Hi Harvey,
You are right that you can't use *. but you can use # or { depending on whether
you are working with booleans or indices
chars=. 'ABCDEFGHIJKLM'
mask=. 0 1 0 0 1 0 1 0 0 0 0 0 0
mask # chars NB. use Copy (dyadic #) to choose which characters get
copied
BEG
I. mask NB. Indices (monadic I.) returns indices of 1's
1 4 6
(I. mask) { chars NB. use From (dyadic {) to select indices from the
character list
BEG
Hope this helps
Cheers, bob
> On Apr 15, 2021, at 22:38, HH PackRat <[email protected]> wrote:
>
> mask=. 0 1 0 0 1 0 1 0 0 0 0 0 0
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