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iboss-ptk/fold.scala

Last active January 31, 2016 06:12
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fold.scala
val accumulatingList = numbers
.foldLeft(List[Int]())((acc, curr) =>
if(!acc.isEmpty) acc :+ (acc.last + curr) else acc :+ curr)
// => List(1, 3, 6, 10, 15)
def contains(numbers: List[Int], target: Int) =
numbers.foldLeft(false)((acc, curr) => if(curr == target) true else acc || false)
contains(numbers, 4) // => true
contains(numbers, 20) // => false
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