(3,:3) *:@{:;._3 list
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Also look at
   _3 u\ list

Henry Rich

On 5/27/2023 3:04 AM, Sanju Dutt wrote:
I know i can partition a list like this:
  list=:_1 4 6 8 3 5 8 _1 7 4
  <;._1 list
+-----------+---+
|4 6 8 3 5 8|7 4|
+-----------+---+

Here a new partition is made when encountering a _1.
But what if I  want to apply an operation on every 3rd item in
  list?
Do I need to write a verb for doing that?
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