Empty field doesn't exist for arrays, right?

[Andrej Mitrovic]

On 3/8/11, Jesse Phillips <jessekphillips+D at gmail.com> wrote:
> What if you are trying to create a method which will act as a property for
> the array? If you get it wrong you would get the error that an array doesn't
> have the property and scream, "I know that is why I'm building a function
> for it. Why won't it find my function stead of looking at what array
> provides!"

But wouldn't this case be much more obvious with the property error
message? Or maybe it wouldn't.. all I know is I got bitten by this
error message a couple of times and it always got me that WTF look on
my face.

How common are typos in invoking methods versus typos in implementing
methods like a UFCS function?