Go - closure

 

package mainimport "fmt"func main() {numbers := []int{1, 2, 3}double := createTransformer(2)triple := createTransformer(3)transformed := transformNumbers(&numbers, func(number int) int {return number * 2})doubled := transformNumbers(&numbers, double)tripled := transformNumbers(&numbers, triple)fmt.Println(transformed)fmt.Println(doubled)fmt.Println(tripled)
}func transformNumbers(numbers *[]int, transform func(int) int) []int {dNumbers := []int{}for _, val := range *numbers {dNumbers = append(dNumbers, transform(val))}return dNumbers
}func createTransformer(factor int) func(int) int {return func(number int) int {return number * factor}
}