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  1. Practice
  2. Functional Programming
  3. Introduction
  4. Functions or Not?
  5. Discussions

Functions or Not?

  • wirefox + 1 comment

    HackerRank tells you all you need to know about the input, so it's a completely different situation from an arbitrary CLI. This approach works for the type of problems on this particular site, and for the typical use case where input comes from a terminating program or a file.

    It actually won't run forever because of a handy thing called EOF.

    Nice idea about the type sig, though.

    • matthias_a + 1 comment

      how would you write 

      ms <- forM [1..n] $ const $ getLine
let d = M.fromList $ (\[x,y] -> (x,y)) . words <$> ms

      on one line?

      • wirefox + 0 comments
        d <- M.fromList <$> map ((\[x,y] -> (x,y)) . words) <$> replicateM n getLine