Solution

src/arrayMethodSort.js

@@ -4,8 +4,43 @@
  * Implement method Sort
  */
 function applyCustomSort() {
-  [].__proto__.sort2 = function(compareFunction) {
-    // write code here
+  [].__proto__.sort2 = function (compareFunction) {
+    let compareFn = compareFunction;
+    const arr = this;
+    const length = arr.length;
+
+    // Se não houver compareFn, usamos o comportamento padrão
+    if (typeof compareFn !== 'function') {
+      compareFn = function (a, b) {
+        const strA = String(a);
+        const strB = String(b);
+
+        if (strA < strB) {
+          return -1;
+        }
+
+        if (strA > strB) {
+          return 1;
+        }
+
+        return 0;
+      };
+    }
+
+    // Bubble Sort
+    for (let i = 0; i < length - 1; i++) {
+      for (let j = 0; j < length - 1 - i; j++) {
+        if (compareFn(arr[j], arr[j + 1]) > 0) {
+          // swap manual
+          const temp = arr[j];
+
+          arr[j] = arr[j + 1];
+          arr[j + 1] = temp;
+        }
+      }
+    }
+
+    return arr;
   };
 }