public/subjects/reduceint.en.md

reduceint

Instructions

Write a function called reduceint that simulates the behaviour of reduce from JavaScript.

The function should have as parameters a function, f func(int, int) int and a slice of integers, arr []int. You should apply for each element of the slice the arithmetic function, saving it and printing.

Expected function

func ReduceInt(f func(int, int) int, arr []int) {

}

Usage

Here is a possible program to test your function :

package main

func main() {
	mul := func(acc int, cur int) int {
		return acc * cur
	}
	sum := func(acc int, cur int) int {
		return acc + cur
	}
	div := func(acc int, cur int) int {
		return acc / cur
	}
	as := []int{500, 2}
	ReduceInt(mul, as)
	ReduceInt(sum, as)
	ReduceInt(div, as)
}

And its output :

student@ubuntu:~/[[ROOT]]/test$ go build
student@ubuntu:~/[[ROOT]]/test$ ./test
1000
502
250
student@ubuntu:~/[[ROOT]]/test$