[Solution] Challenge Problem

Hi Everyone,

I hope you enjoyed our course so far! You might have noticed one challenge problem.

If you have ended up with a solution like this:

        > { results: { $gte: 70, $lt: 80 } }

Output would be 1020 documents. But that is not a correct answer. You must be wondering why? Here is one sample document from the above query:

Now, this doesn’t seem right. The query { results: { $gte: 70, $lt: 80 } } would have worked fine if results was a single field and not an array. For arrays, if you want to match all the specified query criteria, you would want to use elemMatch operator.

For more explanation, I would like you to explore elemMatch MongoDB documentation.

Hope it helps!