> db =. 1 j. <: #;.1~ b=. 0 1 1 0 0 1
> _1 |. ('abc' {.~ #x) #!.'.'~ x =. db , 0 j. b i. 1
> .ab..c
Whoops, when I wrote:
_1 |. ...
it really should've been:
li =. b i. 1
(-li) |. ...
The tacit verb could be rewritten to reflect this, either by boxing up reusable
results and later picking apart the boxes, which
would would make it inscrutibly complex, or by recalculating li , which would
make it unsatisfyingly redundant.
So I suggest instead an explicit verb with temporary variables:
expand =: dyad define
db =. 1 j. <: #;.1~ x
(-li) |. (y {.~ #cpx) #!.'.'~ cpx =. db , 0 j. li =. x i. 1
)
0 1 1 0 0 1 expand 'abc'
.ab..c
-Dan
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