How to add the value of arraybuffer

Question

For e.g.:

  val xs = List((1,ArrayBuffer(900.0, 400.0))
                (2,ArrayBuffer(2000.0, 800.0))
                (3,ArrayBuffer(1500.0, 600.0, 700.0, 1100.0)))

ArrayBuffer is growable.

How to add the values of ArrayBuffer?

Output should be look like:

 List((1, 1300.0)
      (2, 2800.0)
      (3, 3900.0))

How to write script in scala?

Chris Martin · Accepted Answer · 2015-08-14 10:11:30Z

5

List(
  (1, ArrayBuffer(900.0, 400.0)),
  (2, ArrayBuffer(2000.0, 800.0)),
  (3, ArrayBuffer(1500.0, 600.0, 700.0, 1100.0))
).map({ case (i, xs) => (i, xs.sum) })

// res0: List[(Int, Double)] = List((1,1300.0), (2,2800.0), (3,3900.0))

answered Aug 14, 2015 at 10:11

Chris Martin

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