On 2014-07-14 16:15:32, Juergen Sauermann wrote: > Since ⎕ES is not ISO-standard anyhow, I take the freedom to trade performance > for APL2 compatibility.
But it is. See sections 11.5.7 and 11.6.5. And standard says it should return nil for empty right argument, which means not returning any value at all. -k
