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Small fix to make tailrec pi the same as other implementations

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Peter Vlugter 2011-04-08 16:40:41 +12:00
parent 3da35fb191
commit 63357fe3a8
1 changed files with 1 additions and 1 deletions
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akka-tutorials/akka-tutorial-first/src/main/scala/Pi.scala
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@ -73,7 +73,7 @@ object Pi extends App {
def calculatePiFor(arg: Int, nrOfElements: Int): Double = {
val end = (arg + 1) * nrOfElements - 1
@tailrec def doCalculatePiFor(cursor: Int, acc: Double): Double = {
if (end == cursor) acc
if (cursor > end) acc
else doCalculatePiFor(cursor + 1, acc + (4 * math.pow(-1, cursor) / (2 * cursor + 1)))
}
doCalculatePiFor(arg * nrOfElements, 0.0D)