"tacit if" behaves more rationally... returns/keeps the null. 'no'"_`('yes'"_)@.] ''
'no'"_`('yes'"_)@.({.!.0) '' no On Saturday, June 20, 2020, 07:25:48 p.m. EDT, Paul Jackson <plj...@gmail.com> wrote: I've grown accustomed to following some verbs with '' because there's no way to write a niladic verb in J. Unfortunately I have a verb that uses its argument to decide whether to update or not. That led me to learn the hard way that '' is true. try=: 3 : 0 if. y do. 'yes' else. 'no' end. ) try '' yes I thought I could force a domain error, but no. try {.'' yes I thought maybe J was doing {. and that space is non zero, but {.a. is also true, as was everything else I could think of. This may not constitute a bug, but it is unexpected behavior. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm