新手开发者求助：如何用AWS Lambda函数实现数组答案验证

直接给你清晰的实现思路和代码示例，基于Node.js（Lambda最常用的运行时之一）：

核心逻辑 #

• 按指定顺序（food → snacks → drinks）提取待验证字段
• 对每个字段，检查用户输入的值是否存在于正确答案的对应数组中
• 收集所有检查结果，返回布尔值数组

完整Lambda代码示例 #

exports.handler = async (event) => {
    // 从Lambda事件中获取输入数据（生产环境推荐方式），保留默认值方便测试
    const userInput = event.userInput || {"food":"ribs", "snacks":"doritos", "drinks":"pepsi"};
    const correctAnswers = event.correctAnswers || {
      "answer": {
        "food": ["ribs", "pasta", "ramen"],
        "snacks": ["doritos", "cheetos", "popcorn"],
        "drinks": ["orange juice", "apple juice"]
      }
    };
    
    // 固定验证顺序，确保结果顺序符合要求
    const checkFields = ['food', 'snacks', 'drinks'];
    const validationResult = [];
    
    for (const field of checkFields) {
        // 容错处理：字段缺失时默认返回false
        const userValue = userInput[field];
        const validOptions = correctAnswers.answer?.[field] || [];
        
        // 判断值是否在有效数组中，推入结果数组
        validationResult.push(validOptions.includes(userValue));
    }
    
    return {
        statusCode: 200,
        body: JSON.stringify(validationResult)
    };
};

代码说明 #

• 输入灵活性：通过event传递输入数据，避免硬编码，适配不同场景
• 顺序可控：用checkFields数组固定验证顺序，保证结果为[true, true, false]
• 容错机制：用可选链?.和默认值，防止因字段缺失导致函数报错
• 简洁验证：利用数组includes()方法直接完成存在性判断，逻辑清晰

测试方法 #

在Lambda控制台的测试事件中传入如下JSON，执行后即可得到目标结果：

{
  "userInput": {"food":"ribs", "snacks":"doritos", "drinks":"pepsi"},
  "correctAnswers": {
    "answer": {
      "food": ["ribs", "pasta", "ramen"],
      "snacks": ["doritos", "cheetos", "popcorn"],
      "drinks": ["orange juice", "apple juice"]
    }
  }
}

内容的提问来源于stack exchange，提问作者PhuongHoang6897