code refactor

Author: Mahiuha

0x03-ES6_data_manipulation/8-clean_set.js

@@ -1,5 +1,10 @@
 export default function cleanSet(set, startString) {
-  const filteredSet = Array.from(set).filter((val) => val.startsWith(startString));
-  const cleanedValues = filteredSet.map((val) => val.substring(startString.length));
-  return cleanedValues.join('-');
+  if (!startString || !startString.length || typeof startString !== 'string') return '';
+
+  let finalString = '';
+  set.forEach((element) => {
+    if (element && element.startsWith(startString)) finalString += `${element.slice(startString.length)}-`;
+  });
+
+  return finalString.slice(0, finalString.length - 1);
 }