访问嵌套的JSON数组

{
  "users": [
    {
      "name": "Alice",
      "age": 25
    },
    {
      "name": "Bob",
      "age": 30
    }
  ]
}

[
  {
    "name": "Apple",
    "color": "red"
  },
  {
    "name": "Banana",
    "color": "yellow"
  }
]

data.forEach(function(fruit) {
  console.log(fruit.name);
  console.log(fruit.color);
});

{
  "categories": [
    {
      "name": "Fruits",
      "items": [
        {
          "name": "Apple",
          "color": "red"
        },
        {
          "name": "Banana",
          "color": "yellow"
        }
      ]
    },
    {
      "name": "Vegetables",
      "items": [
        {
          "name": "Carrot",
          "color": "orange"
        },
        {
          "name": "Broccoli",
          "color": "green"
        }
      ]
    }
  ]
}

function getFruitNames(categories) {
  categories.forEach(function(category) {
    if (category.items) {
      category.items.forEach(function(fruit) {
        console.log(fruit.name);
      });
    }
  });
}

getFruitNames(data.categories);