I really like that construction!
On Monday, February 8, 2016 at 10:49:41 PM UTC-5, Greg Plowman wrote: > > If only Nullables can be null, could we formally define this? > > isnull(x::Nullable) = x.isnull # already defined in nullable.jl > isnull(x) = false # extra definition for everything else > > > >> isnull( lp15 ) --> true >> isnull( lp16 ) --> MethodError: `isnull` has no method matching isnull( >> ::Date ) >> > >
