Learning Functional Programming in Go

The GenerateCars function

Here's the actual generator function:

func (cars Collection) GenerateCars(start, limit int) Collection {       carChannel := make(chan *IndexedCar)

The GenerateCars is another method in the cars collection that makes it easy to compose data transformations with other HOFs. GenerateCars takes a start index and limit, which is the number of cars that we want to be returned. We create carChannel of pointers to IndexedCars:

var waitGroup sync.WaitGroup

We use sync.WaitGroup as a counting semaphore to wait for our collection of Goroutines to finish:

numCarsToGenerate := start + limit - 1generatedCars := Collection{}waitGroup.Add(numCarsToGenerate)

We calculate the number of cars we want to generate and pass that number to the ...