Google emails is fickle some times: http://www.jbase.com/r5/knowledgebase/manuals/3.0/30manpages/man/sup22_IOCTL.htm
Jim On Thu, Sep 1, 2016 at 11:39 AM, Jim Idle <j...@temporal-wave.com> wrote: > I think that that is still a pretty poor way to code it, but if they have > it already, then recoding the logic to do better initialization is probably > too much work. > > However, I seem to remember coming across this in the dim and distant > past. What you need is to use the IOCTL function, that will tell you > details about the variable if it is a file variable. If it is not a file > variable (uninitialized or 0 or "" depending on emulation flavor) then it > either tells you that, or it returns false. Easy to use and the > documentatin is here: > > > On Thu, Sep 1, 2016 at 9:26 AM, 'Ed Clark' via jBASE < > jbase@googlegroups.com> wrote: > >> There is a thread on the mvdbms google group asking about it. I think the >> original requestor was asking because they are doing a migration and keep >> stumbling over >> IF FILEVAR=“” THEN…. >> which worked on the old platform but aborts on the new one if the file is >> already open. Probably something related to COMMON which is initialized to >> to an empty string or 0 in some places and unassigned in other. If you’re >> keeping a file in COMMON to avoid repeated OPENs, you need to check. >> >> The universe DESCRINFO distinguishes between database files and >> sequential files as well as between strings, arrays, and unassigned >> variables. I guess you could write a generalized logging procedure that >> could take either a hashed or sequential file as a parameter and write >> appropriately, or a string or empty variable and return the logged message >> in that. >> >> On Aug 31, 2016, at 6:41 PM, Jim Idle <j...@temporal-wave.com> wrote: >> >> I can't think how that would possibly be useful within a reasonably >> designed program - why do you need it, out of curiosity? >> >> The only way I know of is to write a trivial C function to do the same. >> >> Jim >> >> >> >> >> >> On Thu, Sep 1, 2016 at 4:35 AM +0800, "'Ed Clark' via jBASE" < >> jbase@googlegroups.com> wrote: >> >> universe has a basic function DESCRINFO that returns the “type” of a >> variable—it is a simple variable, a file variable, a select list, assigned >> or unassigned, and so forth. >>> Is there an equivalent in jBase? >>> >>> -- >>> -- >>> IMPORTANT: T24/Globus posts are no longer accepted on this forum. >>> >>> To post, send email to jBASE@googlegroups.com >>> To unsubscribe, send email to jbase-unsubscr...@googlegroups.com >>> For more options, visit this group at >>> http://groups.google.com/group/jBASE?hl=en >>> >>> --- >>> You received this message because you are subscribed to the Google Groups >>> "jBASE" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to jbase+unsubscr...@googlegroups.com. >>> For more options, visit https://groups.google.com/d/optout. >>> >>> >> -- >> -- >> IMPORTANT: T24/Globus posts are no longer accepted on this forum. >> >> To post, send email to jBASE@googlegroups.com >> To unsubscribe, send email to jbase-unsubscr...@googlegroups.com >> For more options, visit this group at http://groups.google.com/group >> /jBASE?hl=en >> >> --- >> You received this message because you are subscribed to the Google Groups >> "jBASE" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to jbase+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> >> >> -- >> -- >> IMPORTANT: T24/Globus posts are no longer accepted on this forum. >> >> To post, send email to jBASE@googlegroups.com >> To unsubscribe, send email to jbase-unsubscr...@googlegroups.com >> For more options, visit this group at http://groups.google.com/group >> /jBASE?hl=en >> >> --- >> You received this message because you are subscribed to the Google Groups >> "jBASE" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to jbase+unsubscr...@googlegroups.com. >> For more options, visit https://groups.google.com/d/optout. >> > > -- -- IMPORTANT: T24/Globus posts are no longer accepted on this forum. To post, send email to jBASE@googlegroups.com To unsubscribe, send email to jbase-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/jBASE?hl=en --- You received this message because you are subscribed to the Google Groups "jBASE" group. To unsubscribe from this group and stop receiving emails from it, send an email to jbase+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
