The document discusses several programming languages including Ioke, a dynamic and strongly typed language inspired by Io, Smalltalk, Self and Lisp that runs on the JVM. It provides examples of how to write a simple Rock Paper Scissors game in Ioke and Ruby. It also briefly mentions the potential for languages to run on the JVM, CLR and Parrot virtual machines in the future.

1. Tomorrow’s Programming
Languages Today
Joshua Wehner, Unspace
@jaw6, joshua@unspace.ca

2. A story
‣ About a year ago...
‣ Working in Amsterdam
‣ Innovation Factory
‣ Sam Aaron
(@samaaron)

3. All About Ioke
‣ Sounds like Eye-Oh-Key
‣ Ola Bini: JRuby Core,
ThoughtWorks
‣ Dynamic, strongly typed
‣ Hosted on the JVM
‣ Inspired by Io, Smalltalk,
Self, Lisp
‣ Prototype-based,
http://github.com/olabini/ioke/
homoiconic
http://olabini.com/blog/

4. Can your language do this?
RPS = Origin mimic do(
Player = Origin mimic
Field = Origin mimic
Field pass = macro(
RPS Player with(name: call message name asText, field: self))
scores = {} withDefault(0)
Player throws = macro(
field plays << (self name => call message next name)
call message -> call message next next
)
win = method(p,
scores[p key] += 1
"#{p key} wins" println)
draw = method("Draw" println)
play = macro(
field = Field with(plays: [])
call arguments[0] evaluateOn(field)
p1 = field plays[0]
p2 = field plays[1]
case([p1 value, p2 value],

5. Rock Paper Scissors.ik
RPS play(
Carlos throws paper
Ola throws rock
)
RPS play(
Carlos throws scissors
Ola throws rock
)
RPS play(
Carlos throws scissors
Ola throws scissors
)

6. Rock Paper Scissors.rb
RPS.play {
Sam throws paper
Ola shoots rock
}
RPS.play {
Sam throws paper
Ola shoots scissors
}
RPS.play {
Sam throws rock
Ola shoots rock
}

7. Rock Paper Scissors.rb
def method_missing(method_name, object=nil)
if [:paper, :rock, :scissors].include? method_name
method_name.to_s
RPS.play { elsif RPS.playing_with?(method_name)
Sam throws paper RPS.play_as(Player.new(:name => method_name.to_s))
Ola shoots rock elsif [:throws, :shoots].include?(method_name)
RPS.play_with(object)
}
else
method_name.to_s
RPS.play { end
Sam throws paper end
Ola shoots scissors
}
RPS.play {
Sam throws rock
Ola shoots rock
}

8. Don’t try this at home
def method_missing(method_name, object=nil)
if [:paper, :rock, :scissors].include? method_name
method_name.to_s
elsif RPS.playing_with?(method_name)
RPS.play_as(Player.new(:name => method_name.to_s))
elsif [:throws, :shoots].include?(method_name)
RPS.play_with(object)
else
method_name.to_s
end
end

9. The shape of things to come
; set segment register: play = macro(
mov ax, 0b800h field = Field with(plays: [])
mov ds, ax call arguments[0] evaluateOn(field)
p1 = field plays[0]
; print "hello world" p2 = field plays[1]
; first byte is ascii code, second byte is color code.
mov [02h], 'h' case([p1 value, p2 value],
mov [04h], 'e' [:paper, :rock], win(p1),
mov [06h], 'l' [:rock, :scissors], win(p1),
mov [08h], 'l' [:scissors, :paper], win(p1),
mov [0ah], 'o' [:rock, :paper], win(p2),
mov [0ch], ',' [:paper, :scissors], win(p2),
mov [0eh], 'w' [:scissors, :rock], win(p2),
mov [10h], 'o' else, draw)
mov [12h], 'r'
mov [14h], 'l'
mov [16h], 'd'
mov [18h], '!'

10. [Hal open:[Doors getByLocation:podbay]]
HAL.open(Door.find(:all, :podbay))
Open the pod bay doors, Hal.

11. Hal, could you open those doors?
Open the doors in the pod area, Hal.
Open the pod bay doors, Hal.

12. `Twas brillig, and the slithy
toves
Did gyre and gimble in the
wabe:
All mimsy were the borogoves,
And the mome raths
outgrabe.
"Beware the Jabberwock, my
son!
The jaws that bite, the claws
that catch!
Beware the Jubjub bird, and
shun
The frumious Bandersnatch!"
He took his vorpal sword in
hand:
Long time the manxome foe
he sought --
So rested he by the Tumtum
tree,

13. Language is tricky
‣ Until the police arrest the drug dealers control the street.
‣ The complex houses married and single students and
their families.
‣ The cotton clothing is usually made of grows in
Mississippi.

14. Sub Shop DSL
rye, size:regular,
I’d like a ham and
+cheese, +ham,
cheese on rye, extra
++mayo,
mayo, hold the pickles
--pickles

15. Cucumber.rb
# language: en
Feature: Addition
In order to avoid silly mistakes
As a math idiot
I want to be told the sum of two numbers
Scenario Outline: Add two numbers
Given I have entered <input_1> into the calculator
And I have entered <input_2> into the calculator
When I press <button>
Then the result should be <output> on the screen
Examples:
| input_1 | input_2 | button | output |
| 20 | 30 | add | 50 |
|2 |5 | add | 7 |
|0 | 40 | add | 40 |

16. Nobody says this
“It was better writing ...
NSString = @"String here";
for(i=0;i<=array.size();i++)
than writing ...
string = 'String here'
for widget in container
for our project.”

17. Language is #4,891
• “It’s what the client demanded
requested”
• “It’s on the ‘approved` list”
• Works with other library/API
• It works with what we have already

18. Bright, Shiny Future
‣ JVM: Ioke, JRuby,
Clojure, Scala
‣ CLR: Ioke, IronRuby,
IronScheme, IronLisp
‣ Perl6/Parrot

19. Oh, Nothing Much, Just
Inventing New Languages

20. Credit where due
Buck Rogers Toys - http://www.bergintoys.com/sp_vehicles/2005-
Feb/index.html - Trinity College Library - http://www.flickr.com/
photos/ec-jpr/3493900135/ - Jabberwocky by Lewis Carroll -
http://www.jabberwocky.com/carroll/jabber/jabberwocky.html -
Soup Nazi / Hope by ThePeoplesCube.com - http://
thepeoplescube.com/red/viewtopic.php?t=1884 - Garden Path
Sentences by Fun-With-Words.com - http://www.fun-with-
words.com/ambiguous_garden_path.html - “Defendius door chain”
by Art Lebedev studio - http://www.artlebedev.com/everything/
defendius/ - “Perils of Modern Science” by travis76/Threadless -
http://www.threadless.com/submission/104911/
Perils_of_Modern_Science/showmore,designs - “Seven Wheel Drive”
Thanks, Sam!