[O] Optimize unread count with caching

2019-10-05 13:36:56 -04:00
parent 0f6f27aa15
commit 48fb8c7d4c
1 changed files with 8 additions and 2 deletions
@@ -10,11 +10,17 @@ export default class OverallCourse extends Vue
    // @ts-ignore
    @Prop({required: true}) course: Course;

+    private unread: number = -1;
+
    /**
-     * Count the number of unread assignments
+     * Count the number of unread assignments with cache
     */
    countUnread(): number
    {
-        return this.course.assignments.filter(a => a.unread).length;
+        if (this.unread == -1)
+        {
+            return this.unread = this.course.assignments.filter(a => a.unread).length;
+        }
+        else return this.unread;
    }
 }