--- copied from the vocabulary page for ": --- Any negative sign is placed just before the leading digit. If w>:0 and d>:0, the result is right-justified in the space. Otherwise (if w<0 or d<0), the result is put in exponential form (with one digit before the decimal point) and is left-justified except for two fixed spaces on the left (including one or a possible negative sign).
--- end copy --- I believe that Henry is saying, that: 0j_3": 3.14 3.140e0 0j_3": _3.14 _3.140e0 Doesn't have two fixed spaces on the left, so the implementation and the documentation disagree. If the implementation is correct, and I believe it is, then the documentation should change. Tom Arneson -----Original Message----- From: programming-boun...@jsoftware.com [mailto:programming-boun...@jsoftware.com] On Behalf Of Roger Hui Sent: Thursday, March 11, 2010 23:41 To: Programming forum Subject: Re: [Jprogramming] Bug in printf utility You can blame J primitives for problems in your application if you want, but if the J implementation does the same regarding errors in C compilers, the number of errors in the implementation would be legend. I don't remember what exactly are your complaints with ":, but at least one item was an extension that you argued should be there but which I declined to implement. ----- Original Message ----- From: Henry Rich <henryhr...@nc.rr.com> Date: Sunday, March 7, 2010 17:01 Subject: Re: [Jprogramming] Bug in printf utility To: Programming forum <programming@jsoftware.com> > The problem with fixing it is that ": in J6.01 and later does > not > conform to the Dictionary. I don't want to change printf > until the > Dictionary and the implementation agree (or there has been a > pronouncement on which one is incorrect). > > Henry Rich > > Tom Arneson wrote: > > This is my second try to get the 'e' format fixed in printf. > > > > > > > > Here's the problem: > > > > > > > > NB. ---------------------------------- > > > > JVERSION > > > > Installer: j602a_win.exe > > > > Engine: j602/2008-03-03/16:45 > > > > Library: 6.02.050 > > > > > > > > Load 'printf' > > > > > > > > '%0.4e' sprintf 3.14 > > > > .1400e0 > > > > > > > > '%0.4e' sprintf _3.14 > > > > 3.1400e0 > > > > > > > > '%0.4g' sprintf 3.14%1e6 > > > > .1400e-6 > > > > > > > > NB. The first digit of a scientific format is dropped. > > > > > > > > NB. ------ end J ---------------------------- > > > > > > > > This utility must not be used by many, and I've switched to > the 8!: family > > for most of my formatting, but it is in the main folder, and > should work > > properly, or be removed from the J distribution. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
