完善个人练习分享

src/components/ScoreResult.vue

@@ -69,7 +69,7 @@ const arrows = computed(() => {
   return data;
 });
 
-const validArrows = computed(() => arrows.value.filter((a) => !!a.ring));
+const validArrows = computed(() => arrows.value.filter((a) => !!a.ring).length);
 </script>
 
 <template>