Array of Arrays

Unity Engine
1

In Unity with Javascript I can make an array of arrays, where each of the arrays are of different sizes, but can someone tell me how to access the individual arrays?

var array1 : Array = [1, 2, 3, 4];
var array2 : Array = [5, 6, 7];
var array3 : Array = [8, 9, 10, 11, 12];

var arrayOfArrays : Array = [array1, array2, array3];

When I try the following:

for(var row : Array in arrayOfArrays){ }

I get the error on the for loop:

InvalidCastException: Cannot cast from source type to destination type.

Does someone know how to access the individual arrays in arrayOfArrays?

2

Are you sure you’re copying/pasting things correctly? Restated, is there something hidden/different in your actual code as your example works like a charm for me. For example:

function Start () {

  var array1 : Array = [1, 2, 3, 4];
  var array2 : Array = [5, 6, 7];
  var array3 : Array = [8, 9, 10, 11, 12];

  var arrayOfArrays : Array = [array1, array2, array3];

  for(var row : Array in arrayOfArrays){
  	Debug.Log(row[0]);
  } 
  
}

If I use that and hit play I see 1, 5, 8 in the Console window as expected.

3

You are right! I am investigating.

4

I had defined the arrays as:

var array1 : Vector3[ ] = [1, 2, 3, 4];

which produced the cast error. Once I changed the definition to how
I had stated the problem as

var array1 : Array = [1, 2, 3, 4];

then it worked fine as you noticed.

Sometimes just another pair of eyes helps. Thanks!

5

Awesome, I’m glad I could help! :slight_smile: