Re: Wrong result from dyadic ¨ with empty argument

[Dr . Jürgen Sauermann]

Hi Ben, thanks, fixed in SVN 1287. Best regards, Jürgen On 5/28/20 6:07 PM, Ben Harris wrote: Thank you for GNU APL!  I think I've found a bug in SVN revision 1286. Applying the dyadic ¨ ('each') operator where one or both arguments is an empty array results in a scalar rather than an empty array as the result:       (0⍴0)+¨1 0       (0⍴0)+¨(0⍴0) 0       1+¨(0⍴0) 0       ⍴((0⍴0)+¨(0⍴0))       ⍴⍴((0⍴0)+¨(0⍴0)) 0 Both ISO/IEC 13751 and the IBM APL2 Reference seem to me to say that the shape of the result should be the shape of the non-scalar argument, so the first three expressions above should all return 0⍴0 rather than 0.