Just in case it matters, are you regarding Hello & Jello as distinct
words here, or is
space just another character?
If they're separate, then we need only examine (;: s) or (cut s),
brackets only to delimit
the J idioms.
Thanks,
Mike
On 09/04/2021 14:48, Emir U wrote:
s=: 'Hello Jello'
Given a string like the above, I need to tabulate the number of occurrences of
every letter for every prefix of length >=k. I also need to know the length of
the prefix. So:
<prefix length> <prefix> <letter> <count>
As an example, prefix length=3, prefix=ell, letter=o, count=2
In my real use case k may be quite large (say 20) and the string may be very
long. The final form needs to be something I can slice and dice thereafter
(like perhaps a sparse array). I'd be grateful for any advice as to how to
tackle this.
Emir
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