Re: [Bug-apl] Operator Idiosyncrasies

[Juergen Sauermann]

Hi,

thanks, fixed in SVN 677.

Interestingly, my APL2 reports DOMAIN ERROR on

      0 +/ 99

/// Jürgen

On 09/11/2015 09:25 PM, Mike Duvos wrote:

Just in case it isn't instantly obvious what's wrong in the prior post, GNU APL is returning the wrong thing for dyadic reduce with a left argument of zero and a scalar right argument.

If f is a scalar function, and X is a non-empty vector, or a scalar which gets treated as a 1-element vector, then the _expression_...

      0 f/ X

Should return a vector of length 1+⍴,X filled in with the identity for f.

Some examples...

      0 +/ 99
0 0
      0 +/ 10 20 30
0 0 0 0
      0 ×/ 100 200 300 400
1 1 1 1 1

In GNU APL...

      0 +/ 99
99

And that's why the two results in the prior post differ.