All exercises from the book can be completed either:

• in browser (using the version of the book published on gitbook.io)
• in your editor & terminal, using npm

In every folder named ch** from this exercises/ folder, you'll find three types of files:

• exercises
• solutions
• validations

Exercises are structured with a statement in comment, followed by an incomplete or incorrect function. For example, exercise_a from ch04 looks like this:

// Refactor to remove all arguments by partially applying the function.

// words :: String -> [String]
const words = str => split(' ', str);

Following the statement, your goal is to refactor the given function words. Once done, your proposal can be verified by running:

npm run ch04

Remember to first install node dependencies being at the recommended node version of the project. More on this on the main README of the project.

Alternatively, you can also have a peak at the corresponding solution file: in this case solution_a.js.

The files validation_*.js aren't really part of the exercises but are used internally to verify your proposal and, offer hints when adequate. The curious reader may have a look at them :).

Now go and learn some functional programming λ!

Important notice: the exercise runner takes care of bringing all data-structures and functions from the appendixes into scope. Therefore, you may assume that any function present in the appendix is just available for you to use! Amazing, isn't it?