CSC151.02 2016S, Class 05: RGB Colors ===================================== * New Partners! (Take a card to figure out where you are and who your partner will be.) * Don't forget to introduce yourself to your partner! _Overview_ * Preliminaries. * Admin. * Upcoming Work. * Extra Credit. * Questions. * Lab. Preliminaries ------------- ### Admin * Quiz 1 to be returned tomorrow. * A lot of snow is scheduled within the next day. Please be careful. * The Registrar wants me to remind you that Add/Drop deadline is Friday. * Enjoy caucusing (or watching the Caucuses) tonight! * Email policies * When you send me email asking questions, it helps if you title it something like "HELP" or "QUESTION". (Yes, all caps is okay.) * I tend to respond to email promptly, but I get a lot of email. If I haven't responded to email within 24 hours, send me a reminder. * Yes, I know that I have to work on the formatting of today's lab. ### Reminders * Office hours: MTWF 10-11, Tu 1-2. * Sign up at . * Also feel free to stop by when my door is open. * Or to email me for an appointment. * Tutor hours * Sunday, 3-5 p.m. * Sunday-Thursday, 7-10 p.m. * Weekly review sessions: * Wednesday at 8pm in the CS Commons with Sarah * Thursday at 10am in this room with SamR * Thursday at 8pm in the CS Commons with Kumar ### Upcoming Work: * Reading for Tuesday: [Transforming RGB Colors](../readings/transforming-rgb-early-reading.html) * [Assignment 2](../assignments/assignment.02.html) due TOMORROW! at 10:30 p.m. * Lab Writeup: Exercise 9 * Send email titled __CSC 151 Lab Writeup 5 (Your Names)__ * Do not include the underscores. * Send to * Due before class on Wednesday. ### Extra Credit #### Academic * CS Table, Tuesday, Noon, White PDR: Facebook's Walled Internet. (Readings to be distributed via email.) * Community Conversations on Race, 7:30 p.m., Tuesday, February 2, Lazier 3rd Floor Lounge * CS Extra on Thursday: LaTeX (4:15 p.m., 3813) #### Peer * Track and Field Grinnell Invite February 6. (30 min suffices) * Swimming February 6 vs. UN and IAState, starts at 1pm. (30 min suffices) #### Miscellaneous * Caucus TONIGHT. (Or observe a Caucus.) ### Questions from Sam _What does `round` do?_ ### Questions from Students _How do we submit extra credit._ > Send a message titled something like "CSC 151 Extra Credit (Your Name)" to . > The message should be your *reflections* on the talk or activity. I don't really need summaries. > You should strive to do this within two days of the event. _When we rewrite the algorithm, should it just return yes/no or should it give a count of matching birthdays?_ > You only need to give yes/no, but a count would be cool, too. > However, you should be careful. I've seen algorithms that give the wrong count if three people have the same birthday. _Do you want us to base our algorithm off of the bad one that was there, or should we start from scratch?_ > Either. _What are the odds that I ended up with the same partner?_ > The odds that someone ends up with the same partner are reasonably good. _GIMP and DrRacket aren't playing nice. Why?_ > Sam is not necessarily competent. But we'll try to fix it today. _Are mentor sessions in the commons?_ > Yes. _Where is the commons?_ > We think it's Science 3817. It's the big room that overlooks Kistle. Lab --- _I'm getting an error message that says "DBus not working!"_ > Go to GIMP and under the **Mediascript Menu** select **Start DBus Server** _The color swatch isn't showing up_ > Try `(image-show (color-swatch (irgb 255 0 0)))` _I'm getting an error message at the bottom that says "default-load-extension-handler ..."_ > *Ignore it* Sam is not competent. He has no idea what it's happening and can't fix it. Lab writeup: Exercise 9 Debrief ------- Things that I hope you thought about ... * How (and why) to write nested Scheme expressions. `(image-show (color-swatch (irgb 200 100 200)))` * Different ways of thinking about colors (names, three components, etc.) (None of these things are colors.) * How you will keep track of the vocabulary.