package iter

func ForEach[V any](action func(v V), iter Iter[V]) {
	for {
		if v, ok := iter(); ok {
			action(v)
		} else {
			return
		}
	}
}

func Reduce[V, R any](reducer func(cur R, v V) R, init R, iter Iter[V]) R {
	for {
		if v, ok := iter(); ok {
			init = reducer(init, v)
		} else {
			return init
		}
	}
}

func Collect[V any](iter Iter[V]) (vs []V) {
	for {
		if v, ok := iter(); ok {
			vs = append(vs, v)
		} else {
			return
		}
	}
}

func Count[V any](iter Iter[V]) (count int) {
	for {
		if _, ok := iter(); ok {
			count++
		} else {
			return
		}
	}
}