A simplest way to convert array to 2d array in scala

Question

I have a 10 × 10 Array[Int]

val matrix = for {
    r <- 0 until 10
    c <- 0 until 10
} yield r + c  

and want to convert the "matrix" to an Array[Array[Int]] with 10 rows and 10 columns.

What is the simplest way to do it?

Answer 1

val matrix = (for {
    r <- 0 until 3
    c <- 0 until 3
} yield r + c).toArray
// Array(0, 1, 2, 1, 2, 3, 2, 3, 4)

scala> matrix.grouped(3).toArray
// Array(Array(0, 1, 2), Array(1, 2, 3), Array(2, 3, 4))