json树形查找

function findInJSON(jsonObj, keyToFind) {
    for (let key in jsonObj) {
        if (key === keyToFind) {
            return jsonObj[key];
        }
        if (typeof jsonObj[key] === 'object') {
            let result = findInJSON(jsonObj[key], keyToFind);
            if (result !== undefined) {
                return result;
            }
        }
    }
    return undefined;
}

// 使用示例
let data = {
    "users": [
        {"name": "Alice", "age": 30},
        {"name": "Bob", "age": 25}
    ],
    "info": {"location": "New York"}
};

console.log(findInJSON(data, 'location')); // 输出: New York

function findInJSONIterative(jsonObj, keyToFind) {
    let stack = [jsonObj];
    while (stack.length > 0) {
        let current = stack.pop();
        for (let key in current) {
            if (key === keyToFind) {
                return current[key];
            }
            if (typeof current[key] === 'object') {
                stack.push(current[key]);
            }
        }
    }
    return undefined;
}

// 使用示例
console.log(findInJSONIterative(data, 'location')); // 输出: New York