javascript - 过滤对象数组返回空数组

Question

我有以下对象数组:

arr = [
    {
        name: "john",
        age: 24,
        gender: "male"
    },
    {
        name: "jane",
        age: 27,
        gender: "female"
    },
    {
        name: "joe",
        age: 29,
        gender: "male"
    }
]

我正在尝试将 name 和 age 属性过滤到新数组中。我试过这个:

const newFields = arr.filter((item) => {
    return (
        item.name && item.age
    );
});

但由于某种原因 newFields 返回一个空数组。

Answer 1

而不是 .filter()使用.map()

const arr = [
  {
    name: "john",
    age: 24,
    gender: "male"
  },
  {
    name: "jane",
    age: 27,
    gender: "female"
  },
  {
    name: "joe",
    age: 29,
    gender: "male"
  }
];

const newFields = arr.map(item => {
  return {
      name: item.name,
      age: item.age
    }
});
console.log(newFields)