Grade School in Elm
Given students' names along with the grade that they are in, create a roster for the school
exercism fetch elm grade-school
Given students' names along with the grade that they are in, create a roster for the school.
In the end, you should be able to:
- Add a student's name to the roster for a grade
- "Add Jim to grade 2."
- Get a list of all students enrolled in a grade
- "Which students are in grade 2?"
- "We've only got Jim just now."
- Get a sorted list of all students in all grades. Grades should sort
as 1, 2, 3, etc., and students within a grade should be sorted
alphabetically by name.
- "Who all is enrolled in school right now?"
- "Grade 1: Anna, Barb, and Charlie. Grade 2: Alex, Peter, and Zoe. Grade 3…"
Note that all our students only have one name. (It's a small town, what do you want?)
For bonus points
Did you get the tests passing and the code clean? If you want to, these are some additional things you could try:
- If you're working in a language with mutable data structures and your implementation allows outside code to mutate the school's internal DB directly, see if you can prevent this. Feel free to introduce additional tests.
Then please share your thoughts in a comment on the submission. Did this experiment make the code better? Worse? Did you learn anything from it?
Refer to the Exercism help page for Elm installation and learning resources.
Writing the Code
The first time you start an exercise, you'll need to ensure you have the appropriate dependencies installed.
$ elm-package install --yes
Execute the tests with:
Automatically run tests again when you save changes:
$ elm-test --watch
As you work your way through the test suite, be sure to remove the
calls from each test until you get them all passing!
A pairing session with Phil Battos at gSchool http://gschool.it
Submitting Incomplete Solutions
It's possible to submit an incomplete solution so you can see how others have completed the exercise.