Introduction to CS2340

1
Introduction to CS2340

• Objects and Design
• Spring 2004

2
Spring 2004 Semester

• Professor
• Rich LeBlanc
• E-mail rich_at_cc.gatech.edu
• Office Technology Square Research Building, room
  519
• soon in College of Computing Building

3
Meet the TAs

• Ellie Harmon
• Jonathan DAndries
• Chris Hunt

• Randy Rockinson
• Lex Spoon
• Chris Verges

4
Books this Semester

• Required Texts
• Guzdial Squeak Object-oriented design with
  multimedia applications
• Guzdial Rose (Eds) Squeak, Open Personal
  Computing and Multimedia

5
Content of Class

• Focus on OOA, OOD, OOP
• OOA CRC Cards
• OOD UML Class Diagrams
• OOP Squeak
• User interfaces Design, building, evaluation
• Cap of languages focus (follow-on to Languages
  and Translation)

6
Structure of Class

• You have a major, team-based project
• Spring 2004
• Build and manipulate representations of
  genealogical information
• Lectures are here to provide you with theory,
  examples, issues
• BUT DO COME! Huge differences in grades

7
Grading Policy

• 25 Midterm
• 10 Quizzes (3)
• In-class, open-book, 15-20 minutes
• 30 Final
• 35 Project Assignments

8
Resources

• CoWeb http//coweb.cc.gatech.edu/cs2340/
• Newsgroup git.cc.class.2340
• TAs hang out there
• No guarantee of 24-hour coverage, nor late night
  (nor early morning!) coverage

9
Where to get Squeak, lecture notes

• On the CoWeb
• Well be using Squeak 3.6 (latest production
  version, not whats on your CD, but whats on
  your CD should work.)
• Older versions of lecture notes are all on the
  book CD (Co-web will have latest and greatest).
• www.squeak.org

10
On the CoWeb

• Definition of project
• Milestones (Turn-ins) - ALL OF THEM
• Roughly every two weeks
• First two are individual, all others are
  team-based
• First milestone January 20 (DO IT YOURSELF!)
• First quiz January 15
• FAQs, links to external resources, etc.
• Cases page where any code can be reused without
  honor code violation!
• Strongly recommended Whos Who page

11
Project This Semester

• Genealogy repository tools
• M1 (individual)
• M2 (team)
• M3 Design everything for M4-M7.
• M4
• M5
• M6
• M7

12
Philosophy of the Course

• The course is on design, for novice designers
• If you know UML, Corba, COM, and XP already,
  great. Most people here dont.
• But theres a big focus on learning, not just
  lecturing at you.
• So you have to implement your designs live in
  them. Figure out where theyre bad
• The course isnt explicitly on programming in
  Smalltalk, but implicitly (to get you design
  feedback), it is. Quizzes will focus on Smalltalk
  programming and OO design principles

13
Why Smalltalk?

• Why not Java? Why not C?
• Marvin Minsky If you only know something in one
  way, you dont know it at all.
• Faculty agreed that you should program seriously
  in some language that is not C-based.
• Other reasons
• Great for UI/Prototyping
• Different model for programming Embedded
  environment
• All the sources are there for everything

14
Why this class can be aggravating

• Its not about job skills, per se
• No Delphi or Visual Basic here
• Few job postings for Squeak these days (but
  increasing number for Smalltalk)
• Its about ways of thinking that are core to CS,
  about ways of designing programs
• About where the core ideas of computers today
  came from
• Its about designing, critiquing designs, making
  tradeoffs, and making choices
• Languages come and goprinciples remain
• Squeakers hate documentation

15
Approach of Book (and elsewhere)

• Concrete before Abstract
• Build things before design them
• Learning involves testing and failure
• You have to try things in Squeak
• Generation and Inquiry, over Transmission
• There is no Squeak API
• But there are lots of great tools for poking
  through the system
• We'll teach the tools to help you learn how to
  figure it out for yourself

16
How to Get an A

• Come to lecture
• Big difference in grades for people that come
• Do the work
• Not at the last minute!
• Dont merge team work at last minute!
• Work as a team (on team projects)
• Dont just staple work together
• Do design as a team

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How to Get an A (Part 2)

• Ask for help and learn from mistakes
• See your TAs
• They know much more about Squeak than you
• Demo for your TAs, even if its informal
• Pick up your work
• So you can learn from your mistakes
• Learn Squeak
• Do examples
• Poke around in Squeak to find things

18
How I Learned to Program

• Fortran
• IBM 360 Assembler
• MIX Assembler Lang
• Lisp
• SNOBOL
• PDP-8 PDP-11 Datacraft Assembler
• Algol
• Univac 1108 Asm.

• Pascal
• Simula-67
• Ada
• Prolog
• awk
• Smalltalk
• Eiffel
• Java