Pass a parameter to custom component - get null

Question

Main MXML (part of code):
<s:Application
xmlns:ns1="*"
creationComplete="init();>
import MyComponent;
private function init():void {
var myArray:Array=["FFF","TTT","RRR"];
myComp.width=200;
myComp.height=200;
myComp.getArray = myArray;
myContainer.rawChildren.addChild(myComp);
<fx:Declarations>
<ns1:MyComponent id="myComp" x="0" y="0" />
</fx:Declarations>
custom component:
package
          public var getArray:Array;
public class MyComponent extends Sprite { trace (getArray);//trace null

Answer 1

What is myContainer?
I have a working version with my container as UICOmponent inside main.
public class MyComp extends Sprite
        private var _getArray:Array;
        public function MyComp()
        public function get getArray():Array
            return _getArray;
        public function set getArray(value:Array):void
            trace("setter ", value);
            _getArray = value;
<?xml version="1.0" encoding="utf-8"?>
               xmlns:s="library://ns.adobe.com/flex/spark"
               xmlns:mx="library://ns.adobe.com/flex/mx"
               xmlns:ns1="*"
               minWidth="955" minHeight="600"
               creationComplete="init();">
    <fx:Script>
        <![CDATA[
            private function init():void {
                var myArray:Array=["FFF","TTT","RRR"];
                myComp.width=200;
                myComp.height=200;
                myComp.getArray = myArray;
                myContainer.addChild(myComp);
        ]]>
    </fx:Script>
    <fx:Declarations>
        <ns1:MyComp id="myComp"/>
    </fx:Declarations>
    <mx:UIComponent id="myContainer"/>
</s:Application>
Not sure this is what you after though but it traces:
setter  FFF,TTT,RRR
Why do you add to rawChildren?
C