Pascal Jasmin wrote: PJ> PJ> if you want to pass a gerund (or boxed noun) to a function, it must PJ> either be all verbs (with single adverbs as strings permitted), or all PJ> nouns. So this is possible. PJ> '`a b c' =. '/';+`- PJ> but it fails for an adverb phrase. PJ> '`a b c' =. '/\';+`- PJ> |spelling error
You are missing out on the more general notion of Atomic Representations. Gerunds are arrays of verb ARs. ARs are uniquely defined for *any* syntactic class, though, and you are free to mix them: a =. + b =. - c =. /\ d =. 42 (ar =. 5!:1) ;:'a b c d' +-+-+---------+------+ |+|-|+-+-----+|+-+--+| | | ||5|+-+-+|||0|42|| | | || ||/|\|||+-+--+| | | || |+-+-+|| | | | |+-+-----+| | +-+-+---------+------+ '`aa bb cc dd' =. ar ;:'a b c d' aa + bb - cc / \ dd 42 nameclass ;:'aa bb cc dd' 3 3 1 0 (aa cc ,: bb cc) 1 2 3 1 3 6 1 _1 2 Further reading: http://jsoftware.com/help/dictionary/dx005.htm for 5!:1 (and, if you like, its reverse 5!:0); then re-read http://jsoftware.com/help/dictionary/d001.htm to re-check how the back-tick in '`a b c' is defined. Further further reading: Bernecky, Robert, and R.K.W. Hui, Gerunds and Representations, APL91, ACM. Martin PS: Apropos "reading": I cannot read your (or anybody else's) message parts with unicode box characters on the machine which receives the newsified forum messages. If you want me to be able to read those message parts, please adhere to the Forum rules as stated in <http://www.jsoftware.com/jwiki/System/Forums>: **Formats** The mailing lists send out emails in plain text format. For best results, please send messages to the forum in this format. When copying J session output to an email, first set box-drawing characters to Ascii. The IDEs have a menu item for this, e.g. in J8 Qt, select View|Toggle Ascii Box Drawing. Having said that, and *not* having been able to read your code, just guessing from your "Subject: I'm afraid you are re-inventing a wheel. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
