Yes EIA is perfectly fine. I think Sasâ (or it might have been Dave) mentions that there is talk about it (HasDict) being deprecated once the performance of Map is tweaked.
Try the free first three lessons of https://www.codeschool.com/courses/try-elixir before reading PE, the bit on pattern matching is very good 
Don’t forget you can get 25% off both PE and EIA via your forum discount (see the competition sites for more info)
