SOURCE

const a = [
    {
        name: '小胡',
        age: 20,
        sex: 0,
        hobbie: ['篮球', '足球']
    },
    {
        name: '小李',
        age: 19,
        sex: 1,
        hobbie: ['篮球']
    },
    {
        name: '小wang',
        age: 39,
        sex: 0,
        hobbie: ['足球']
    },
]
a.sort(function (a, b) { return b.age - a.age })
// const b = a.map((item, index, arr) => {
//     item.age += 10
//     return item
// })
console.log(a)