Try Dictionary
import flash.utils.Dictionary
private var streamDict:Dictionary = new Dictionary();
private function listenStream(user:String):void
{
var key:String = getKey(user);
var lastStream:NetStream = streamDict[key] as NetStream;
if (lastStream)
{
//close the last stream or do sth else
}
else
{
streamDict[key] = new NetStream(connection);
streamDict[key].play(user);
}
}
private function closeStream(user:String):void
{
var key:String = getKey(user);
//clear stream listener
var stream:NetStream = streamDict[key] as NetStream ;
if (stream)
{
stream.close();
}
//delete the stream
streamDict[key] = null;
delete streamDict[key];
}
private function getKey(user:String):String
{
return "inStream" + user;
}