The goal was it to find the authors of a book in fileA.json and get their details in fileB.json
See:
https://twitter.com/JMHReif/status/1503851216740171784?s=20&t=4D2LUKLH9Kh5hCuTSxRlbw
https://twitter.com/JMHReif/status/1503851872096067585?s=20&t=4D2LUKLH9Kh5hCuTSxRlbw
Goal: Create an array of author ids from fileA. Depending on what is to be filtered from fileA.json, there are different approaches: