Roger and Eric have referred to NaN in their messages. I suggest that this usage should be avoided.
NaN is meaningful only in reference to the IEEE floating-point spec. J is above that. J deals with numbers. Floating-point is an implementation detail that should not be alluded to in the description of the language. _. is indeterminate. It is not NaN. For one thing, it is a number (at least it used to be - I haven't had the courage to move to rbeta yet), while NaN is explicitly not a number. And, there are many values and kinds of NaN, but only one indeterminate. So, NaNs in external sources produce unpredictable results. Use of _. produces unpredictable results. But they are not the same things. Henry Rich > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Eric Iverson > Sent: Sunday, February 24, 2008 9:37 AM > To: Beta forum > Subject: Re: [Jbeta] issues not yet resolved > > I am sorry to say that we won't get fixes for these two > problems into this > release. We have just run out of time and need to get this > release out so we > can clear the decks for the next round of activities. The NaN > problem turned > into a surprisingly difficult mess and took much longer than expected. > > Your two bugs will be at the top of the list for 602. > > ----- Original Message ----- > From: "bill lam" <[EMAIL PROTECTED]> > To: "Beta forum" <[email protected]> > Sent: Saturday, February 02, 2008 12:05 AM > Subject: [Jbeta] issues not yet resolved > > > > [Jbeta] for-loop, continue, switch-case 30 Sep 2007 > > http://www.jsoftware.com/pipermail/beta/2007-September/002383.html > > > > [Jbeta] m&i. and boxed unicode 30 Sep 2007 > > http://www.jsoftware.com/pipermail/beta/2007-September/002382.html > > > > Will they be fixed? > > > ---------------------------------------------------------------------- > > For information about J forums see > http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see > http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
