bootdotdev-fcc-learn-golang-assets/course/10-advanced_functions/exercises/6a-clousures_quiz/readme.md

Closure Review

A closure is a function that references variables from outside its own function body. The function may access and assign to the referenced variables.

Example Closure

func concatter() func(string) string {
	doc := ""
	return func(word string) string {
		doc += word + " "
		return doc
	}
}

func main() {
	harryPotterAggregator := concatter()
	harryPotterAggregator("Mr.")
	harryPotterAggregator("and")
	harryPotterAggregator("Mrs.")
	harryPotterAggregator("Dursley")
	harryPotterAggregator("of")
	harryPotterAggregator("number")
	harryPotterAggregator("four,")
	harryPotterAggregator("Privet")

	fmt.Println(harryPotterAggregator("Drive"))
	// Mr. and Mrs. Dursley of number four, Privet Drive
}