js获取list中的对象的属性

const list = [
  { id: 1, name: 'Alice', age: 25 },
  { id: 2, name: 'Bob', age: 30 },
  { id: 3, name: 'Charlie', age: 35 }
];

const firstPerson = list[0];
console.log(firstPerson.name); // 输出: Alice

const propertyName = 'name';
console.log(list[0][propertyName]); // 输出: Alice

const names = list.map(person => person.name);
console.log(names); // 输出: ['Alice', 'Bob', 'Charlie']

list.forEach(person => {
  console.log(person.name);
});
// 输出:
// Alice
// Bob
// Charlie

console.log(list[0].gender); // 输出: undefined

if ('gender' in list[0]) {
  console.log(list[0].gender);
} else {
  console.log('Gender not available');
}

console.log(list[10]); // 抛出错误: Cannot read properties of undefined (reading 'name')

if (list.length > 10) {
  console.log(list[10].name);
} else {
  console.log('Index out of bounds');
}