The N0 V1 V2 sequence was introduced in release 6.02: https://www.jsoftware.com/docs/help602/release/nvv.htm
As for the manywithdrawn bidents and tridents, that was with release 5.01: https://www.jsoftware.com/help/user/previous504.htm look for "fork" However the Release Notes page which would state the removed lines is absent. I cannot find the parsing table of V4 with all those bi and tridents on the web site. I find this unfortunate as it would show newcomers what Ken had in mind when designing J. Is it there? The current parsing table has 9 lines. The one in my printed Introduction and Dictionary of 1993 has 13 lines. ~ Gilles Le 2020-01-15 à 11:21, Raul Miller a écrit : > More specifically, early versions of J had hooks and forks which > produced adverbs, and hooks and forks which produced conjunctions, and > the naming reflects this. > > Those hooks and forks were withdrawn from the language, but the naming > remains. To my knowledge, the only resulting naming change was > changing the parsing rule corresponding to forks from "trident" to > "fork". (The parsing rule for hooks is still "bident" at > https://www.jsoftware.com/help/dictionary/dicte.htm ) > > Also, a relatively recent change was that the left tine of a fork is > now allowed to be a noun (this was previously a syntax error) and the > noun is promoted to a verb using ("_). > > (In theoretic terms, you could say that a noun is a constant function > (or "fixed point") which returns itself, and this is exposed to J's > syntax rules specifically at the left tines of forks.) > > Thanks, > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
