如何按指定格式在TypeScript中打印多级对象shop_items

完整实现代码 #

先补全必要的类型定义，再编写打印逻辑：

type InventoryItem = Record<string, string>;
type Inventory = {
  Toys: {
    Balls: InventoryItem;
  };
  Books: Record<string, InventoryItem>;
};

export const shop_items: Inventory = {
    Toys: {
        Balls: {
            BallId: '001uy',
            BallName: 'Soccerball',
            SignedBy: 'David_Beckham',
        },
    },
    Books:{
        Novel: {
            BookId: '001fd',
            BookName: 'Beauty and the beast',  
        },
        Puzzle: {
            BookId: '002sz',
            BookName: 'Sherlock Holmes',  
        },
        Sci-fi: {
            BookId: '003tr',
            BookName: 'Dr.Gadget',  
        },
    }
};

function printShopItems(items: Inventory) {
  // 处理Toys模块，直接打印键值对
  const toysBalls = items.Toys.Balls;
  for (const [key, value] of Object.entries(toysBalls)) {
    console.log(`${key} : ${value}`);
  }
  console.log(''); // 空行分隔两部分内容

  // 处理Books模块，按路径格式打印BookId
  for (const [category, bookInfo] of Object.entries(items.Books)) {
    console.log(`/Books/${category}/BookId : ${bookInfo.BookId}`);
  }
}

// 执行打印
printShopItems(shop_items);

逻辑说明 #

1. Toys部分处理：直接遍历Toys.Balls的所有键值对，按键 : 值格式输出
2. Books部分处理：遍历Books下的每个分类，拼接路径字符串/Books/[分类名]/BookId，对应输出该分类的BookId值
3. 用空行分隔两部分输出内容，匹配期望格式

运行输出 #

执行代码后，控制台将输出：

BallId : 001uy
BallName : Soccerball
SignedBy : David_Beckham

/Books/Novel/BookId : 001fd
/Books/Puzzle/BookId : 002sz
/Books/Sci-fi/BookId : 003tr

内容的提问来源于stack exchange，提问作者ShanWave007