The addition of DD for verbs is a welcome one. I have a suggestion
regarding the syntax, however. The use of {{ }} to delimit a DD verb
seems to mirror APL, but it overloads existing syntax in j. The previous
form, (. )., was better in this regard, but I have an alternate proposal.
Use (: to open a DD, and plain ) to close it. Advantages:
- shorter
- : matches the existing syntax for non-tacit verbs (3 : et al)
- suggests a syntax for ambivalent verbs (:monadic form:dyadic form)
which also matches the existing non-tacit syntax
- suggests a syntax for DD adverbs and conjunctions, perhaps with (. )
(Added bonus: the leading : matches expression syntax in k9.)
Thoughts?
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