:

68. 4 Begriffe
worte: Variablen, Routinen, Builtins
data types: integer, string, char, tuple, pair, block,
series:
refinements:

69. 4 Begriffe
worte: Variablen, Routinen, Builtins
data types: integer, string, char, tuple, pair, block,
money, file, url, email, tag, binary, date, time, issue
series:
refinements:

70. 4 Begriffe
worte: Variablen, Routinen, Builtins
data types: integer, string, char, tuple, pair, block,
money, file, url, email, tag, binary, date, time, issue
series:
refinements:

71. 4 Begriffe
worte: Variablen, Routinen, Builtins
data types: integer, string, char, tuple, pair, block,
money, file, url, email, tag, binary, date, time, issue
serien: Listen, Hashes, Codeblöcke
refinements:

72. 4 Begriffe
worte: Variablen, Routinen, Builtins
data types: integer, string, char, tuple, pair, block,
money, file, url, email, tag, binary, date, time, issue
series: Listen, Hashes, Codeblöcke
refinements: (@ / %) slices / return value

73. Perl Rebol
# => ;
{} => []
$var = => var:
$var => :var
eval $var => var
$var[3] => var/3
$var{'sub'} => var/sub
sub() => sub
sub($p,$m) => sub p m

74. Perl Rebol
print => print
say => prin
$var = => var:

75. Perl Rebol
$a++ a: a + 1

76. Perl Rebol
$a = 30 * 3.1415 / 180
sin($a) / cos($a) tangent 30
sin($a) / cos($a) tangent/radians 30
use Math::Trig;
tan(deg2rad(30));

77. Perl 6 Rebol
loop => forever
all, any none @a => all, any []
prompt => ask
slurp => read
kein break in switch
Pair als nativer Typ
grammars, viel MMD

78. Meta Data
REBOL [
Title:
Date:
Version:
...
]

79. Meta Data
File: Author: Email: Web: Rights: Requires:
Purpose: { }, Comment: { }, Notes: { }
History: [0.1.1 12-Oct-2008 "add to ... path"
Library: [ ...

80. DSL for GUI
view layout [
text :rise_time
button "Quit" #"q" [quit]
]

81. in Perl
use Tkx;
Tkx::button(".b",
-text => "Hello, world",
-command => sub { Tkx::destroy(".") },
);
Tkx::pack(".b");
Tkx::MainLoop();

82. in Perl
use Prima qw(Application Button);
New Prima::MainWindow(
text => "Hello, world",
size => [ 200, 200] ,
)-> insert( Button =>
centered => 1,
text => "Hello, world",
onClick => sub { $::application->close } ,
);
run Prima;

83. RebGUI
view layout [
text :rise_time
button "Quit" #"q" [quit]
]

84. DSL for Regex
expr: [term ["+" | "-"] expr | term]
term: [factor ["*" | "/"] term | factor]
factor: [primary "**" factor | primary]
primary: [some digit | "(" expr ")"]
digit: charset "0123456789"
probe parse "1 + 2 * ( 3 - 2 ) / 4" expr
== true

85. DSL for Regex
parse read
http://www.gaisma.com/en/location/halle.html
[
thru <td class="sunshine"><i>
copy rise_time
to </i>
]

86. funktionale DSL
does
func
function

87. DSL für OOP
make

88. Rebol 3
Open Source
Unicode
Debug Hooks
bessere GUI Objekte

89. Ideen
Io::All
Contextual::Return
Prima

90. Ideen
Perlapi
Module
Distributionen