Update index.ts

Author: masx200

design-skiplist/index.ts

@@ -4,27 +4,24 @@ interface Skiplist {
     erase: (num: number) => boolean;
 }
 
-
 function Skiplist(): Skiplist {
     const storage = new Map<number, number>();
 
     function search(target: number): boolean {
-        return storage.has(target)&&(storage.get(target) || 0) > 0;
+        return storage.has(target) && (storage.get(target) || 0) > 0;
     }
 
     function add(num: number): void {
         storage.set(num, 1 + (storage.get(num) || 0));
     }
 
     function erase(num: number): boolean {
+        if (storage.get(num) === 1) {
+            storage.delete(num);
 
-if(storage.get(num)===1){
-storage.delete(num)
-
-return true
-}
+            return true;
+        }
         if (search(num)) {
-
             storage.set(num, -1 + (storage.get(num) || 0));
             return true;
         } else {
@@ -34,4 +31,4 @@ return true
     return { search, add, erase };
 }
 
-export default Skiplist
+export default Skiplist;