Question

I need to have an instance of one common object in every other object, I have. I am doing modifications on the values of this object in every sub object I have.

For example. I have a map of tiles, and a bot moving over them in specific order. Each bot is marking tiles, which was already visited by him, as visited=true. But in general I don’t want main map to be changed…

I’ve tried to set up an example:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" 
    applicationComplete="complete()">
    <mx:Script>
        <![CDATA[
            private var array:Array = new Array( 1, 2, 3, 4);
            public function complete():void
            {
                trace("here " + array);
                var a:Array = array;
                a[0] = 100;
                trace("here " + array);
            }
        ]]>
    </mx:Script>
</mx:Application>

Can somebody help me to understand how do I copy for example the array, by value, (not by reference)

Answer 1

function clone ( arr:Array ):Array
{
    return arr.map( function( item:*, ..r ):*
        {
            return item;
        } );
}

edit:

Might contain some syntax errors…

public class MyObject
{
    private var arr:Array;
    private var bool:Boolean;

    // ...

    public function clone ():MyObject
    {
        var obj:MyObject = new MyObject();

        // clone values
        obj.arr = this.arr.slice();
        obj.bool = this.bool;

        return obj;
    }
}