Solution

mate-academy · Aug 3, 2023 · 66e8f9c · 66e8f9c
1 parent d04c9f0
commit 66e8f9c
Showing 1 changed file with 16 additions and 2 deletions.
diff --git a/src/arrayMethodJoin.js b/src/arrayMethodJoin.js
@@ -4,8 +4,22 @@
  * Implement method join
  */
 function applyCustomJoin() {
-  [].__proto__.join2 = function(separator) {
-    // write code here
+  [].__proto__.join2 = function(separator = ',') {
+    let stringFromJoinedArray = '';
+
+    for (let i = 0; i < this.length; i++) {
+      const itemContent
+        = this[i] === null || this[i] === undefined
+          ? ''
+          : this[i];
+
+      stringFromJoinedArray
+        += i === 0
+          ? itemContent
+          : `${separator}` + itemContent;
+    }
+
+    return stringFromJoinedArray;
   };
 }