[Grace-core] [A Graceful Blog] Comment: "From Lancaster to Portland"

James Noble kjx at ecs.vuw.ac.nz
Mon Sep 26 20:01:26 PDT 2011


> I  think that we agree on this.

yes! I think so too!  Well on the nil & None anyway...

> As Kim says, for any particular application, we may make a specific null object.  For example, for trees, we will need an EmptyTree object.  Again, as Kim says, we can give these objects useful operations, so EmptyTree can have a height.

yep - and that shouldn't conflict with a nil somewhere in a library a the medium or higher language level...

we'll still have to decide about brands.  and other stuff.

J


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