I have a list of candidate data, an array of some thousands of 9 
integers each, and
a test routine that given a 9 integer list returns a 0 or 1 depending on 
whether the data is a
miss or a hit.

How do I apply the test to the large set of data and extract the few 
cases that constitute "answers"?

This is so simple that it applies to a whole host of problem sets, but I 
haven't found a simple
guide in the J documentation as to how this to solve the problem.

Thanks in advance, --Nick
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