1. Excellence is a Habit Feb 3 2003 Lecture 14 We are what we repeatedly do. Excellence, then, is not an act, but a habit.” - Aristotle

2. February 3 2003Lecture 142 Outline  Previous Business – Midterm examination results – Homework results  New Business – Structure of course changing – Moving from large “Project-centered” approach (although still available as extended case study) – Moving to smaller, more-focused “caselets” that will build towards single application

3. February 3 2003Lecture 143 First the fun stuff…

4. February 3 2003Lecture 144 More fun stuff…

5. February 3 2003Lecture 145 Last fun stuff…

6. February 3 2003Lecture 146 Now the midterm details  20% of your final grade  Average: 64 ± 13 – < 519 – 51-609 – 61-7513 – > 7511

7. February 3 2003Lecture 147 Downloads Roughly 50% of lecture downloads in four days

8. February 3 2003Lecture 148 Downloads Only six downloads of visitor?

9. February 3 2003Lecture 149 Analysis  Students have not been given enough opportunities to excel  Students must take ideas from the readings and lectures into weekly activities  Study habits based on directed questions – Come up with your own: don’t wait for me – Focus on consequences and implementation issues

10. February 3 2003Lecture 1410 Midterm postmortem  Review for content, math errors  Problems? See me in my office hours

11. February 3 2003Lecture 1411 HW1 & HW2 postmortem  TAs report only 3 students showed up  I’ve seen no more than 3 students  When should you attend office hours? – After a HW has been graded and returned – While working on a HW – When a topic is not clear from lecture

12. February 3 2003Lecture 1412 Homework 3: Question 1  Forward Containment & Visitors  Tests your understanding of Visitor Part SubPart 1 *

13. February 3 2003Lecture 1413 Handouts today  GOF: Singleton Design Pattern  GOF: Visitor Design Pattern  GOF: Factory Method Pattern

14. February 3 2003Lecture 1414 Abstract Factory  Intent – Provide an interface for creating families of related objects without specifying their concrete classes  Motivation – The new operator should never be placed within a series of forked if statements.

15. February 3 2003Lecture 1415 Small Examples  Only partially useful (since scaling not immediately apparent).  US Factory US Factory  Japanese Factory Japanese Factory

16. February 3 2003Lecture 1416 Tuesday Assignment  HW3 – Get started. Download the sample code. Run it.  Review Abstract Factory & Factory Method