Solution

src/arrayMethodSort.js

@@ -4,9 +4,53 @@
  * Implement method Sort
  */
 function applyCustomSort() {
-  [].__proto__.sort2 = function(compareFunction) {
-    // write code here
+  [].__proto__.sort2 = function (compareFunction) {
+    if (this == null) {
+      throw new TypeError('Cannot convert undefined or null to object');
+    }
+
+    const arr = Object(this);
+    const length = Number(arr.length) >>> 0;
+
+    if (
+      compareFunction !== undefined &&
+      typeof compareFunction !== 'function'
+    ) {
+      throw new TypeError(
+        'The comparison function must be either a function or undefined',
+      );
+    }
+
+    const compare =
+      compareFunction ||
+      ((a, b) => {
+        const strA = String(a);
+        const strB = String(b);
+
+        if (strA > strB) {
+          return 1;
+        }
+
+        if (strA < strB) {
+          return -1;
+        }
+
+        return 0;
+      });
+
+    for (let i = 0; i < length - 1; i++) {
+      for (let j = 0; j < length - 1 - i; j++) {
+        if (compare(arr[j], arr[j + 1]) > 0) {
+          // міняємо місцями
+          const temp = arr[j];
+
+          arr[j] = arr[j + 1];
+          arr[j + 1] = temp;
+        }
+      }
+    }
+
+    return arr;
   };
 }
-
 module.exports = applyCustomSort;