Multidimensional arrays in Swift

Edit: As Adam Washington points out, as from Beta 6, this code works as is, so the question is no longer relevant.

I am trying to create and iterate through a two dimensional array:

var array = Array(count:NumColumns, repeatedValue:Array(count:NumRows, repeatedValue:Double()))

array[0][0] = 1
array[1][0] = 2
array[2][0] = 3
array[0][1] = 4
array[1][1] = 5
array[2][1] = 6
array[0][2] = 7
array[1][2] = 8
array[2][2] = 9

for column in 0...2 {
    for row in 0...2 {
        println("column: \(column) row: \(row) value:\(array[column][row])")
    }
}

However, this is the output I get:

column: 0 row: 0 value:3.0
column: 0 row: 1 value:6.0
column: 0 row: 2 value:9.0
column: 1 row: 0 value:3.0
column: 1 row: 1 value:6.0
column: 1 row: 2 value:9.0
column: 2 row: 0 value:3.0
column: 2 row: 1 value:6.0
column: 2 row: 2 value:9.0

It looks as if the last column in the row is overwriting the other column values.

Am I declaring it wrong?

Edit: Perhaps a picture from the Playground would help:

Captured from Playground


As stated by the other answers, you are adding the same array of rows to each column. To create a multidimensional array you must use a loop

var NumColumns = 27
var NumRows = 52
var array = Array<Array<Double>>()
for column in 0..NumColumns {
    array.append(Array(count:NumRows, repeatedValue:Double()))
}

var array: Int[][] = [[1,2,3],[4,5,6],[7,8,9]]

for first in array {
    for second in first {
        println("value \(second)")
    }
}

To achieve what you're looking for you need to initialize the array to the correct template and then loop to add the row and column arrays:

var NumColumns = 27
var NumRows = 52
var array = Array<Array<Int>>()
var value = 1

for column in 0..NumColumns {
    var columnArray = Array<Int>()
    for row in 0..NumRows {
        columnArray.append(value++)
    }
    array.append(columnArray)
}

println("array \(array)")

For future readers, here is an elegant solution(5x5):

var matrix = [[Int]](repeating: [Int](repeating: 0, count: 5), count: 5)

and a dynamic approach:

var matrix = [[Int]]() // creates an empty matrix
var row = [Int]() // fill this row
matrix.append(row) // add this row