Enums Exercises

Fork and clone the enums-exercises repository.

$ cd ~/your/project/dir
$ git clone [email protected]:USERNAME/enums-exercises.git
$ cd enums-exercises

Create a branch so that you're not changing master:

$ git checkout -b make-tests-pass

Keeping in sync with the upstream repository

origin is your fork of the project. We'll need to connect to the upstream repository.

To do this, add a new remote named upstream that points to the JumpstartLab:

$ git remote add upstream [email protected]:JumpstartLab/enums-exercises.git

Then pull down the updated version of upstream:

$ git fetch upstream

And now make sure you're on master:

$ git checkout master
$ git branch # should say *master

Make master point to the exact commit that upstream/master is pointing at:

$ git reset --hard upstream/master

Basic Concepts

See basic_enums_test.rb -- we will talk about using times and each to loop through a collection.

Using Each

Use each to get all of the tests passing in:

• transform_collections_test.rb
• pick_desired_values_test.rb
• filter_unwanted_values_test.rb
• are_there_any_test.rb
• are_they_all_test.rb
• find_first_one_test.rb

Commit your changes:

$ git diff # to look at the changes
$ git add -A # to add everything if you like what you see
$ git commit -m "Make tests pass using Enumerable#each"

Create Your Own Adventure

Check out master:

$ git checkout master

Create a new branch:

$ git checkout -b new-exercises

Make up one extra test for each test suite. Remember to delete the implementation once it's passing, and add a skip to it.

$ git diff
$ git add -A
$ git commit -m "Add more exercises"

Push your branch up to GitHub:

$ git push -u origin new-exercises

Submit a pull request (go to the front page of your own enums-exercises repository, there should be a button to compare/create a pull request for the branch that you just pushed up).

Using Other Enumerable Methods

Now go back to your make-tests-pass branch:

$ git checkout make-tests-pass

We will use alternate Enumerable methods to solve the same problems as before:

• map: transform_collections_test.rb
• select: pick_desired_values_test.rb
• reject: filter_unwanted_values_test.rb
• any?: are_there_any_test.rb
• all?: are_they_all_test.rb
• find: find_first_one_test.rb