Golang slice utility functions

slice.go

//Intersection returns the lists of all the elements that are common to both slices.
func Intersection(a, b interface{}) []interface{} {
	set := make([]interface{}, 0)
	hash := make(map[interface{}]bool)
	av := reflect.ValueOf(a)
	bv := reflect.ValueOf(b)

	for i := 0; i < av.Len(); i++ {
		el := av.Index(i).Interface()
		hash[el] = true
	}

	for i := 0; i < bv.Len(); i++ {
		el := bv.Index(i).Interface()
		if _, found := hash[el]; found {
			set = append(set, el)
		}
	}

	return set
}



// Difference returns the lists of all the elements that are in superset but that are not present in subset.
func Difference(superset, subset interface{}) []interface{} {
	set := make([]interface{}, 0)
	hash := make(map[interface{}]bool)

	av := reflect.ValueOf(superset)
	bv := reflect.ValueOf(subset)

	for i := 0; i < bv.Len(); i++ {
		el := bv.Index(i).Interface()
		hash[el] = true
	}

	for i := 0; i < av.Len(); i++ {
		el := av.Index(i).Interface()
		if _, found := hash[el]; !found {
			set = append(set, el)
		}
	}

	return set
}