CSC309 Lecture 13

Software Engineering II
Pair Programming
(202305)

Transcript

1. jgs
   CSC 309
   Software Engineering II
   Lecture 13:
   Pair Programming
   Dr. Javier Gonzalez-Sanchez
   javiergs@calpoly.edu
   www.javiergs.com
   Building 14 -227
   Office Hours: By appointment
   

   View Slide

2. jgs
   Previously …
   

   View Slide

3. jgs
   Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 3
   Tool
   

   View Slide

4. jgs
   Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 4
   Maven Directories
   A build automation tool used
   

   View Slide

5. jgs
   Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 5
   Options
   
   org.jfree
   jfreechart
   1.5.3
   
   

   View Slide

6. jgs
   Pair Programming
   Reference:
   On Pair Programming by Martin Fowler (Agile, Architecture, Refactoring)
   https://martinfowler.com/articles/on-pair-programming.html
   

   View Slide

7. jgs
   Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 7
   § Best programs and designs are done in pairs because you can
   criticize each other, find each other’s errors, and use the best ideas.
   - Jean Bartik (one of the very first programmers)
   § Write all production programs with two people sitting at one machine.
   - Kent Beck (Agile, JUnit)
   Pair Programming
   

   View Slide

8. jgs
   Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 8
   § The process starts with the developers receiving a well-defined task.
   § They agree on one small goal at a time.
   § They take turns to code or review each other's work.
   § Rotating roles regularly helps keep both developers alert and engaged.
   § Enable senior developers to share their knowledge and working habits
   § Help new team members get up to speed on a project.
   Process
   

   View Slide

9. jgs
   Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 9
   § Driver (the person on the keyboard). Focused on completing the tiny goal at
   hand, ignoring larger issues for the moment. A driver should always talk
   through what they are doing while doing it.
   § Navigator (the person observing). They review the code on the go, gives
   directions, and shares thoughts. They have an eye on the larger issues, and
   bugs, and make notes of potential next steps or obstacles. They are in
   control of the strategic or architectural elements. As a navigator, leave the
   details of the coding to the driver – your job is to take a step back and
   complement the driver’s tactical mode with medium-term thinking.
   Roles
   

   View Slide

10. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 10
    • Equally engaging pairs. If both developers do not equally engage in the
    project, then there is less chance that knowledge will be shared
    • Social and interactive process. It is hard for those who work better alone.
    Problem
    

    View Slide

11. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 12
    • Consistent communication
    • Switch roles
    • Pair up carefully (select your pair).
    • A familiar development environment
    • Work at a pace that fits both developers.
    So, best practices
    

    View Slide

12. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 13
    Let’s Work
    

    View Slide

13. jgs
    Test Yourselves
    

    View Slide

14. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 15
    Project – User selects Cluster and clicks Run
    ✅
    

    View Slide

15. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 16
    Issues
    
    nz.ac.waikato.cms.weka
    weka-stable
    3.8.0
    
    

    View Slide

16. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 17
    Code
    

    View Slide

17. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 18
    Code
    

    View Slide

18. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 19
    Code
    

    View Slide

19. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 20
    Issues
    https://github.com/javiergs/Temporal/blob/main/Main.java
    

    View Slide

20. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 21
    Questions
    

    View Slide

21. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 22
    Office Hours
    Tuesday and Thursday 3 - 5 pm
    But an appointment required
    Sent me an email – javiergs@calpoly.edu
    

    View Slide

22. jgs
    

    View Slide

23. jgs
    CSC 309
    Software Engineering II
    Lab 13:
    Pair Programming
    Dr. Javier Gonzalez-Sanchez
    javiergs@calpoly.edu
    www.javiergs.com
    Building 14 -227
    Office Hours: By appointment
    

    View Slide

24. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 25
    Think about this
    1. Select your pair
    2. Understand the task
    (described before)
    3. Chose and set up your
    environment
    4. Be ready to work
    

    View Slide

25. jgs
    Javier Gonzalez-Sanchez | CSC 309 | Winter 2023 | 26
    Project – User selects Cluster and clicks Run
    ✅
    

    View Slide

26. jgs
    CSC 309 Software Engineering II
    Javier Gonzalez-Sanchez, Ph.D.
    javiergs@calpoly.edu
    Winter 2023
    Copyright. These slides can only be used as study material for the class CSC308 at Cal Poly.
    They cannot be distributed or used for another purpose.
    

    View Slide