2017-11-07 13:11 GMT+01:00 Thierry Goubier <thierry.goubier@gmail.com>:

Now, if you explained me something like that:

people nilFirst ascending

Then I'd be more convinced. Or even

people sorted nilFirst ascending (if one would prefer restricting the implementations of #nilFirst).

I think we can easily support it. But of course it will work only for objects which understand #threeWayCompareTo:. Now it looks like
#(one nil two) sorted: #yourself ascending undefinedFirst.
And I prefer this version instead of extending collection with new sorting messages.