Created
October 9, 2018 21:16
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| /* From Scala | |
| trait M[A] { def flatMap[B](f: A => M[B]): M[B] } | |
| def unit[A](x: A): M[A] | |
| */ | |
| fun <A> A.unit(): A? = this | |
| fun <A, B> A?.flatMap(func: (A) -> B?): B? = | |
| if (this != null) func(this) else null |
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