SOURCE

const fields = [
    [
        {
            username: '姓名',
            password: '密码',
        },
        false
    ],
    [
        {
            personData: '个人信息',
            age: '年龄',
        },
        {
            work: '工作',
            address: '地址',
        },
        null,
        ''
    ]
]
const a = fields.map(v => v.filter(Boolean))
console.log(a)