# Using multidimensional arrays and addChild

**URL:** <https://forum.kirupa.com/t/using-multidimensional-arrays-and-addchild/225554>\
**Category:** flash\
**Created:** [May 13, 2007, 6:59pm UTC](https://forum.kirupa.com/t/using-multidimensional-arrays-and-addchild/225554 "2007-05-13T18:59:37Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![costa](https://avatars.discourse-cdn.com/v4/letter/c/85f322/32.png) [@costa](https://forum.kirupa.com/u/costa)\
**Post date:** [May 13, 2007, 6:59pm UTC](https://forum.kirupa.com/t/using-multidimensional-arrays-and-addchild/225554/1 "2007-05-13T18:59:37Z")

</div>

Dear all,

I am trying to understand AS3 and to be honest it has been difficult for me, specially because I am not a programmer. As part of my learning process I wanted to understand how to attach movies from the library. Following some examples from here and from other forums I did this little experiment. Basically I am reading from a multidimensional array the names of the movies in the library and then I erase all them. I will appreciate if you tell me if I am doing it well and how I can improve it. This is the code.

import flash.utils.getDefinitionByName;  
[COLOR=“Red”]//Event for a button which will erase the instances[/COLOR]  
borrar.addEventListener(MouseEvent.MOUSE\_DOWN, borrarGrilla);  
[COLOR=“Red”]//Matriz is my multidimensional array[/COLOR]  
var matriz:Array = new Array ();  
matriz = [  
[“rojo”, “amarillo”, “azul”],  
[“amarillo”, “azul”, “rojo”],  
[“azul”, “rojo”, “amarillo”],  
[“rojo”, “amarillo”, “azul”],  
[“amarillo”, “azul”, “rojo”],  
[“azul”, “rojo”, “amarillo”],  
];  
[COLOR=“Red”]//contenedor is a container for the instances[/COLOR]  
var contenedor:Array = new Array();  
[COLOR="#ff0000"]//filas holds the rows [/COLOR]  
var filas:Array = new Array();  
[COLOR=“Red”]//nombre is the name of the new instance [/COLOR]  
var nombre:String;

[COLOR="#ff0000"]//Loop to get the name of the instances[/COLOR]  
for (var i:Number = 0; i \< 6; i++) {  
for (var j:Number = 0; j \< 3; j++) {  
nombre = matriz\*[j];  
crearTile(nombre,32_i,32_j,i,j);  
}  
contenedor \*= filas;  
filas=[];

};  
[COLOR="#ff0000"]//function to show the instances[/COLOR]  
function crearTile(nombre:String,xPos:Number,yPos:Number,fila:Number,col:Number):void {  
var tile:String = nombre;  
var classRef:Class = getDefinitionByName(tile) as Class;  
var instance:Object = new classRef();  
filas [j]=addChild(DisplayObject(instance)).name;  
instance.x= xPos;  
instance.y= yPos;

}  
[COLOR="#ff0000"]//Function to erase all the instances[/COLOR]  
function borrarGrilla(event:MouseEvent){  
for (var i:Number = 0; i \< 6; i++) {  
for (var j:Number = 0; j \< 3; j++) {  
nombre = contenedor\*[j];  
removeChild(DisplayObject(getChildByName(nombre)));  
}  
}  
}

Thanks in advance