diff --git a/src/arrayMethodSort.js b/src/arrayMethodSort.js
index 32363d0d..528cdf5d 100644
--- a/src/arrayMethodSort.js
+++ b/src/arrayMethodSort.js
@@ -4,8 +4,26 @@
  * Implement method Sort
  */
 function applyCustomSort() {
-  [].__proto__.sort2 = function(compareFunction) {
-    // write code here
+  [].__proto__.sort2 = function (compareFunction) {
+    let cmp = compareFunction;
+
+    if (typeof cmp !== 'function') {
+      cmp = (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 = 0; j < this.length - 1 - i; j++) {
+        if (cmp(this[j], this[j + 1]) > 0) {
+          const temp = this[j];
+
+          this[j] = this[j + 1];
+          this[j + 1] = temp;
+        }
+      }
+    }
+
+    return this;
   };
 }