Getting started

Unzip it in your CS340 directory, e.g.

cd CS340
unzip cs340-lab12.zip

Open src/cs340_lab12/core.clj in an editor (e.g., Kate) or import it into Eclipse as follows:

File → New → Project… → General → Project
Enter cs340-lab12 as the project name
Uncheck “Use default location”, click Browse, then choose the cs340-lab12 directory
Click Finish

You should see a project called cs340-lab12 in your workspace. You can now open src/cs340_lab12/core.clj. (Note that these steps will only work if you have Counterclockwise installed.)

If you do not see Leiningen dependencies in your cs340-lab12 project, right-click on the project and choose Configure → Convert to Leiningen project. If the project is not configured as a Leiningen project, you won’t be able to start a REPL from within Eclipse.

Your task

Your task is to implement each of the following functions:

check-x
check-o
make-check-fn
get-row
get-col

Each function has a detailed comment indicating the parameter(s) the function takes and what value should be returned, along with example invocations and expected results.

Run the lein test command to run the unit tests. You can see the code for the unit tests in the file test/cs340_lab12/core_test.clj.

Hints

You may find the mapv function to be useful in implementing get-col.

make-check-fn is a higher-order function (a function which returns a function). Make sure you understand what the examples shown in the comment are doing.

If you get all of the functions working, examine the is-win? function. See if you can improve it.

Solution

When you are done, you can compare your solution to mine:

cs340-lab12-solution.zip