[Jprogramming] Tacit adverb definitions?

[Dan Bron]

Oleg wrote:

> Is there a precedent of such use of $: and : ?

Sure, it's used all the time to make monads invoke their dyadic counterpart with a useful default value.

	   require 'strings'
	
	   cut
	' '&$: :([: -.&a: <;._2@,~)
	
	   '.' cut 'Sentences end in periods.  Words in spaces.' 
	+------------------------+-----------------+
	|Sentences end in periods|  Words in spaces|
	+------------------------+-----------------+
	       cut 'Sentences end in periods.  Words in spaces.' 
	+---------+---+--+--------+-----+--+-------+
	|Sentences|end|in|periods.|Words|in|spaces.|
	+---------+---+--+--------+-----+--+-------+
		   
	   require '~Phrases\phrc2.ijs'

	   v1
	10&$: :^.
	   v2
	10&^. :($:@] * ^.@(10"0) % ^.@[)


	   require 'dll'

	   XOR
	$:/ :(22 b.)

It is also used in the dyad to invoke the monad, but I can't think of any standard examples at the moment, nor a useful pattern to search for.  You can not use  $:  in the obverse to invoke the nominal (nor with  ..  .:  D.  nor within any other aspect of a verb).

-Dan