CSSE 120: Session 4

Session 4 Preparation: Videos/Reading, Start-the-Session Quiz, and Start-the-Session Follow-Me

Videos / Reading

BEFORE this session's scheduled class time, for each of the following videos or reading:

Step 1: Watch the video (or read the reading).
Step 2: As you do so, do the associated quiz in Moodle.
Step 3: Get help on anything that is not clear to you.

Videos / Reading:

Preparation from Session 3:
- If you skipped any of the Preparation from Session 3, go back and do it now (before you do this Preparation).
Conditionals: IF and IF-ELSE and IF-ELIF-ELIF...ELSE statements: Reading.
- This and all the succeeding items in this Videos/Reading section have a quiz associated with them on Moodle.
- The above PDF was constructed from portions of Chapter 5. Conditionals, which itself is part of How to Think Like a Computer Scientist: Learning with Python 3 by Peter Wentworth, Jeffrey Elkner, Allen B. Downey, and Chris Meyers.
- The book is a nice online resource, as are the other books from the Open Book Project.
The Accumulator Pattern (revisited): Video [9:36]
- This video extends the accumulator pattern from the summing pattern that you have seen previously to include the counting and in-graphics accumulator patterns.
- The video uses a graphics system call Zellegraphics that preceded RoseGraphics, so you will see zg instead of rg and other such small changes from what we use now.
First Do a Concrete Example By Hand: Video [10:39]
- In almost ANY non-trivial software development coding problem, you simply MUST do a concrete example by hand, as shown in this video.
- Note: The video uses the following example: Given a line, draw a diamond from the line. The video should have said that the given line is the upper-left line of the diamond. Instead, the video wrongly spoke of "positive slope".
Optional:
- You might find it helpful to review previous videos, especially the ones on:
  - Thinking Like a Computer: Control Flow , and
  - Thinking Like a Computer: Namespaces, Parameters, and Returns.

Start-the-Session Quiz

AFTER completing the Preparation to the left:

Step 1: Do this Start-the-Session Quiz.
- You do not have to print the quiz (unless you want to).
- Just hand-write your answers on paper or type your answers into a file, whichever is easier for you.
Step 2: Check your own answers by watching the videos listed below.
- Of course, do the quiz BEFORE checking its answers!
- Check your answers carefully!
Step 3: Turn in your answers to the Before-the-Session Quiz in the usual way, on Moodle, via the item named Turn in your Before-the-Session Quiz here.
Step 4: Get help on anything that is not clear to you.

Videos with solutions to the Start-the-Session Quiz:

Solutions to the Start-the-Session Quiz: Video [16:58]

For your reference, here is a written Answer Key to the above Start-the-Session Quiz.

Start-the-Session Follow-Me

AFTER completing the Start-the-Session Quiz to the left:

Use this link to your Session 4 assignment on GitHub Classroom, following the same instructions that you used to get the Session 2 project into PyCharm, but using the above link instead of the one to Session 2 project.
Step 2: Watch the Follow-Me videos listed below, and as you watch each one:
Step 3: Do the coding in PyCharm, following what you see on the video.
- You can do the coding as the video does it or by reviewing the video afterwards (your choice).
- The key is to UNDERSTAND what you are coding, not merely type what the video shows.

Follow-Me videos:

An introduction to Session 4: Video [4:51]
For m1r_accumulator_examples, Part 1: Video [5:16]
For m1r_accumulator_examples, Part 2: Video [11:07]
For m1r_accumulator_examples, Part 3: Video [7:53]