[Jprogramming] error in dictionary?

[Kip Murray]

Replace &. by &.: -- it's a "rank" thing.

Nicholas Spies wrote:
> On page 18. Geometry of the J Dictionary, of the online documentation 
> that came with J, the example definition
> 
>     (length=: +/&.*:) 5 12     
> 
> yields 5 12 instead of the displayed 13
> 
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