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gclaramunt/Sumatoria y Productoria.scala

Created December 13, 2010 13:34
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Sumatoria y Productoria.scala
def ∑(r:Range)(f:Int =>Int)=r.reduceLeft(_+ f(_))
def ∏(r:Range)(f:Int =>Int)=r.reduceLeft(_* f(_))
// And now we can write:
val s= ∑(1 to 100)(x=>x^2)
val p= ∑(1 to 100 by 2)(x=>x^2)
val y= ∏(1 to 30 by 3)(_)
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