(errata) I wrote: > Left fold works basically the same way, but evaluates from left to right > instead of from right to left. In other words u~/@|.@,&x y
That puts x on the wrong side of the list. I should have written: u~/@|.@(x&,) y FYI, -- Raul ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
