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polyglotpiglet/FunctorDefinition.scala

Last active April 5, 2020 09:26
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FunctorDefinition.scala
/*
Functor Laws:
1. Identity
fa.map(a => a) == fa
2. Composition
fa.map(f).map(g) = fa.map(g(f(_)))
*/
trait MyFunctor[F[_]] {
def map[A, B](fa: F[A], f: A => B): F[B]
}
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