I cannot understand your questions, could you give a simple and concrete example?
Птн, 20 Июл 2012, Ian Clark писал(а): > For all my exposure to J, I can't answer the following simple(?) > questions. Can someone help please? > > Take the fully parenthesized representation of a given tacit verb: foo > (viz 5!:6 <'foo') > --note: "verb", not "sentence" (which might be a noun). > Take what's inside any pair of balanced parens: (...). Give it a name: > baa, so we can formally replace (...) with (baa) . > > 1. Is baa always a verb? > Answer: no, because I can make phrases like: (-~) appear. > BUT are there only a small number of special cases I can detect > and allow for, like (-~)? > > 2. If baa is not a verb, how can I determine its type? > -short of actually assigning it to a local name: baa=. (...) and > calling 4!:0<'baa' ? > > 3. Is there an easy way to tell if baa gets called monadically or > dyadically, and if it gets the y-argument of foo -- and the x-arg too? > Ignore the case of baa getting an intermediate noun -- I can > determine this from the paren nesting structure. > Ditto a constant. > Note I'm only concerned with the output of 5!:6, not what's > syntactically possible when a tacit verb can be entered by hand, where > a phrase in parens can of course be a noun. > > > I guess the answers can in principle be found from a very careful > reading of Help > Dic > E. Parsing and execution, and F. Trains. But I > must confess this is beyond me. Has the matter been summed-up > elsewhere more clearly? > > (And -- no, I haven't forgotten tte.ijs.) > > Ian > ---------------------------------------------------------------------- > 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
