I often use Rank to select sub-arrays from an array:
  <"0 i. 7
--Art
------------------
Quoting general-requ...@jsoftware.com:
. . .
> Message: 2
> Date: Mon, 9 Jan 2012 11:46:24 -0500
> From: Tom Szczesny <tav...@gmail.com>
> Subject: Re: [Jgeneral] Data from csv files
> To: General forum <general@jsoftware.com>
> Message-ID:
>       <CABn7SNYFw2gyAPKcjx1DMLEru97NMTst6zoGx=3olq1rko7...@mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> As mentioned in the dictionary entry for cut:
> the phrase   u;._2 y     applies the verb u to each interval created by cut,
> where the fret is the last item, and marks the ends of the intervals.
>
> What is the notation for applying the "each" concept to a verb independent
> of   cut   ?
> For example,
>   <i.7
> +-------------+
> |0 1 2 3 4 5 6|
> +-------------+
>
> How do you express
>    <  each  i.7
> and get 7 individually boxed items?
> (I could not find an entry for "each" in the Index, nor in the Vocabulary.)
. . .
> End of General Digest, Vol 76, Issue 8
> **************************************

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