I think he was simply referring to a normal exit from J once he's done using it. For the "choking" case, what to do depends on the OS and the J interface one is using: for jconsole in emacs under Windows, I enter "Ctl-c Ctl-\". However, I have discovered ways to choke J so badly it locks up my machine and forces a power-down re-boot.
On Tue, Jan 21, 2014 at 10:51 PM, Don Kelly <d...@shaw.ca> wrote: > If in reference to 'exit' you are referring to J going of to never never > land and not responding to anything- I fail to se where some J command is > going to work. In Windows I can ctrl-alt-delete and shut down J (with loss > of what I was doing) . Does this situation occur- yes , definitely, -likely > because for some unknown reason, I have set up infinite looping or a > situation where J simply chokes (message I get is J is running normally?)- > If it can interrupt a process , q' ' is great but If one cannot enter q ' > ' because the machine is busy chasing its own tail then what good is it? > > Don Kelly > > On 20/01/2014 10:31 AM, Devon McCormick wrote: > >> This is a good point and it's been brought up before. I define >> q=: 2!:55 >> and enter >> q'' >> to exit J but it's not standard. We should probably make "exit" more >> accessible. >> >> >> On Mon, Jan 20, 2014 at 1:23 PM, Blake McBride <bl...@mcbride.name> >> wrote: >> >> Greetings, >>> >>> Just providing some feedback.... >>> >>> The fist thing I wanted to know when I started J was how to exit. I did >>> some research and discovered 2!:55. I then defined a verb and used that >>> to >>> exit. Therefore, in order to get a clean way to exit a new language, I >>> had >>> to learn what a verb is, what system verbs were available, how to define >>> it, and how to load it. (I know about ^d but think that is hardly a >>> clean >>> way to exit.) >>> >>> Now, years later, I discover the pre-defined verb 'exit'. I checked the >>> docs, especially "Learning J". There is no mention of 'exit'! >>> >>> As someone who has played with many languages over the years, and in fact >>> an author of one, I respectfully suggest updating chapter 1 of Learning J >>> to tell the user how to exit. Making a research project out of the first >>> obvious desire is an unnecessary impediment to a language acquision. >>> >>> Additionally, since I discovered 'exit', a comprehensive dictionary of >>> pre-defined verbs would be very helpful. (I know about z, etc.) >>> >>> Thanks. Just some thoughts... >>> >>> Blake McBride >>> ---------------------------------------------------------------------- >>> For information about J forums see http://www.jsoftware.com/forums.htm >>> >>> >> >> > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > -- Devon McCormick, CFA ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
