Using guard with a non-optional value assignment

Question

This is not a question about optional arrays, as one can see in the answers.

I like using guard because it makes your intensions clear. I've used it both for the optional version like this...

guard let c = MyOptionalArray else { return }

as well as for more traditional bounds checking on non-optionals...

guard MyArray.count > 0 else { return }

But now I'd like to use that count in following code. So I did...

guard let c = MyArray.count > 0 else { return }

which doesn't work, obviously, so I did what should...

guard let c = parts.count where c > 1 else { return }

But that says Initializer for conditional binding must have Optional type, not 'Int'. Now I understand the error, and tried a bunch of seemingly obvious changes to the format, but no go. Is there no way to use guard as an assignment on a non-optional value? This seems like something it should be able to do.

Answer 1

If you throw a case in there, it'll work. So as follows:

guard case let c = parts.count where c > 1 else { return }