Eboard 10 (Section 2): Inheritance
You are probably being recorded (and transcribed) [at least if Sam is here and can get the technology working]
Approximate overview
- Preliminaries
- Notes and news
- Upcoming work
- Tokens
- Questions
- MP3
- MP5
- Lab
Preliminaries
News / Notes / Etc.
So much stuff to discuss. Feel free to ask questions as we go.
Grade reports
- Grade reports distributed Sunday night. I’ll try to distribute those each
week after I grade the SoLA.
Learning outcomes on lab reports
- When you fill in learning outcomes on a lab report, I’d recommend that
you fill them in a form that you could come back to later and review.
Answers like “I learned how a certain code can take different parameter
types” or “I learned about inheritance” doesn’t let you do so.
Pre-assessments
- When you fill in the pre-assessment, please try to ask questions. Asking
(good) questions is a skill that you need to develop, so practice!
- When I ask you to list resources, you should list specific resources
(preferably with URLs), such as “the reading on inheritance” and not
something vague like “readings”.
General skills
- I put this in my last email, but I’ll remind you again. At this point
in the semester, you should know our core tools.
- You should be able to compile and test code in Maven.
- You should be able to run and test code in VSCode.
- You should be able to debug code in VSCode, particularly failed tests.
- You should be able to push changes to your code to GitHub.
- Why is that I keep saying “Don’t use
git add .; add the files individually”,
and you folks keep typing git add .?
- This is a rhetorical question. Just don’t use
git add ..
Mini-projects
- Note that the primary goals of MP4 are:
- To give you the experience of building a real data structure that
others could use.
- To give you more practice writing tests.
- The potential chaos of the shared testing repo is just a pleasant
additional outcome.
- Because there were style issues in the original repo for MP4, I’m
increasing the number of style issues permitted for M to 20 and E to 10.
- We’ve already had issues with the shared testing repo. I’ve been cleaning
them up as we go.
- Incorrect code was pushed (at least twice). Please make sure to
run
mvn test and ensure that the errors are only test errors.
- Extra files were added (
.DS_Store, presumably by someone who
used git add .)
- At least one test placed inappropriate restrictions on the order
in which values are reported in
toString().
- The code got reformatted.
- It’s been suggested that I remind you that when you submit code to Gradescope
from GitHub, and then update the code on GitHub, it doesn’t automatically.
get updated on Gradescope.
- Also: GitHub submission is the preferred mechanism for Gradescope.
- I’m not sure whether I’ll be here on Thursday, so I’ll talk a little bit
about MP5 today.
Upcoming work
- Today, 2024-10-01
- Wednesday, 2024-10-02
- Thursday, 2024-10-03
- Friday, 2024-10-04
- Sunday, 2024-10-06
- Monday, 2024-10-07
- Tuesday, 2024-10-08
- Redo of MP1
- Include the file
CHANGES.md that indicates what changes you made.
- If you got an R or above, the first redo is free.
Tokens
If you’d like to suggest token events, please let me know in advance of
class.
Academic/Scholarly
- Thursday, 2024-10-04, 4:00-5:00 p.m., Science 3821.
Welcome to Computer Science at Grinnell
- Sunday, 2024-10-06, 7:00–8:00 p.m., Science 3819.
Mentor Session
- Tuesday, 2024-10-08, Noon–1:00 p.m., JRC 224A (Day PDR).
CS Table
Cultural
Multicultural
- Friday, 2024-10-04, 4:00-5:00 p.m., HSSC N1170 - Global Living Room.
Middle of Everywhere.
Peer
Wellness
- Tuesday, 2024-10-01, 4:30–6:30 p.m., BRAC P103 (Dance Studio).
Wellness Yoga
- Tuesday, 2024-10-01, 4:30–6:30 p.m., ???.
Forest Bathing (signup required)
- Tuesday, 2024-10-08, 4:30–6:30 p.m., BRAC P103 (Dance Studio).
Wellness Yoga
- Tuesday, 2024-10-08, 4:30–6:30 p.m., ???.
Forest Bathing (signup required)
Misc
- Friday, 2024-10-04, 5:00 p.m.-6:00 p.m., Merrill Park West.
CS Picnic!
- Friday, 2024-10-04–Sunday, 2024-10-06. JRC 101.
Pioneer Weekend
Other good things (no tokens)
- Tuesday, 2024-10-01, 4:30–6:30 p.m., Springer Field.
Men’s Soccer vs. Knox
- Tuesday, 2024-10-01, 7:00–9:00 p.m., Darby.
Volleyball vs. Beloit
- Wednesday, 2024-10-02, 4:00–6:00 p.m., Springer Field.
Women’s Soccer vs. Knox
- Friday, 2024-10-04, 5:30–8:30 p.m., Natatorium.
Scarlet and Black
Questions
Questions on SoLAs
Why does it take you so long to get SoLAs back to us?
It’s the nature of the beast. I probably spend five minutes on
each submission. 5 LAs x 40 submissions/LA x 5 minutes/submission
= 600 minutes, or about ten hours. (I expect time to go down as you
start getting used to LAs, since I can often just check “Satisfactory”
for correct LAs.)
Questions on MP4
See the assignment for most of the Q&A. This section is here to give you the chance to ask more questions.
I’m worried that people will push incorrect tests.
It’s a reasonable worry. We all write incorrect tests (even me). But
I’ll be running tests against my code and will try to correct them as
I find them.
If you find what seems to be an incorrect test before I do, please
let me know.
Other administrative questions
Other questions
MP3
New AsciiBlocks
Basic blocks
Alphabetical- Fill a rectangle with the alphabet.
Chessboard- Build a “chessboard” of alternating spaces and some character.
Circle- A filled circle.
Ladder- A ladder of a character side with vertical repetions.
Building new blocks from old
BezierCurveStamp- Another block with a Bezier curve superimposed on it.
Borders- Grabs only the “borders” of the block (first row, last row, first column,
last column).
Checkerboard- Create a checkerboard of two blocks.
DiagonalFlip- Diagonally “flip” a block.
DropShadow- Another block with a drop shadow added.
DShift- Diagonally shift another block.
Encrypted- Another block with every character encrypted using something like
a Caesar cipher.
Hollow- The outer edges of another block.
Matrice- Make a matrice (matrix?) from another block.
PatternBorder- Another block surrounded by a pattern of letters
Quartered- Another block broken into four parts with lines around them.
RandomBlock- Randomizes the characters in each row of a block.
ReplaceChar- Replace all instances of one character in a Block with another one.
Transpose- Transposes the block (flips the axes).
Ascii Art
MP5
Build the back end for a AAC.
Goals
- Get you to think about accessibility.
- Write code that fits into a larger project (even more so than in the
AsciiBlocks project).
- Reuse your
AssociativeArrays.
- See a different model of project and assignment design.
Notes:
- No Maven!
- Dr. Baker uses a very different coding style than Google Style Guide for
Java.
- No style requirements in assignment.
- Please try to write readable code.
- Not yet much of a testing infrastructure (hopefully forthcoming).
Questions
Lab
The person closer to the board is Driver A. The person further from the
board is Driver B.
Make sure that the name of the repo ends with -maven.