Created
March 29, 2017 12:54
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| sealed class Option<out A> { | |
| object None : Option<Nothing>() | |
| data class Some<out A>(val value: A) : Option<A>() | |
| inline fun <B> map(f: (A) -> B): Option<B> = when (this) { | |
| is None -> this | |
| is Some -> Some(f(value)) | |
| } | |
| } |
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