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beranradek/sumpricesfor.scala

Created February 18, 2013 09:43
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sumpricesfor.scala
(for {
m <- models.view // vytvoří non-strict view pamatující si lazy vykonávané operace
if m.carMaker == CarMaker.Porsche
price <- m.price // transformace na kolekci obsahující ceny
} yield price).sum
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