CSC151.01 2015F, Class 16: Homogeneous Lists: Making and Manipulating Groups of Drawings ========================================================================================= _Overview_ * Preliminaries. * Admin. * Upcoming Work. * Extra Credit. * Questions. * Prebrief * Lab Preliminaries ------------- ### Admin * New partners! You know the drill. * Trade: Cover sheet for Candy * Review sessions: * Wednesday, 8pm (Zachary) * Thursday, 10am (Sam) * Thursday, 8pm (Caleb) * Quiz Topics * Boolean Values * Drawings as Values * Testing! * It doesn't look like people are using the printed labs/readings, so I'm giving up on them for now. If you need one today, let me know and I'll print one at the start of class. * Folks are trying to handle the printer problems. * HW 4 is not quite ready. Expect it to be distributed tonight. ### Upcoming Work * Readings for Friday [The GNU Image Manipulation Program](../readings/gimp-reading.html) and [Programming the GIMP tools](../readings/gimp-tools-reading.html) * Exam 1 * Cover sheet due now! * Epilogue due TONIGHT * HW 3 to be distributed later. * Today's Lab writeup (due before class Monday) * Email to * Subject: _CSC 151 Lab Writeup Class 16 (Your Names)_ * Exercise: ### Extra Credit Opportunities #### Academic * Any visit to the current show in the Faulconer gallery * No CS Table this week - It's advising week! * Wednesday CS Extra this week, 4:15 in 3821: Ursula Wolz on Building Coding Communities * Thursday CS Extra this Week, 4:15 in 3821: SamR on The Architecture of Mediascript #### Peer Support * Pals of PALS, pals@grinnell.edu, normally Saturday at 7:45 am (breakfast included), Sunday at 4:45, and Mondays at 4:45. Requires sign up in advance. Fundraising activity forthcoming, too! * Pun Club, Saturdays, 4pm, Way over Younker. * Singers concert on Family weekend! Sept. 26, 2pm., Sebring-Lewis * Orchestra concert on Family weekend! Sept. 26, 2pm., Sebring-Lewis * Open mic at Bob's 9pm Thursday * Autumn Festival, Saturday at 6pm at Harris Gym * Eid Dinner Friday night at dinner time. Tickets necessary. Somewhere on campus. They are selling tickets at the tables by the cafeteria. If you would like to go and the cost is difficult for you, ask Sam for the money. ### Non Extra-Credit Activities * EE's show in Smith * Grinnell Homecoming Parade Thursday at 5:30 p.m. - Small town homecoming is an interesting experience that everyone should see once ### Questions What were the important points from yesterday's class? * When you scale, coordinates and sizes both scale. * In some situations, the order of commands matters * `(square (increment 1))` != `(increment (square 1))` * It also matters for drawings some of the time * If you move then scale you get different results than if you scale then move. * However, you can scale horizontally and vertically in either order * MediaScheme has built in shapes that you can maniuplate with various functions. I don't care that I can't spell manipulate. What were the important points that certain students should have taken from today's reading? * We can make lists of values that simplify your life because you can now do the same calculation to each member of the list. * The procedure to make a list is `list` or `make-list`. * The procedure to do something with each element of a list is `map`.