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11 lines
363 B
Kotlin
11 lines
363 B
Kotlin
tailRecursive fun <T, A> Iterator<T>.foldl(acc : A, foldFunction : (e : T, acc : A) -> A) : A =
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if (!hasNext()) acc
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else foldl(foldFunction(next(), acc), foldFunction)
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fun box() : String {
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val sum = (1..1000000).iterator().foldl(0) { (e : Int, acc : Long) ->
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acc + e
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}
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return if (sum == 500000500000) "OK" else "FAIL: $sum"
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} |