SlideShare a Scribd company logo
John W. Sarkela
jsarkela@exobox.com
sarkela@home.com
  A Production Quality Smalltalk
   System for the masses
  Extend the Spirit of Camp Smalltalk
  Derived from the original Apple
   Smalltalk-80 license.
  Self hosting VM
  –  VM written in Smalltalk
  –  Smalltalk to C translator
  –  Direct object pointers
  –  Incremental Garbage Collector
  –  Dynamically loaded named primitives
  Network   Support
  –  Web Server, Web Browser, Email Client,
     Chat, Ftp, Telnet, MD5, DES . . .
  Sound   Support
  –  FM Sound Synthesis, KLATT speech
     synthesis, MIDI support . . .
  Graphics   Support
  –  3D Engine, VRML, Morphic, Wonderland
  Great   for education
  –  It’s free, it runs on all platforms, it has
     Freecell
  Suitable   for embedded devices
  –  Runtime may be made small
  –  All capabilities written in Smalltalk
  Lots   of potential for developers
  –  Functionality ready for reuse
  Tell them, “Ralph sent me.”
The UIUC summer OO design course
   used Squeak and XP to build a
   functional object swiki in four weeks
   with 6 programmers who also learned
   Smalltalk at the same time
  So many things “almost” worked . . .
  Squeak  needs a production quality
   base library
  The core team is more interested in
   experimentation and exploration
  Squeak may be the first time many
   new programmers see Smalltalk
  Most  of Smalltalk’s problems are not
   technical in nature
  Lack of success stories is not really
   the issue
  The Squeak out-of-box experience is
   enough to prevent anyone from
   exploring Smalltalk further.
  Use  a Camp Smalltalk style
   development
  Bring the Camp to developers,
   whereever they may live
  Work as closely as possible with
   Squeak Central to incorporate
   refinements into the base system
  Definea minimal development image
  Refactor this image until
  –  All methods may be compiled from
     source code
  –  There are no undeclared references
  –  All globals have a known initial state
  –  Leverage Camp Smalltalk ANSI tests
  Factor
       remaining functionality into
 modules such that
  –  There are no method or class
     redefinitions
  –  The module dependency lattice is well
     defined
  –  As many unit tests as possible are
     generated
  Refactor   the base into
  –  A headless image with just enough
     included to be able to bind image
     segments
  –  A set of bindable UI’s, including a text
     based stdin,stdout,stderr UI
     •  (Anyone for an emacs browser???)
  Build
      ImageSegments from defined
  modules

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Stable Squeak World Tour

  • 2.   A Production Quality Smalltalk System for the masses   Extend the Spirit of Camp Smalltalk
  • 3.   Derived from the original Apple Smalltalk-80 license.   Self hosting VM –  VM written in Smalltalk –  Smalltalk to C translator –  Direct object pointers –  Incremental Garbage Collector –  Dynamically loaded named primitives
  • 4.   Network Support –  Web Server, Web Browser, Email Client, Chat, Ftp, Telnet, MD5, DES . . .   Sound Support –  FM Sound Synthesis, KLATT speech synthesis, MIDI support . . .   Graphics Support –  3D Engine, VRML, Morphic, Wonderland
  • 5.   Great for education –  It’s free, it runs on all platforms, it has Freecell   Suitable for embedded devices –  Runtime may be made small –  All capabilities written in Smalltalk   Lots of potential for developers –  Functionality ready for reuse
  • 6.   Tell them, “Ralph sent me.” The UIUC summer OO design course used Squeak and XP to build a functional object swiki in four weeks with 6 programmers who also learned Smalltalk at the same time   So many things “almost” worked . . .
  • 7.   Squeak needs a production quality base library   The core team is more interested in experimentation and exploration   Squeak may be the first time many new programmers see Smalltalk
  • 8.   Most of Smalltalk’s problems are not technical in nature   Lack of success stories is not really the issue   The Squeak out-of-box experience is enough to prevent anyone from exploring Smalltalk further.
  • 9.   Use a Camp Smalltalk style development   Bring the Camp to developers, whereever they may live   Work as closely as possible with Squeak Central to incorporate refinements into the base system
  • 10.   Definea minimal development image   Refactor this image until –  All methods may be compiled from source code –  There are no undeclared references –  All globals have a known initial state –  Leverage Camp Smalltalk ANSI tests
  • 11.   Factor remaining functionality into modules such that –  There are no method or class redefinitions –  The module dependency lattice is well defined –  As many unit tests as possible are generated
  • 12.   Refactor the base into –  A headless image with just enough included to be able to bind image segments –  A set of bindable UI’s, including a text based stdin,stdout,stderr UI •  (Anyone for an emacs browser???)   Build ImageSegments from defined modules