[Javascript] JSON element has no properties - how to validate?

[Scott Reynen]

On Nov 21, 2007, at 1:20 AM, Michael Borchers wrote:

> I get an httpRequest(myRequest.response) formatted by php into a  
> JSON format, it looks like this:
>
> [{"price":42.4535153,"error":null}]
>
> I handle it this way so far:
>
> var transport            = eval(myRequest.response);
> var transportError     = transport[0].error;
> var transportPrice    = transport[0].price;
>
> Since "error" is empty (null) I get a warning: "transport has no  
> properties"!


What makes you think error being empty is causing this warning?  It  
certainly sounds like transport itself is empty.  I suggest you double  
check that myRequest.response and transport actually contain what you  
think they do.

Peace,
Scott