https://ruby-doc.org/stdlib-2.4.0/libdoc/csv/rdoc/CSV.html
https://www.sitepoint.com/guide-ruby-csv-library-part/
http://technicalpickles.com/posts/parsing-csv-with-ruby/
In Ruby, you can import your CSV file either at once (storing all of the file content in memory) or read from it row-by-row.
Either way you do it, Ruby will store each table row as an array, with each cell being a string element of the array.
