Hi. I’m blanking on something basic and research isn’t helping. When the blindingly obvious solution is revealed I will blame a combination of sleep deprivation and senescence. I’ve got a long list of coordinates ordered by desirability. I want to invoke f (a custom script) with each coordinate in turn. f may return 0 (failure), in which case I want to invoke it again with the next coordinate. When f (eventually) returns 1, I want to terminate—the remainder of the coordinates should not be processed. (Note that the very first invocation of f may return 1.)
This *almost* feels like ^: in its Do While form. Almost. It also feels like SCs around list operations (though they seem to be limited to primitives). Help. Many thanks. Ed Sent from my iPad ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
