ts一个元组既有数字也有字符串该怎么表示？

Question

const hello : [number, string] = [1, '2', '2', 1]
console.log(hello)

这个虽然可以实现，但是却固定了顺序，假如一个元组既有数字也有字符串顺序和长度也不确定该如何表示？

const a: [number, string, number, string] = [1,'2',3, '4']
const getHello = () => {
    let b = []
    for (let i = 0; i < Math.floor(Math.random()*6); i++) {
        b.push(a[Math.floor(Math.random()*4)])
    }
    return b
}

console.log(getHello())

Answer 1

顺序和长度都不固定那叫啥元组（Tuple）？那不就是数组（Array）么？

看官方定义：

Tuple types allow you to express an array with a fixed number of elements whose types are known, but need not be the same. For example, you may want to represent a value as a pair of a string and a number:

Answer 2

type ArrayA = Array<string | number>

Answer 3

const a: [number|string, number|string,number|string,number|string] = ['1','2',3, '4']