Please help me on this one.

Creating a multi dimensional array is exactly the same as creating a regular one, but with a number of arrays instead of a number of values. Recall that a normal array would look like this:

          [1, 2, 3]

Meaning that the simplest array of arrays should look like this:

          [ [1], [2], [3] ]

And that your array should look like this:

         [ [10,20], [4,0], [0,0], [3,10] ]

Hi there,

I think the problem is that you are missing comma between your inner arrays.

Simple, empty array will be:

var myArray = []

array with one array (with one item in it):

var myArray = [
[1]
]

Now let's add another array to our myArray with no item:

var myArray = [
[1],
[]
]

NOTE: I used comma to separate inner arrays!

Let's put four numbers to our inner empty array:

var myArray = [
[1],
[1, 2, 3, 4]
]

As yo can see comma is also used for separating elements inside array. It doesn't really matter if this elements are nubers or other arrays.

If I want one array with four arrays in it, and each inner arrays has like 5 numbers, this what would I do:

var myArray = [
[1, 7, 8, 9, 10],
[1, 2, 3, 4, 5],
[0, 0, 0, 0, 0],
[11, 111, 22, 222, 55]
]

Please notice that last item in array is not ended with comma. But in new ECMA script even comma after last element should cause no problem :)

So in the end my code look like this:

var coordinates = [
  [1,2],
  [2,3],
  [3,4],
  [4,5]
]

I hope that helps!

Cheers!

BR,

Jarek

Thank you very much, Dann and Jaroslaw.