A Small Smalltalk Talk [RUG::B edition]

Transcript

1. A Small
   talk
   SMALLTALK
   Denis Defreyne / @ddfreyne / denis@stoneship.org
   

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2. Bad news:
   Smalltalk is dead.
   SMALLTALK
   

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3. Three reasons to
   look into SMALLTALK
   

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4. 1.
   Smalltalk is is worth learning
   because of its heritage.
   SMALLTALK
   

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5. 2.
   Smalltalk is is worth learning
   because it is weird.
   SMALLTALK
   

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6. 3.
   Smalltalk is is worth learning
   because it encourages exploration.
   SMALLTALK
   

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7. HERITAGE
   

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8. is like Ruby
   SMALLTALK RUBY
   

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9. is like Ruby
   RUBY SMALLTALK
   

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10. Smalltalk ’s model of object orientation
    is identical to ’s
    RUBY
    SMALLTALK
    

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11. 'Hello'.upcase
    'Hello' asUppercase.
    RUBY
    SMALLTALK
    

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12. person = Person.new
    person.first_name = 'Denis'
    

    person := Person new.
    person firstName: 'Denis'.
    SMALLTALK
    RUBY
    

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13. research_paper.respond_to?(:complete?)
    research_paper.send(:add_random_paragraph)
    

    researchPaper respondsTo: #isComplete.
    researchPaper perform: #addRandomParagraph.
    SMALLTALK
    RUBY
    

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14. people.each { |person| self.send_spam_to(person) }
    people do: [ :person | self sendSpamTo: person ].
    people do: [ :each | self sendSpamTo: each ].
    RUBY
    SMALLTALK
    

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15. people.each { |person| self.send_spam_to(person) }
    people do: [ :person | self sendSpamTo: person ].
    people do: [ :each | self sendSpamTo: each ].
    RUBY
    SMALLTALK
    

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16. people.select { |person| person.adult? }
    people.select(&:adult?)
    

    people select: [ :person | person isAdult ].
    people select: #isAdult.
    RUBY
    SMALLTALK
    

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17. people select: #isAdult.
    people detect: #isAdult.
    people reject: #isAdult.
    people collect: #firstName.
    people inject: 0 into: [ :memo :each | memo + each age ]
    SMALLTALK
    

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18. is a cleaner
    SMALLTALK RUBY
    

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19. poke = lambda { |person| person.poke }
    people.each(&poke)
    

    poke := [ :person | person poke ].
    people do: poke.
    RUBY
    SMALLTALK
    

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20. if students.empty?
    cancel_class
    end
    

    students isEmpty ifTrue:
    [self cancelClass].
    RUBY
    SMALLTALK
    

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21. as inspiration
    SMALLTALK
    

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22. WEIRDNESS
    

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23. (at all)
    is not like
    SMALLTALK RUBY
    

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24. Ruby
    RUBY
    

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25. gem
    RUBY
    

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26. Smalltalk
    SMALLTALK
    

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27. Smalltalk
    SMALLTALK
    

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28. Smalltalk
    SMALLTALK
    =
    

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29. Smalltalk
    SMALLTALK
    – your application
    =
    

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30. Smalltalk
    SMALLTALK
    – your application
    – standard library
    =
    

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31. Smalltalk
    SMALLTALK
    – your application
    – standard library
    – other libraries
    =
    

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32. Smalltalk
    SMALLTALK
    – your application
    – standard library
    – other libraries
    – compiler
    =
    

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33. Smalltalk
    SMALLTALK
    – your application
    – standard library
    – other libraries
    – compiler
    – IDE
    =
    

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34. Smalltalk
    SMALLTALK
    Pharo.image
    

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35. Smalltalk
    SMALLTALK
    Pharo.image
    FRESH
    

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36. Smalltalk
    SMALLTALK
    COPY
    Pharo.image
    FRESH
    

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37. DEMO
    

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38. EXPLORATION
    

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39. DEMO
    

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41. ✓ Heritage
    

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42. ✓ Heritage
    ✓ Weirdness
    

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43. ✓ Heritage
    ✓ Weirdness
    ✓ Exploration
    

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44. Why is wh dead?
    SMALLTALK
    

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46. 1. The Smalltalk environment is isolated.
    

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47. 1. The Smalltalk environment is
    2. The Smalltalk community suffers from NIH.
    

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48. 1. The Smalltalk environment is
    2. The Smalltalk community suffers from
    3. Smalltalk isn’t revolutionary anymore.
    

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49. Q & A
    

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50. @ddfreyne
    denis@stoneship.org
    Denis Defreyne
    Former Smalltalk developer
    DENIS DEFREYNE
    

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