Brian Schott <[email protected]> wrote: > All, > I think Bill's solution works for my question: dbover'' (13!:20). > In contrast to Gilles, I think dbinto'' (13!:21) works as designed, because > changing the value of t to 99 does not change the code in line [0], which > it then executes with dbinto or dbover. > > It is rather difficult to find the names and descriptions of each of the > dbxxx verbs. The information is scattered and incomplete. I found a rather > good brief page (in a link hidden on the NuVoc page under the name > Foreigns). But it does not have dbinto and dbout which are pronouns for > 13!:n's, and I don't know where one finds dbstop and dbstops defined. > > https://code.jsoftware.com/wiki/Vocabulary/Foreigns > > https://www.jsoftware.com/help/dictionary/dx013.htm is also helpful, but > outdated and does not tell the shortcut dbnames at all. > > Returning to my original question, but changing it a little to ask how to > NOT run the current line but force the debugger to stop before the next > line even though it has not been stopped, requires assumptions and two > steps. > The assumption is that a set stop has lead to the current line. > Step 1 is setting a stop on the next line. An easy way to do this is use > dbstops'<this verbs name>' to set stops everywhere in this verb. > Step 2 is to dbnxt'' . > So for example, consider these steps: > > h=: 3 : ('t=. 2 3*y'; '1+t'; 't') > dbss'h 0' > dbr 1 > 3 4,h 5 6 7 > |stop: h > | t=.2 3*y > |h[0] > dbsq'' NB. queries what stops are active > h 0 > dbstops'h' NB. or dbstop'h' > dbsq'' > h *:*; > dbnxt'' NB. continue on the next line without doing this line > |stop > | 1+t > |h[1] > NB. remember here, t has never been assigned a value, so 1+t is an > error
Bill mentioned this in a previous reply, but in case you missed it I thought it's worth pointing out again: The noun "dbhelp" gives a nice, concise overview of the db* family. Nicely, for all ones that simply alias a 13!:n foreign, it tells you which one, so referencing documentation is fairly straightforward. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
