From 00b9cbcfacd92ffc138c45d953101b9d9c32f1cb Mon Sep 17 00:00:00 2001
From: Oleh <oleh.matvienko@work.gmail.com>
Date: Thu, 17 Aug 2023 00:15:04 +0300
Subject: [PATCH 1/3] solution

---
 src/arrayMethodJoin.js | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/arrayMethodJoin.js b/src/arrayMethodJoin.js
index 3a62201c..9048b32a 100644
--- a/src/arrayMethodJoin.js
+++ b/src/arrayMethodJoin.js
@@ -4,8 +4,20 @@
  * Implement method join
  */
 function applyCustomJoin() {
-  [].__proto__.join2 = function(separator) {
-    // write code here
+  [].__proto__.join2 = function(separator = ',') {
+    let resultString = '';
+
+    for (let i = 0; i < this.length; i++) {
+      if (this[i] !== null && this[i] !== undefined) {
+        resultString += this[i];
+      }
+
+      if (i !== this.length - 1) {
+        resultString += separator;
+      }
+    }
+
+    return resultString;
   };
 }
 

From c2f7a7512f14dfc895659186124bad2017f89dfd Mon Sep 17 00:00:00 2001
From: Oleh <oleh.matvienko@work.gmail.com>
Date: Thu, 17 Aug 2023 13:16:45 +0300
Subject: [PATCH 2/3] fix some moments

---
 src/arrayMethodJoin.js | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/arrayMethodJoin.js b/src/arrayMethodJoin.js
index 9048b32a..fd824aab 100644
--- a/src/arrayMethodJoin.js
+++ b/src/arrayMethodJoin.js
@@ -5,19 +5,22 @@
  */
 function applyCustomJoin() {
   [].__proto__.join2 = function(separator = ',') {
-    let resultString = '';
+    let joinedString = '';
+    let value = [];
 
     for (let i = 0; i < this.length; i++) {
-      if (this[i] !== null && this[i] !== undefined) {
-        resultString += this[i];
+      value = this[i];
+
+      if (value !== null && value !== undefined) {
+        joinedString += value;
       }
 
       if (i !== this.length - 1) {
-        resultString += separator;
+        joinedString += separator;
       }
     }
 
-    return resultString;
+    return joinedString;
   };
 }
 

From d3cb436f4cd5a3fa6c27d9b0ac102cb9f5e87a21 Mon Sep 17 00:00:00 2001
From: Oleh <oleh.matvienko@work.gmail.com>
Date: Thu, 17 Aug 2023 22:34:05 +0300
Subject: [PATCH 3/3] some improvements

---
 src/arrayMethodJoin.js | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/arrayMethodJoin.js b/src/arrayMethodJoin.js
index fd824aab..bd986ebd 100644
--- a/src/arrayMethodJoin.js
+++ b/src/arrayMethodJoin.js
@@ -6,13 +6,12 @@
 function applyCustomJoin() {
   [].__proto__.join2 = function(separator = ',') {
     let joinedString = '';
-    let value = [];
 
     for (let i = 0; i < this.length; i++) {
-      value = this[i];
+      const valueOfArray = this[i];
 
-      if (value !== null && value !== undefined) {
-        joinedString += value;
+      if (valueOfArray !== null && valueOfArray !== undefined) {
+        joinedString += valueOfArray;
       }
 
       if (i !== this.length - 1) {