Q: Why use typeof

[peterorosz]

Hi, firstly I'd like to thank you for writing a great book. I purchased it yesterday and already found it very helpful.

One question I have concerns the way you validate whether /api/get/{id} returns an actual result from the database:

if (typeof result !== 'undefined') {
    return reply(result);
}

Why not take advantage of the type coercion and simply:

if (result) {
    return reply(result);
}

Does typeof cover some exceptional cases I do not foresee?

Thank you very much!

[Cifer-Y]

I also want to know that.