TL;DR: Learning Smalltalk

• Objective
• Learn
• Apps
• Articles
  • 0. Installing & Launching
  • I. Simple program
  • II. Code visualization using Moose
  • III. Simple parser using SmaCC
  • IV. add Smalltalk to Excercism.io
• Learnings

1. Run Pharo http://pharo.org/
2. Use Moose http://www.moosetechnology.org/
3. Try SmaCC https://github.com/ThierryGoubier/SmaCC

Main links:

• http://pharo.org/
• http://www.moosetechnology.org/
• http://blog.fossasia.org/pharo-launcher-what-how-pharoinprogress/

• http://ceronio.net/2017/07/first-steps-with-pharo-smalltalk/
• PharoByExample

• https://github.com/SquareBracketAssociates/UpdatedPharoByExample
• https://ci.inria.fr/pharo-contribution/job/UpdatedPharoByExample/lastSuccessfulBuild/artifact/book-result/PharoTour/PharoTour.html

• http://files.pharo.org/media/pharoCheatSheet.pdf
• http://files.pharo.org/books-pdfs/booklet-Smacc/2017-05-05-Smacc-Spiral.pdf
• https://pharoweekly.wordpress.com

• Code visualization https://wettel.github.io/codecity.html
• Code parsers https://github.com/ThierryGoubier/SmaCC (\w PetitParser, both are part of Moose)

-[x] https://medium.com/smalltalk-talk/how-learning-smalltalk-can-improve-your-skills-as-a-programmer-fc5b2f56685 -[ ] https://medium.com/@richardeng/an-open-letter-to-all-universities-ad98af4a96b3 -[ ] https://medium.com/smalltalk-talk/in-praise-of-the-very-best-programming-language-eae36ae434af

brew cask install pharo-launcher
# Chose Moose 6.0
# follow http://themoosebook.org/book/index.html#h1mooseinanutshell
Pharo6.0.app/Contents/MacOS/Pharo Pharo6.0.app/Contents/Resources/Pharo6.1.image

World (click) -> Playground

ProfStef go. (cmd+d to evaulate, using "Do It")

a := OrderedCollection new
  add: 1;
  add: 2;
  add: 3;
  yourself.

a. (cmd+p to print)

Number extend [
  my_factorial [
    (self < 2) ifTrue: [ ^1 ]
               ifFalse: [ |c|
                 c := OrderedCollection new.
                 2 to: self do: [ :i | c add: i ].
                 ^ (c fold: [ :a :b | a * b ] ) ]]].

7 factorial printNl.


a := OrderedCollection new
  add: 1;
  add: 2;
  add: 3.

Transcript show: a.

Playground/workspace: "Do it", "Print it", "Insepct it", "Do it and go" (for visualizations) Transcript as console.log or System.out System Browser message or cmd+b Spotter - just Shift+Enter

• #class
• #implementor

• Extract the data, build model

  wget .../jdt2famix-bin-1.0.3.zip
  unzip jdt2famix-bin-1.0.3.zip
  git clone --depth 1 git@github.com:rastaman/argouml-maven.git
  cd argouml-maven
  mvn dependency:copy-dependencies -DoutputDirectory=dependencies -DoverWriteSnapshots=true -DoverWriteReleases=false
  ../jdt2famix-1.0.3/jdt2famix.sh
  

• Open Moose: World (click anywhere) -> Moose

• Load the model: MSE (right corner) -> coose "argouml-maven.mse"

• Select just loaded "argouml-maven" model

• Select "All methods"

• Visualize all/@Deprecated methods

  view := RTMondrian new.
  
  view shape circle
  	if: [ :each | each isAnnotatedWith: 'Deprecated' ]
  	color: Color red.
  	
  dep := (self, ( self flatCollect: #clientTypes ) ) asSet.
  
  view nodes: dep.
  view layout grid.
  view

• World (click anywhere) -> Tools -> SmartCC Parser Generator
• Simple grammar

  <number> : [0-9]+; 
  <whitespace> : \s+;
  
  Expression 
  	: Expression "+" Number
  	| Number
  	;
  Number 
  	: <number>
  	;
  

• add Scanner/parser names

Options -> Scanner Class
Options -> Parser Class

• File -> Save
• Test tab

  3 + 4
  

  Validate: (Select text) -> Evaluate Inspect AST: (Select text) -> Inspect

• was a request, but un-maintained exercism/discussions#143 https://github.com/exercism/trackler/commit/a3649436fa532e9c5f80b893a95206273a3110e4

• https://github.com/exercism/request-new-language-track

• new project \w Github https://github.com/dalehenrich/metacello-work/blob/master/docs/GettingStartedWithGitHub.md

• Test + CI https://docs.travis-ci.com/user/languages/smalltalk/ https://ci.inria.fr/pharo-contribution/job/UpdatedPharoByExample/lastSuccessfulBuild/artifact/book-result/SUnit/SUnit.html https://github.com/hpi-swa/smalltalkCI#how-to-travis

• image-based approach to programming (Docker/VirtualBox)
• everything is an object (blocks, control structures, etc) that sends messages
• Less is more: No type declarations, no primitive objects, no generic types, no modifiers, no operators, no inner classes, no constructors, and no static methods
• Awesome tooling: System Browser, Spotter
• at least single VM tree: https://github.com/OpenSmalltalk/opensmalltalk-vm
• Existing grammars in SmaCC: JS, Java, C/C#, etc

• fragmentation of the world: VisualWorks, Dolphine, Squeak, Pharo, GemTalk, ...
• external Pharo-launcher to manage VMs/Images that the OS app loads
• no propper default keybidings support for editors :/