On 24/09/15 08:31, Ben Caradoc-Davies wrote:
> Would it not be better to add an additional top-level guard so that when
> object is null, null is returned? This would separate error handling
> from null pass-through, and be consistent with the behaviour of filter
> functions like centroid.

Looking again suggests that the null guard should be on date alone.

-- 
Ben Caradoc-Davies <[email protected]>
Director
Transient Software Limited <http://transient.nz/>
New Zealand

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