package utils

func Map[S, T any](source []S, f func(S) T) []T {
	dest := make([]T, len(source))
	for i, elem := range source {
		dest[i] = f(elem)
	}
	return dest
}

func Reduce[S, T any](source []S, initialValue T, f func(T, S) T) T {
	acc := initialValue
	for _, elem := range source {
		acc = f(acc, elem)
	}
	return acc
}

func Filter[T any](source []T, f func(T) bool) []T {
	var dest []T
	for _, elem := range source {
		if f(elem) {
			dest = append(dest, elem)
		}
	}
	return dest
}