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HackerRank.com

• dmgbrn 11y ago
  I found their functional programming series to be a good way to get acquainted with Haskell -- problems start with basic operations, move on to recursion, lists, other data structures, and so on. As early as the recursion section we see some neat challenges: for example, write a program that prints an ASCII art version of the Serpinski triangle to a given depth.