In this exercise, your job is to get Karel to create a checkerboard pattern of beepers inside an empty rectangular world, as illustrated in the following before-and-after diagram: cs106 – assignment #1 – task #3 – 8×8
This problem has a nice decomposition structure along with some interesting algorithmic issues. As you think about how you will solve the problem, you should make sure that your solution works with checkerboards that are different in size from the standard 8×8 checkerboard shown in the example. Odd-sized checkerboards are tricky, and you should make sure that your program generates the following pattern in a 5×3 world: cs106 – assignment #1 – task #3 – 5×3
Another special case you need to consider is that of a world which is only one column wide or one row high. The starter folder contains several sample worlds that test these special cases, and you should make sure that your program works for each of them.
Karel has been hired to repair the damage done to the Quad in the 1989 earthquake. In particular, Karel is to repair a set of arches where some of the stones (represented by beepers, of course) are missing from the columns supporting the arches, as follows: cs106 – assignment #1 – task #2 – start Continue reading “cs106a – Assignment #1 – Task #2”
Your first task is to solve a simple story-problem in Karel’s world. Suppose that Karel has settled into its house, which is the square area in the center of the following diagram:
Please note, this blog entry is from a previous course. You might want to check out the current one.
Allow users to reorder their itinerary for their vacation. To do this, you might want to think about creating a top-level Entity (Itinerary) in your schema and using an “ordered to-many relationship” to store the places in the itinerary. An “ordered to-many relationship” appears in your code as an NSOrderedSet (instead of an NSSet). The table view that shows the places in the itinerary will have to be rewritten to display this NSOrderedSet of places (it won’t be able to be an NSFetchedResultsController-based table view) and you will have to figure out how to use UITableView API to edit an NSMutableOrderedSet. Warning: while this is not that difficult to implement coding- wise, it requires quite a bit of investigation to figure out. Another approach is to add an attribute in your schema that determines the order (but this can be a little bit clunky). The former approach will probably lead to more learning opportunities.
Following the instructions from above create a new Entity called “Itinerary” for the Core Data Model with a ordered one-to-many relationship called “places” on the Itinerary side and “itinerary” on the place side. Recreate all NSManagedObject subclasses and add a category for the Itinerary class. Continue reading “Assignment #6 Extra Task #2”
Please note, this blog entry is from a previous course. You might want to check out the current one.
Add UI to allow the user to add new vacation documents and to pick which vacation they are visiting when they choose the Visit button.
For the first part of this task add a new view controller to both storyboards and setup a new subclass of the UIViewController class. Add a bar button item to the navigation item of the vacations table view controller with a push segue for the iPhone and a popover segue for the iPad from this new button to the new view controller. Add a text field with an outlet and a button with an action to the view controller.
To be able to close the popover controller after the button has been pressed, it is necessary to delegate this to the vacations view controller because it also creates the popover. Thus we add a protocol for the delegate: Continue reading “Assignment #6 Extra Task #1”
