1. (;i{.&.>1) <;.1 az  (various ways of generating left argument; also use
<;._2 depending on left argument).
2. b <;._2 az



On Tue, Oct 9, 2012 at 7:32 AM, Ian Clark <[email protected]> wrote:

> 1. Suppose:
>    az=: 'abcdefghijklmnopqrstuvwxyz'
>    i=: 3 2 5 8 5 3      NB. -(for example)
>
> How best can I partition az into parts pp where (n{pp) has length (n{i) ?
> viz.
>    pp -:  'abc';'de';'fghij';'klmnopqr';'stuvw';'xyz'
>
> 2. Suppose instead of (i) I have a boolean (b) marking where to cut az ...
>    b =: 0 0 1 0 1 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0
> (c/f dyadic {enclose} in APL+)
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