Using local data
Topics: optics, JSON manipulation
Until this point we have focused on requesting data from a remote API. In some scenarios such requests are not possible or desirable, and a local data source is a better option. When you clone the repository for these exercises, you should find a pokemon-tcg-data submodule that contains a copy of the data for the remote API.
Targeting data with optics
The current implementation is extremely inefficient: it transforms every card in every .json file into a Card object, and then filters the results. A better solution is to perform the query directly on the JSON document, and only transform the data if it matches.