Viktor Cerovski wrote:
>
>
> Roger Hui wrote:
>>
>> [...]
>> There are some arguments against hook itself. See:
>> http://www.jsoftware.com/jwiki/Essays/Hook%20Conjunction%3F
>>
> That is an interesting link.
>
> It should be noted that it's also possible to define conjunction
> representing fork, using explicit conjuction/tacit adverb hybrid
> definition:
>
> F =: 2 : '`u(`v)(`:6)'
>
> Examples:
>
> f g F h
> f g h
> f g F h u F v
> (f g h) u v
> u f g F h F v
> u (f g h) v
> w f g F h u F v
> w ((f g h) u v)
>
>
Hook (u v) can also be obtained via F as:
[ u F ] [ v F ]
([ u ]) ([ v ])
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