diff --git a/map.go b/map.go
index 562fae4..c72559b 100644
--- a/map.go
+++ b/map.go
@@ -7,27 +7,27 @@ func Map[T any](xs []T, fx func(T) T) []T {
 	return xs
 }
 
-func MapV[T, V any](xs []T, fx func(T) V) (ov []V) {
-	ov = make([]V, len(xs))
+func MapV[T, V any](xs []T, fx func(T) V) []V {
+	ov := make([]V, len(xs))
 	for i, v := range xs {
 		ov[i] = fx(v)
 	}
-	return
+	return ov
 }
 
-func MapError[T any](xs []T, fx func(T) (T, error)) (ov []T, oe []error) {
-	oe = make([]error, len(xs))
+func MapError[T any](xs []T, fx func(T) (T, error)) ([]T, []error) {
+	oe := make([]error, len(xs))
 	for i, v := range xs {
 		xs[i], oe[i] = fx(v)
 	}
-	return
+	return xs, oe
 }
 
-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))
+func MapErrorV[T, V any](xs []T, fx func(T) (V, error)) ([]V, []error) {
+	ov := make([]V, len(xs))
+	oe := make([]error, len(xs))
 	for i, v := range xs {
 		ov[i], oe[i] = fx(v)
 	}
-	return
+	return ov, oe
 }