Chrome went crazy on me when I was noticing other messages in this thread, and I was not able to prevent that message from going out even though I was not wanting it to be sent, I've restarted chrome, though, and after reading that you're just interested in numbered object instances, I think I'd go with:
isRef=: e. conl bind 1 Thanks, -- RaulOn Tue, Jul 10, 2018 at 10:49 AM Raul Miller <[email protected]> wrote: > > The trick here, of course, is that objects are not values - you can > only have a reference to an object as a value, and that reference is > itself a primitive member of the referring object. > > Which brings up the issue: how did you lose track of what it was you > were dealing with? If you're building dev tools that's fine. If you're > wanting this for production code, though, you might want to rethink > your approach. > > Anyways, ... here's how I'd approach this issue: > > isRef=:3 :0"0 > try. > 0 <: 4!:0 y > catch. > 0 > end. > ) > > Thanks, > > -- > Raul > On Mon, Jul 9, 2018 at 9:41 PM 'Jon Hough' via Programming > <[email protected]> wrote: > > > > I want to test if a given member variable of an object is primitive (e.g. > > one of the J datatypes - literal, integer etc etc) or an object. > > > > coclass 'MyClass' > > > > create=: 3 : 0 > > m=: 'something' > > ) > > > > > > Here is one method: > > > > myClass =: '' conew 'MyClass' > > a: -: {. (copath ::( a:"_) m__myClass) -. <, 'z' NB. return 1 if > > primitive, 0 if an object. > > > > This works, except if the member is defined in a parent class. > > > > coclass 'MyOtherClass' > > coinsert 'MyClass' > > > > create=: 3 : 0 > > create_MyClass_ f. '' > > '' > > ) > > > > > > myOtherClass =: '' conew 'MyOtherClass' > > a: -: {. (copath ::( a:"_) m__myOtherClass) -. <, 'z' > > > > > > the above returns 0, but member is a primitive member of the MyOtherClass > > instance. Ideally this > > should return 1 in this case, since m is still a primitive member of > > MyOtherClass. > > > > Any better way to test for primitive members? > > > > Thanks, > > Jon > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
