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deiga/unfoldr.kt

Created October 22, 2017 12:42
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Kotlin unfoldr
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unfoldr.kt
fun <T,R> unfoldRight(f: (T) -> Pair<R, T>?, b: T): List<R> {
val maybePair: Pair<R, T>? = f(b)
return if ( maybePair == null) {
listOf()
} else {
listOf(maybePair.first) + unfoldRight(f, maybePair.second)
}
}
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