Unity3D – Multidimensional Arrays – Jagged Arrays

Unity3D – Multidimensional Arrays – Jagged Arrays

One Dimensional Array

A 1D (one dimensional) Array is something like that:

var strings = ["First string", "Second string", "Third string"];

or if you want:

// Array Start
var mycars = new Array();
mycars[0] = "Saab"; // Notice: the first value is 0
mycars[1] = "Volvo";
mycars[2] = "BMW";
// Array End

Debug.Log(mycars[0]); // Result is Saab

Notice the index inside square brackets [i], has only one dimension.

Try to think about a line:

[0] [1] [2]

OR

[Saab] [Volvo] [Bmw]

Multidimensional Array

A Multidimensional Array has a two dimensional grid coordinated to store variables.

A Multidimensional Array is always rectangular!

Example ONE:

#pragma strict
 
public var multiDimensionalArray: int[,] = new int[2,2]; // 2x2 -> 4 cells
 
function Start () {
 
// Array Values
multiDimensionalArray[0,0] = 10;
multiDimensionalArray[0,1] = 20;
multiDimensionalArray[1,0] = 30;
multiDimensionalArray[1,1] = 40;

Debug.Log(multiDimensionalArray[0,1]); // Result is 20
  
}// END Start()

NOTICE new int[2,2]; -> it means 4 cells

Try to think about a grid with 2D coordinates, the 4 cells are:

[0,0][0,1]
[1,0][1,1]

OR

[10][20]
[30][40]

Example TWO:

#pragma strict
 
public var multiDimensionalArray: int[,,] = new int[2,2,2]; 
 
function Start () {
 
// Array Values
multiDimensionalArray[0,0,0] = 10;
multiDimensionalArray[0,0,1] = 20;
multiDimensionalArray[0,1,0] = 30;
multiDimensionalArray[0,1,1] = 40;
multiDimensionalArray[1,0,0] = 50;
multiDimensionalArray[1,0,1] = 60;
multiDimensionalArray[1,1,0] = 70;
multiDimensionalArray[1,1,1] = 80;

Debug.Log(multiDimensionalArray[1,0,1]); // Result is 60
  
}// END Start()

Jagged Array (Matrici Irregolari o Array ‘Frastagliati’)

A Multidimensional Array is always rectangular, in a Jagged Array, each of the ‘rows’ is a different length

#pragma strict
 
public var myJaggedlArray = [
[0,1,1,0],
[1,0,0,1],
[1,0,0,1],
[0,1,1,0]
];
 
function Start () {
  
}// END Start()