Fails on the empty list. Likewise Oleg's solution.
(> 0 , }:) i.0
|length error
| (>0,}:)i.0
({. , 2 </\ ]) i.0
0
----- Original Message -----
From: Chris Burke <[EMAIL PROTECTED]>
Date: Tuesday, March 4, 2008 21:47
Subject: Re: [Jprogramming] leading edge of a boolean array
To: Programming forum <[email protected]>
> Oleg Kobchenko wrote:
> > ({. , 2 </\ ]) 0 1 0 1 1 0 1 1 1 0 1 0
> > 0 1 0 1 0 0 1 0 0 0 1 0
> >
> > --- bill lam <[EMAIL PROTECTED]> wrote:
> >
> >> how to find the leading edge of a boolean array,
> >> eg. for this array
> >> 0 1 0 1 1 0 1 1 1 0 1 0
>
> Also:
>
> (> 0 , }:) 0 1 0 1 1 0 1 1 1 0 1 0
> 0 1 0 1 0 0 1 0 0 0 1 0
>
> (defined as firstones in script parts).
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