_. <: _ giving 0 is a bug and (I think) had previously been fixed for the next beta. It's one of those compiler differences.
----- Original Message ----- From: Henry Rich <[EMAIL PROTECTED]> Date: Monday, February 4, 2008 5:29 Subject: [Jbeta] J602 incompatibility: _. <: _ To: 'Beta forum' <[email protected]> > On J602, > _. <: _ > gives 0. On 601 it gave 1. > > This is not a bug but it caused me a few minutes' debugging & > might be mentioned for others. > > It's not a bug because the behavior of _. is undefined. > But in > a way, it is a J problem because working old code breaks in the > new release. > > Just thinking... I try never to have _. in my data, but it's hard > to be sure. How hard would it be to have a debug setting that > gives a domain error if _. is ever produced? Then I would > know that I would be immune from a problem like this. > > Henry Rich ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
