package lambda

func Map[T any](xs []T, fx func(T) T) []T {
	for i, v := range xs {
		xs[i] = fx(v)
	}
	return xs
}

func MapV[T, V any](xs []T, fx func(T) V) (ov []V) {
	ov = make([]V, len(xs))
	for i, v := range xs {
		ov[i] = fx(v)
	}
	return
}

func MapError[T any](xs []T, fx func(T) (T, error)) (ov []T, oe []error) {
	oe = make([]error, len(xs))
	for i, v := range xs {
		xs[i], oe[i] = fx(v)
	}
	return
}

func MapErrorV[T, V any](xs []T, fx func(T) (V, error)) (ov []V, oe []error) {
	ov = make([]V, len(xs))
	oe = make([]error, len(xs))
	for i, v := range xs {
		ov[i], oe[i] = fx(v)
	}
	return
}