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stasimus/play7.kt

Created October 9, 2018 21:19
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play7.kt
/*
Semigroup's mapN for Pair
*/
fun <A, B> Pair<A?, A?>.mapN(func: (A, A) -> B?): B? =
this.first?.let { a1 -> this.second?.let { a2 -> func(a1, a2) } }
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