undefined outcome with spread operator

Question

What am I doing wrong in my little code snippet that I get undefined instead of number outcome?

function multiply(multiplier: number, ...args: [number, number, number]) {
    return args.map(
        element => { multiplier * element; }
    );
}

console.log(multiply(2, 5,6,7));

output: [ undefined, undefined, undefined ]

Answer 1

感谢mplungjan的评论，我意识到我应该修改我的map功能的内容如下：

element => { return multiplier * element; }