CS 2000 - Fall 2025.

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Welcome to CS 2000! 10/22/2025

Video of the Day

Socratica Python videos:

Logical Image of the day

Logical problem of the day

(From Car Talk) It is a little known fact, for the purposes of this puzzler, that potatoes are 99% water and only 1% potato. Or 1% dry matter, the stuff that makes a potato a potato.

So, imagine you were to take 100 pounds of potatoes and you set them out on your back porch to dry out. You leave them out in the sun. When you do this, they will start to dry out.

As they dry out, of course the water begins to evaporate. And after a while enough water has evaporated so that the potatoes are now 98% water.

If you were to weigh those potatoes at that moment, when they are 98% water, how much lighter would they be?

https://pollev.com/slade You may also download the app to your phone. Use the "slade" poll id.

Canvas Quiz of the Day (need daily password)

Most days, there will be a simple canvas quiz related to the lecture. You need a password to activate the quiz, which I will provide in class. These quizzes will count toward your class participation grade. The quiz is available only during class. Note: each quiz is now worth 5 points.

Click for today's quiz.

Lecture 15: Data Structures.

Administrivia

  • I have office hours Wednesdays from 4-6 pm, on zoom, id 459 434 2854.

  • I will be available for lunch on Mondays at 1 pm in Morse.

  • ULA office hours are found at Ed Discussions on Canvas.

  • CS Peer Advisers. Fall 2025 Peer Advisors Office Hours Schedule.

  • Homework assignments: [Assignments]. hw4 is now available.

  • Python Tutor

    Announcements

  • Yale Information Society Project See this week's events.

  • Office of Career Services STEMConnect Pop Up advising Fall schedule. Drop in to one and have your resume reviewed, hear advice about finding internships, and learn more about how to get connected to alumni for networking opportunities.

    Midterm Exam II: Thursday November 13th, 7pm, DL 220

    The second midterm will similar to the first. You will have 2 hours. Here is a sample midterm exam. (solutions) There will also be a question on data structures.

    There will be a UNIX question, as in the first midterm. Here is a sample UNIX transcript (solutions) UNIX will cover through principle 4.

    old review slides

    Data Structures

    DataStructures.html (jupyter) Data Structures - queue2.

  • Iterators.html
  • Decorators.html
  • Exceptions.html

    Getting to know UNIX

    UNIX Introduction Principle 3.
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