Use instanceof instead of Duck typing

blend · Jun 27, 2020 · b340a71 · b340a71
1 parent f314751
commit b340a71
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/map.ts b/src/map.ts
@@ -73,7 +73,7 @@ export async function mapLimit<V>(input: any, limit: number, iteratee: any): Pro
     return [];
   }
 
-  const isArray = input.length !== undefined;
+  const isArray = input instanceof Array;
   const size = (() => {
     if (isArray) {
       return input.length;