u"v m"v Copy Rank Conjunction
The benefit of being able to use v itself, instead of its list of ranks, n, is: it saves you having to find the actual ranks of v if you want to create a verb out of verb u (or noun m) having the identical ranks of v .
a not-uncommon requirement.
Take e.g. these three dual-valence verb definitions which share the same body but differ in name and rank:
v=: (3 : '<:y') : (4 : '>:x,y') v010=: v"0 1 0 v001=: v"0 0 1
Showing the list of ranks for each:
v b. 0 _ _ _ v010 b. 0 0 1 0 v001 b. 0 0 0 1
Having a look at the behaviour of the verb
x,y (dyadic case of Amend) which we are going to use with different ranks:
, b. 0 _ _ _ 'abc' , 'DE' abcDE 'abc' ,"1 0 'DE' abcD abcE 'abc' ,"0 1 'DE' aDE bDE cDE
Copying the ranks from the verbs we just defined results in similar behaviour:
'abc' ,"v 'DE' abcDE 'abc' ,"v010 'DE' NB. left: whole, right: atom abcD abcE 'abc' ,"v001 'DE' NB. left: atom, right: whole aDE bDE cDE
Same goes for the monadic case:
,"v 'DE' DE ,"v010 'DE' NB. monadic rank 0 means: atom D E
v=: < NB. sample v - Box (<) v b. 0 NB. the list of ranks of v _ 0 0