From 66e8f9ccbd9d279dd4c09ad0a77620b5468ed43d Mon Sep 17 00:00:00 2001
From: Oleksii Andriushyn <andriushyn.aleks@gmail.com>
Date: Fri, 4 Aug 2023 00:05:15 +0300
Subject: [PATCH] Solution

---
 src/arrayMethodJoin.js | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/arrayMethodJoin.js b/src/arrayMethodJoin.js
index 3a62201c1..04fd14d9f 100644
--- 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;
   };
 }