Getting started

Download cs340-lab11.zip.

Unzip it in your CS340 directory, e.g.

cd CS340
unzip cs340-lab11.zip

Open src/cs340_lab11/core.clj in an editor (e.g., Kate) or import it into Eclipse as follows:

  1. File → New → Project… → General → Project
  2. Enter cs340-lab11 as the project name
  3. Uncheck “Use default location”, click Browse, then choose the cs340-lab11 directory
  4. Click Finish

You should see a project called cs340-lab11 in your workspace. You can now open src/cs340_lab11/core.clj. (Note that these steps will only work if you have Counterclockwise installed.)

Your task

Your task is to implement each of the following functions:

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_lab11/core_test.clj.

Hints

You don’t need to do the functions in order (other than that you will want to implement tally-item before invoice-total.)

You may find that destructuring is helpful for tally-item, swapsies, and mulv3.

Solution

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

cs340-lab11-solution.zip