如何将Javascript映射函数与对象文字一起使用？

Question

I'm having a problem writing some Javascript code. I'm trying to use the map function to create a new array. Here's my code:

[1,2,3].map(m => {'id': m})

I expected that the result would be:

[
    {'id': 1},
    {'id': 2},
    {'id': 3}
]

Instead, I get an error that says "Uncaught SyntaxError: Unexpected token :"

Can someone tell me what I'm doing wrong?

Answer 1

The lambda thinks your object is a function body.

[1,2,3].map(m => ({'id': m}))

Adding some extra brackets will tell it it's an object literal.