Docker is a very useful tool for modern web development. It allows you encapsulate a computation with the operating system and associated libraries. In principle allowing you to worry less about implicit dependencies that you have on your code, as they must made clear by the docker file.

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Just some from the first chapter of the online version of Learn you a Haskell.

1 Starting Out

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  • make prompt prettier using :set prompt "ghci> "
  • 50 * -1 is an error, must do `50 * (-1)'. It seems to me that this is something to do with how whatever Haskell equivalent …