用于嵌套数组的Javascript数组重构

let nestedArray = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9]
];

let deepNestedArray = [
  [1, [2, 3]],
  [4, [5, [6, 7]]]
];

function traverseNestedArray(arr) {
  for (let i = 0; i < arr.length; i++) {
    if (Array.isArray(arr[i])) {
      traverseNestedArray(arr[i]);
    } else {
      console.log(arr[i]);
    }
  }
}

let nestedArray = [1, [2, 3], [4, [5, 6]]];
traverseNestedArray(nestedArray);

let nestedArray = [1, [2, 3], [4, [5, 6]]];

// 使用递归
function flattenArray(arr) {
  let result = [];
  for (let i = 0; i < arr.length; i++) {
    if (Array.isArray(arr[i])) {
      result = result.concat(flattenArray(arr[i]));
    } else {
      result.push(arr[i]);
    }
  }
  return result;
}

console.log(flattenArray(nestedArray)); // [1, 2, 3, 4, 5, 6]

// 使用ES6方法
console.log(nestedArray.flat(Infinity)); // [1, 2, 3, 4, 5, 6]