EBoard 12: Pause for breath (Section 2)

PLEASE RETURN TO YOUR PLACE FROM LAST CLASS SO THAT YOU CAN FINISH THE LAB!

Approximate overview

• Administrative stuff [10 min]
• A problem [10 min]
• Some notes on Wednesday’s lab [10 min]
• Questions
• Lab
• Turn in lab [5 min]
• Quiz [15 min]

Administrative stuff

• Oh not! You’re stuck with Sam again!
• MP3 has been updated. A few more updates are likely coming (mostly to the rubric).
  • See link to starter code on Teams.
• For redos: Make sure to submit a CHANGES.rkt file when your redo is ready for grading.

Upcoming activities

Academic

• Tuesday, 2024-02-20, 7:00pm, Science 3819. Mentor Session.
• Thursday, 2024-02-22, 4:00pm, Room TBD. CS Extra: Declaring a CS Major.
• Thursday, 2024-02-22, 7:00pm, Science 3819. Mentor Session.

Cultural

• Friday, 2024-02-16, 4:00–5:00pm, HSSC N1170 (Global Living Room). Middle of Everywhere.
• Sunday, 2024-02-18, 7:00–9:00pm, Harris Cinema. The Moth Storytelling Slam.

Athletics

• Friday through Sunday, 2024-02-16 through 2024-02-18. Osgood Pool. Midwest Swimming and Diving Conference Championships.
• Saturday, 2024-02-17, 1:00–3:00pm, Darby. Men’s Basketball vs. Monmouth.
• Saturday, 2024-02-17, 2:00–5:00pm, Field House. Women’s Tennis vs. Ottwawa.
• Saturday, 2024-02-17, 3:00–5:00pm, Darby. Women’s Basketball vs. Monmouth.

Wellness

• Tuesday, 2024-02-20, noon-1pm, BRAC P103. HIIT and Strength Fitness Class.
• Tuesday, 2024-02-20, 12:15–12:50, Bucksbaum 131. Yoga in the Museum.
• Tuesday, 2024-02-20, 4pm, BRAC P103 (Multipurpose Dance Studio): Yoga.

Upcoming work

• Friday, 2024-02-16, 11:00pm: [SoLA 1 post-reflection]
• Friday, 2024-02-16, 11:00pm: [MP3 pre-reflection]
• Sunday, 2024-02-18, 11:00pm: Readings
  • List basics
  • Transforming lists
  • [Submit on Gradescope]
• Sunday, 2024-02-18, 11:00pm, Redo of MP1
  • [Submit on Gradescope]
• Monday, 2024-02-19, 8:30am: Submit today’s lab writeup.
  • [Submit on Gradescope]
  • Preferred: Submit before the end of class today.
• Wednesday, 2024-02-21, 11:00pm: MP3

Friday PSA

• You are (probably) awesome.
• People care about you.
• Please take care of yourselves.
• Moderation
• Remember that you need not drink or smoke or … to be a good Grinnellian.
• Be who you are; don’t succumb to (imagined) peer pressume.
• CONSENT IS ESSENTIAL

A problem

This should be like vomit in the dorm lounge. Everyone gets charged unless the people who vomited own up to it.

Some notes on Wednesday’s lab

Yay! Potentially some more TPS activities.

(define median-of-three
  (lambda (x y z)
    (cond 
      [(or (<= x y z) (<= z y x))
       y]
      [(or (<= y x z) (<= z x y))
       x]
      [(or (<= x z y) (<= y z x))
       z]
      [else
       "AGH! Math failed."])))

“I want to take the three numbers and remove the largest and remove the smallest.”

(define median-of-three
  (lambda (x y z)
    (- (+ x y z)
       (max x y z)
       (min x y z))))

• Put ‘em in a list and use some magic mechanism for removing elements from lists.
• If x is not the min and not the max, it must be the median.
• Reminder: There are many ways to think about solving particular problems.

Talk about talking about how you did

• Talking about how you did on an assignment (in terms of grade or time spent) is unlikely to have positive value.
• Conversations about “How did you solve this problem?” are good.
• REMINDER: DO NOT TALK ABOUT THE SOLA WHILE THE SOLA IS LIVE!

Questions

Administrative

What are today’s quizzes?

There is a conditionals quiz. It assumes you’ve done the four or so parts of exercise 1 on the conditionals lab and understood them. It does not assume you’ve done the rest.

There is a tracing quiz.

You can do both.

Students without accommodations taking both should try to finish by 4:05 pm.

Students with accommodations taking both should try to finish by 4:20 pm (assuming you have a 150% accommodation). All students can take this choice, whether or not they have an accommodation.

Students who need a quiet space can move into Prof. Perlmutter’s lab. All students can take this choice, whether or not they have an accommodation, provided they are quiet.

What happens if no one admits responsibility?

Prof. Perlmutter and Prof. Rebelsky will be discussing that issue.

MP3

For part 1d, what do you mean about 8bit images?

Eight equally distributed values for the red compoennt.

Eight equally distributed values for the green component.

Four equally distributed values for the blue component. E.g., 0, 85, 170, 255

Conditionals

Misc

Is everything that goes wrong with the class probably Sam’s fault?

Yes.

Lab

If you finish early, please work on the extra problems at the end.

If you don’t finish the lab, please submit what you have and then try to complete it on your own or with a partner.

; PROF PERLMUTTER'S PROXY SAID WE COULD STOP HERE

The autograder does not seem to be working correctly. Stay tuned while we figure out why. (Just submit it with the non-working autograder.) (Sam hates computers.)