迭代多维对象/数组

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

const multiDimArray = [1, [2, [3, 4], 5], 6];
iterateMultiDimensionalArray(multiDimArray);

function iterateMultiDimensionalObject(obj) {
  for (let key in obj) {
    if (obj.hasOwnProperty(key)) {
      if (typeof obj[key] === 'object' && obj[key] !== null) {
        iterateMultiDimensionalObject(obj[key]);
      } else {
        console.log(key + ': ' + obj[key]);
      }
    }
  }
}

const multiDimObject = {
  a: 1,
  b: {
    c: 2,
    d: {
      e: 3,
      f: 4
    }
  },
  g: 5
};

iterateMultiDimensionalObject(multiDimObject);