From 891bae2861043f86b0de4ae13fee0c3bb1b2ab99 Mon Sep 17 00:00:00 2001
From: Serhii Shimko <shimkosergij2010@gmail.com>
Date: Sat, 31 Jan 2026 12:51:50 +0200
Subject: [PATCH 1/3] completed the task

---
 src/arrayMethodSort.js | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/arrayMethodSort.js b/src/arrayMethodSort.js
index 32363d0d..e1b5bef2 100644
--- a/src/arrayMethodSort.js
+++ b/src/arrayMethodSort.js
@@ -4,8 +4,24 @@
  * Implement method Sort
  */
 function applyCustomSort() {
-  [].__proto__.sort2 = function(compareFunction) {
-    // write code here
+  [].__proto__.sort2 = function (compareFunction) {
+    // const newArray = [];
+    let compair = compareFunction;
+
+    if (typeof compair !== 'function') {
+      compair = (a, b) =>
+        String(a) > String(b) ? 1 : String(a) < String(b) ? -1 : 0;
+    }
+
+    for (let i = 0; i < this.length - 1; i++) {
+      for (let j = i + 1; j < this.length; j++) {
+        if (compair(this[i], this[j]) > 0) {
+          [this[i], this[j]] = [this[j], this[i]];
+        }
+      }
+    }
+
+    return this;
   };
 }
 

From 9a5207f99ad949ed1b90d011014571f147d1344c Mon Sep 17 00:00:00 2001
From: Serhii Shimko <shimkosergij2010@gmail.com>
Date: Sat, 31 Jan 2026 13:21:54 +0200
Subject: [PATCH 2/3] completed the task

---
 src/arrayMethodSort.js | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/src/arrayMethodSort.js b/src/arrayMethodSort.js
index e1b5bef2..3afc7f3c 100644
--- a/src/arrayMethodSort.js
+++ b/src/arrayMethodSort.js
@@ -6,21 +6,40 @@
 function applyCustomSort() {
   [].__proto__.sort2 = function (compareFunction) {
     // const newArray = [];
-    let compair = compareFunction;
+    let compare = compareFunction;
+    const result = [];
 
-    if (typeof compair !== 'function') {
-      compair = (a, b) =>
+    if (typeof compare !== 'function') {
+      compare = (a, b) =>
         String(a) > String(b) ? 1 : String(a) < String(b) ? -1 : 0;
     }
 
     for (let i = 0; i < this.length - 1; i++) {
       for (let j = i + 1; j < this.length; j++) {
-        if (compair(this[i], this[j]) > 0) {
+        if (this[i] === undefined) {
+          continue;
+        }
+
+        if (this[j] === undefined) {
+          continue;
+        }
+
+        if (compare(this[i], this[j]) > 0) {
           [this[i], this[j]] = [this[j], this[i]];
         }
       }
     }
 
+    for (let i = 0; i < this.length - 1; i++) {
+      if (this[i] !== undefined) {
+        result[result.length] = this[i];
+      }
+    }
+
+    for (let i = 0; i < result.length - 1; i++) {
+      this[i] = result[i];
+    }
+
     return this;
   };
 }

From 27d17d057907b23bec0ebc6e82a98c2cee0219a0 Mon Sep 17 00:00:00 2001
From: Serhii Shimko <shimkosergij2010@gmail.com>
Date: Sat, 31 Jan 2026 13:35:37 +0200
Subject: [PATCH 3/3] completed the task

---
 src/arrayMethodSort.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/arrayMethodSort.js b/src/arrayMethodSort.js
index 3afc7f3c..d04391e8 100644
--- a/src/arrayMethodSort.js
+++ b/src/arrayMethodSort.js
@@ -8,6 +8,7 @@ function applyCustomSort() {
     // const newArray = [];
     let compare = compareFunction;
     const result = [];
+    const undefinedNumber = [];
 
     if (typeof compare !== 'function') {
       compare = (a, b) =>
@@ -30,14 +31,18 @@ function applyCustomSort() {
       }
     }
 
-    for (let i = 0; i < this.length - 1; i++) {
+    for (let i = 0; i < this.length; i++) {
       if (this[i] !== undefined) {
         result[result.length] = this[i];
+      } else {
+        undefinedNumber[undefinedNumber.length] = this[i];
       }
     }
 
-    for (let i = 0; i < result.length - 1; i++) {
-      this[i] = result[i];
+    const sorted = [...result, ...undefinedNumber];
+
+    for (let i = 0; i < sorted.length; i++) {
+      this[i] = sorted[i];
     }
 
     return this;