A great comparison to the above article is this post by Stephen Diehl, "Reflecting on Haskell in 2015". [0] A great read and an interesting pointer on the state of Haskell / Javascript (Elm, Purescript). Also, work your way through "Write you a Haskell", [1] well worth the effort.
Going through the post, this looks like a comprehensive book. Read the rationale behind, 'how to learn Haskell' from author. [2]