Only for map

[franciscop]

This is a very nice library. There is a pattern that I think would be awesome if it was supported. For this data definition, common in many situations:

const data = [{ a: 'b', c: 'd' }, { a: 'e', c: 'f' }];

I really like doing this:

const newData = data.map(only('a'));

I have a small library that I'm using, but was wondering if:

• This is possible currently natively with only.
• If there was a way to add it otherwise without complicating only.

Otherwise I'll just publish it as a tiny lib, just wondering if it's possible currently.