What we can learn from Rebol?
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The document discusses the comparisons between Perl and Rebol, especially focusing on context sensitivity and programming paradigms. It highlights how Rebol's design prioritizes simplicity for beginners while contrasting it with Perl's capabilities and libraries. Furthermore, it explores concepts such as type handling, data structures, and syntax peculiarities of both languages.
![PITS:
view layout [
f: field btn"Edit"[editor to-url f/text]
]](https://image.slidesharecdn.com/learningrebol-100816132949-phpapp02/85/What-we-can-learn-from-Rebol-36-320.jpg)
![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](https://image.slidesharecdn.com/learningrebol-100816132949-phpapp02/85/What-we-can-learn-from-Rebol-71-320.jpg)
![Perl 6 Rebol
loop => forever
all, any none @a => all, any []
prompt => ask
slurp => read
no break in switch
Pair als nativer Typ
grammars, heavy usage of MMD](https://image.slidesharecdn.com/learningrebol-100816132949-phpapp02/85/What-we-can-learn-from-Rebol-74-320.jpg)
![Meta Data
REBOL [
Title:
Date:
Version:
...
]](https://image.slidesharecdn.com/learningrebol-100816132949-phpapp02/85/What-we-can-learn-from-Rebol-75-320.jpg)
![DSL for GUI
view layout [
text :rise_time
button "Quit" #"q" [quit]
]](https://image.slidesharecdn.com/learningrebol-100816132949-phpapp02/85/What-we-can-learn-from-Rebol-77-320.jpg)
![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;](https://image.slidesharecdn.com/learningrebol-100816132949-phpapp02/85/What-we-can-learn-from-Rebol-79-320.jpg)
![RebGUI
view layout [
text :rise_time
button "Quit" #"q" [quit]
]](https://image.slidesharecdn.com/learningrebol-100816132949-phpapp02/85/What-we-can-learn-from-Rebol-80-320.jpg)
![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](https://image.slidesharecdn.com/learningrebol-100816132949-phpapp02/85/What-we-can-learn-from-Rebol-81-320.jpg)
![DSL for Regex
parse read
http://www.gaisma.com/en/location/halle.html
[
thru <td class="sunshine"><i>
copy rise_time
to </i>
]](https://image.slidesharecdn.com/learningrebol-100816132949-phpapp02/85/What-we-can-learn-from-Rebol-82-320.jpg)
What we can learn from Rebol?
- 1. What can Perl learn from Rebol ?
- 4. Perl Philosophy TIMTOWTDI simple and possible context sensitive
- 5. Philosophy TIMTOWTDI simple and possible context sensitive
- 6. Quote 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.
- 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 binary 1.8 MB for distribution Libs Tools Samples Docs Links
- 34. 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
- 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. welcome to the strange land
- 59. shock therapy
- 60. , forget all you know no variables no hashes no precedence table (2 + 3 * 2 == 10) no builtins no Subroutinen sometimes scopes no name spaces (befor Rebol 3) no Regex (parse)
- 61. All is gone?
- 62. You have to know 4 concepts
- 63. 4 Terms words: data types: series: refinements:
- 64. 4 Terms words: typeless data container data types: series: refinements:
- 65. 4 Terms words: variables, routines, buildins data types: series: refinements:
- 66. 4 Terms words: variables, routines, buildins data types: integer, string, char, tuple, pair, block, series: refinements:
- 67. 4 Terms words: variables, routines, buildins data types: integer, string, char, tuple, pair, block, money, file, url, email, tag, binary, date, time, issue series: refinements:
- 68. 4 Terms words: variables, routines, buildins data types: integer, string, char, tuple, pair, block, money, file, url, email, tag, binary, date, time, issue series: refinements:
- 69. 4 Terms words: variables, routines, buildins data types: integer, string, char, tuple, pair, block, money, file, url, email, tag, binary, date, time, issue series: lists, hashes, code refinements:
- 70. 4 Terms words: variables, routines, buildins data types: integer, string, char, tuple, pair, block, money, file, url, email, tag, binary, date, time, issue series: lists, hashes, code refinements: (@ / %) slices / return value
- 71. 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
- 72. Perl Rebol $a++ a: a + 1
- 73. 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));
- 74. Perl 6 Rebol loop => forever all, any none @a => all, any [] prompt => ask slurp => read no break in switch Pair als nativer Typ grammars, heavy usage of MMD
- 75. Meta Data REBOL [ Title: Date: Version: ... ]
- 76. Meta Data File: Author: Email: Web: Rights: Requires: Purpose: { }, Comment: { }, Notes: { } History: [0.1.1 12-Oct-2008 "add to ... path" Library: [ ...
- 77. DSL for GUI view layout [ text :rise_time button "Quit" #"q" [quit] ]
- 78. in Perl use Tkx; Tkx::button(".b", -text => "Hello, world", -command => sub { Tkx::destroy(".") }, ); Tkx::pack(".b"); Tkx::MainLoop();
- 79. 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;
- 80. RebGUI view layout [ text :rise_time button "Quit" #"q" [quit] ]
- 81. 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
- 82. DSL for Regex parse read http://www.gaisma.com/en/location/halle.html [ thru <td class="sunshine"><i> copy rise_time to </i> ]
- 83. Functional DSL does func function
- 84. DSL for OOP make
- 85. Rebol 3 Open Source Unicode Debug Hooks Better GUI Objects