R. E. Boss wrote:

> I ... concluded you want all vectors where at least two 1's are
> separated by at least one 0.
>
> This is also achieved by 
>    (1+./@:< [:}:#;.1~)"1

You correctly interpreted my intent.  Thank you very much for this concise 
alternative. 
 
--
Tracy B. Harms
 
The advantages of executability and universality 
found in programming languages can be effectively 
combined, in a single coherent language, with the
advantages offered by mathematical notation.
Kenneth E. Iverson


      
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