refactor: simplify repeatStr function using built-in string method

Author: Grajales-K

Sprint-3/2-practice-tdd/repeat-str.js

@@ -1,15 +1,29 @@
+// function repeatStr(str, count) {
+//   if (count < 0) {
+//     throw new Error("count cannot be negative");
+//   }
+
+//   let result = "";
+//   for (let i = 0; i < count; i++) {
+//     result = result + str;
+//   }
+//   return result;
+// }
+
+// The repeat() method of String values constructs and returns 
+// a new string which contains the specified number of copies 
+// of this string, concatenated together.
+//repeatStr("abc", 3); // "abcabcabc" 
+
+//refactored function using built-in method
 function repeatStr(str, count) {
   if (count < 0) {
-    throw new Error("count cannot be negative 😭");
+    throw new Error("count cannot be negative");
   }
-
-  let result = "";
-  for (let i = 0; i < count; i++) {
-    result = result + str;
-  }
-  return result;
+  return str.repeat(count);
 }
 
+
 module.exports = repeatStr;
 
 
@@ -23,7 +37,7 @@ test("Should log the specific error message to the console", () => {
     console.log("Verified Error Message ->", error.message);
 
     // Check if the message is exactly what we defined
-    expect(error.message).toBe("count cannot be negative 😭");
+    expect(error.message).toBe("count cannot be negative");
   }
 
   // Also verify that it actually throws using Jest's built-in matcher