Convert Array [Array [Double]] to Array [Double]

Question

How can I convert an array of arrays of paired numbers to an array of arrays of doubles using Scala 2.10.4?

Convert: Array[Array[Double]] => Array[Double]

Answer 1

Use flatten:

val r: Array[Double] = doubleDouble.flatten

Answer 2

You can write something like the following:

val src = Array(Array(1.2,3.4), Array(5.6, 7.8))

val result = for {
a <- src
b <- a
} yield b