如何通过在路径上迭代来访问和编辑对象值？

const obj = {
  person: {
    name: "Alice",
    age: 30,
    address: {
      street: "123 Main St",
      city: "New York"
    }
  }
};

// 递归方式
function getObjectValueRecursive(obj, path) {
  const levels = path.split('.');
  const currentLevel = levels.shift();

  if (levels.length === 0) {
    return obj[currentLevel];
  }

  if (!obj.hasOwnProperty(currentLevel)) {
    obj[currentLevel] = {};
  }

  return getObjectValueRecursive(obj[currentLevel], levels.join('.'));
}

function setObjectValueRecursive(obj, path, value) {
  const levels = path.split('.');
  const currentLevel = levels.shift();

  if (levels.length === 0) {
    obj[currentLevel] = value;
    return;
  }

  if (!obj.hasOwnProperty(currentLevel)) {
    obj[currentLevel] = {};
  }

  setObjectValueRecursive(obj[currentLevel], levels.join('.'), value);
}

// 循环迭代方式
function getObjectValueIterative(obj, path) {
  const levels = path.split('.');
  let currentObj = obj;

  for (let i = 0; i < levels.length; i++) {
    const currentLevel = levels[i];

    if (i === levels.length - 1) {
      return currentObj[currentLevel];
    }

    if (!currentObj.hasOwnProperty(currentLevel)) {
      currentObj[currentLevel] = {};
    }

    currentObj = currentObj[currentLevel];
  }
}

function setObjectValueIterative(obj, path, value) {
  const levels = path.split('.');
  let currentObj = obj;

  for (let i = 0; i < levels.length; i++) {
    const currentLevel = levels[i];

    if (i === levels.length - 1) {
      currentObj[currentLevel] = value;
      return;
    }

    if (!currentObj.hasOwnProperty(currentLevel)) {
      currentObj[currentLevel] = {};
    }

    currentObj = currentObj[currentLevel];
  }
}

console.log(getObjectValueRecursive(obj, "person.name")); // 输出: "Alice"
console.log(getObjectValueRecursive(obj, "person.address.city")); // 输出: "New York"

setObjectValueRecursive(obj, "person.name", "Bob");
console.log(obj.person.name); // 输出: "Bob"

console.log(getObjectValueIterative(obj, "person.name")); // 输出: "Bob"
console.log(getObjectValueIterative(obj, "person.address.city")); // 输出: "New York"

setObjectValueIterative(obj, "person.name", "Charlie");
console.log(obj.person.name); // 输出: "Charlie"