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akhileshs/gist:f9606d90035e8396d707

Created April 3, 2015 13:04
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gistfile1.scala
scala> trait Functor[F[_]] { self =>
| def map[A, B](fa: F[A])(f: A => B): F[B]
| // lift f to F and apply on F[A]
| // ...
| }
defined trait Functor
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