Once you know how to unbox an array and to filter a sequence, array lookup comes for free. It feels very much like opening a box of Swiss chocolate and then picking your favorite:
Unbox the array with [].
Pick the $i-th item in the sequence using a predicate with an integer [$i].
Example 7.11. Array lookup.
[ "question", "answer" ][][2],
{
questions: [
"What NoSQL technology should I use?",
{ "faq" : "What is the bottleneck in MapReduce?" }
]
}.questions[][2].faq
