The goal of trainr is to provide an interactive R learning experience, inspired by the Ruby Koans and the idea of using Test-Driven Development (and the Red -> Green -> Refactor) as a teaching tool.
- You can install the current version from GitHub using
devtools::install_github("ericwburden/trainr"). - Once installed, you can create a
trainrproject using the RStudio 'New Project...' dialog ("Learn R Using trainr" will be in the 'Project Type' list). That project will open to thecurrent_exercise.Rfile containing your first learning challenge. - When you think you've got it right, choose "TRAINR - Check Exercise" from the
'Addins' menu (or run
trainr::check_current_exercise()) to check your answer. - If you've got it right, choosing "TRAINR - Next Exercise" (or
trainr::next_exercise()) will take you to the next exercise.
trainr keeps track of completed exercises on a per-project level, so if you
create a new project, that project starts at the beginning.
Extending trainr is super simple. Just fork the GitHub repository and add your
challenges to the inst/lessons folder, with the
inst/lessons/chapter-<00>/lesson-<00>/<00>-exercise-name.R pattern. Anywhere
in your script that you'd like a user to enter their own code, simply use the
`?` token. Make sure to include tests for your code, and you're all
done. Build your package, and whenever a user opens a trainr project folder
with your package installed, the new exercises will be added to their list for
completion.