_. also does weird things as the x value for ".
NB. the following work as expected: _". '25' 25 _". 'Haoussa' _ _". 'Gisir' _ _.".'Haoussa' _. _.". 'GISIR' _. NB. but somehow this fails on some magic values: _.".'Gisir' |NaN error | _. ".'Gisir' _. ". 'gisir' |NaN error | _. ".'gisir' (The original purpose is to find whether choices in a questionnaire pick-list should be construed as numbers or as strings. I prefer to use _. as the default value because I could vaguely consider using _ and __ as authorized values some day. But I will stick with __ this time round.) De : Elijah Stone <elro...@elronnd.net> À : programm...@jsoftware.com Sujet : Re: [Jprogramming] bug: _. and logical operations Date : 06/05/2022 13:15:01 Europe/Paris _. may give garbage results. It shouldn't hang. On Fri, 6 May 2022, Razetime wrote: > Although this does not seem like intended behaviour, it is worth mentioning > that NuVoc <https://code.jsoftware.com/wiki/Vocabulary/underdot> explicitly > states that _. is not recommended for use in J computations. > > On Fri, May 6, 2022 at 4:30 PM <jph.but...@mailoo.org> wrote: > >> Hello, >> >> >> >> _. does not mix well with logical operators. The following hang and use a >> lot of CPU on J 9.03 (Windows and Linux): >> >> >> >> 1 +. _. >> >> 1 *. _. >> >> +. / 8 0 _. >> >> >> >> Note, that I have no particular use for these sentences, I just stumbled >> across them due to a bug in my program. >> >> >> >> Philip >> >> >> >> >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm >> > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
