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read this book: http://raytracerchallenge.com/ http://raytracerchallenge.com/ I'm halfway through and at 1531 lines in Elixir including the tests via doctest :

read this book: http://raytracerchallenge.com/ http://raytracerchallenge.com/ I'm halfway through and at 1531 lines in Elixir including the tests via doctest :)