On 24 May 2013, at 08:31, Stéphane Ducasse <stephane.ducasse@inria.fr> wrote:

This is strange that when I type factori I get an empty completion.

Stef

That's because it is computing the answer in the background ;-) No seriously, it seems to think the type of the receiver is Number, not Integer, and #factorial is defined on Integer. Sven