6 lines
223 B
Scala
6 lines
223 B
Scala
val it: Iterator[Int] = Iterator.iterate((0, 1)) { case (a, b) => (b, a + b) }.map(_._1)
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def fib(n: Int): Int = it.drop(n).next()
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// example:
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println(it.take(13).mkString(",")) // prints: 0,1,1,2,3,5,8,13,21,34,55,89,144
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