new class js -advanced

02_advanced/MATERIAL/advanced-js/lesson_02/solutions/sumNestedArray/index.js

@@ -0,0 +1,26 @@
+function sumNestedArray(arr) {
+  // Base case: when the array is empty, return 0
+  if (arr.length === 0) {
+    return 0;
+  }
+
+  let sum = 0;
+
+  for (let element of arr) {
+    if (Array.isArray(element)) {
+      // Recursive case: if the element is an array, sum its elements
+      sum += sumNestedArray(element);
+    } else if (typeof element === 'number') {
+      sum += element;
+    }
+  }
+
+  return sum;
+}
+
+// Test cases
+console.log(sumNestedArray([1, [2, [3, 4], 5], 6])); // => 21
+console.log(sumNestedArray([[[[1]]], 2, [3, [4, [5]]]])); // => 15
+console.log(sumNestedArray([])); // => 0
+console.log(sumNestedArray([10, [20, [30, [40]]]])); // => 100
+console.log(sumNestedArray([1, 'a', [2, 'b', [3, 4]], 5])); // => 15 (ignores non-numbers)