I am not sure this is good advice. in j6.2, prompt is implemented using 1!:1]1
in my copy of j7.1, require'misc' does not work and prompt does not exist. I do not know how other people are getting it to work in j7.1 -- Raul On Sat, Dec 31, 2011 at 9:09 PM, bill lam <bbill....@gmail.com> wrote: > From my understanding, 1!1[1 only works under ide session (ijx or jconsole), > but not for standalone scripts. If your applications will always run inside > an > ide session I think prompt or 1!:1]1 will both work with minor difference > as you noticed. Just use prompt if you prefer. > > Сбт, 31 Дек 2011, PackRat писал(а): >> bill lam wrote: >> > I'm puzzled. If prompt works for you, why 1!:1]1 didn't? >> >> Just to make sure that all info is known, this is NOT from jconsole, >> which I never use. Rather, this is in a J session in .ijx and where >> code is developed in .ijs. >> >> I tried the 1!:1]1 two different ways, using a cover verb (test1 and >> test2) and using in-line code (test3): >> >> -------------------------------------- >> require 'files strings' >> >> >> test1=: 3 : 0 >> d=. input 'enter something: ' >> smoutput < d >> ) >> >> test2=: 3 : 0 >> d=. input2 'enter something: ' >> smoutput < d >> ) >> >> test3=: 3 : 0 >> d=. 'enter something: ' 1!:1 ]1 >> smoutput < d >> ) >> >> input=: 3 : 0 >> y >> entry=. 1!:1 ]1 >> ) >> >> input2=: 3 : 0 >> y >> 1!:1 ]1 >> ) >> -------------------------------------- >> >> >> It turns out from further testing that J does NOT hang when using this >> approach. It only SEEMED that way because J was actually waiting for >> input. Somewhere along the line, I thought I'd try pressing the ENTER >> key--and, lo and behold, it seemed to break out of the "hang up" and >> returned me to the normal session condition of waiting for a command. >> Then I thought, "Maybe it was really waiting for input of some kind", >> and so I typed some random letters before pressing the ENTER key. Lo >> and behold (again!), it was working and was really waiting for input >> all the time. >> >> The reason I originally didn't pursue this any further is that the >> Dictionary misled me (is this a bug in the Dictionary?) when page >> dx001.htm clearly stated, "read from the keyboard (does not work within >> a script)". The behavior I described above fit into the Dictionary's >> statement (because the seeming misbehaviors were in a script), and so I >> didn't pursue it any further but asked here for alternatives instead. >> >> So, in answer to your question, bill: yes, it really does work; I just >> didn't realize it. Well, almost... >> >> The reason I didn't realize it is that I thought that (in input and >> input2) the literal y would display, and it didn't. By inserting >> "smoutput" ahead of the y's, the prompts displayed. With test3, the >> first line had to be split in two: the first displaying the prompt >> using smoutput, and the second the desired code. Because the prompt >> literals didn't display originally, I thought the code wasn't working, >> when in fact J was waiting for input. (The reason I thought the >> prompts would display in the code at the top of this email is that >> single literals usually seem to display in J, and I didn't realize that >> the safest approach apparently is to always use "smoutput" or "1!:2]2" >> to display them.) >> >> The lingering problem with this approach is that, in contrast to the >> "prompt" verb, the prompt literal and the user input are on separate >> lines--not a good thing. Here's the visual difference, using an >> underscore to indicate the location of the cursor: >> >> Your 1!:1]1 approach: The "prompt" verb: >> >> This is the data prompt: This is the data prompt: _ >> _ >> >> Or is there some documentation somewhere that indicates how your >> approach can be made to look like the "prompt" verb approach? >> >> I hope this extra information helps explain the situation more clearly. >> >> >> Harvey >> >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm > > -- > regards, > ==================================================== > GPG key 1024D/4434BAB3 2008-08-24 > gpg --keyserver subkeys.pgp.net --recv-keys 4434BAB3 > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
