Looping through an array in Flex

I’ve been trying out the new Flex development environment. But I get erroneous behavior when I try to loop through an array. I get an error in the following code:

var cockroachNames:Array = ["John Cockroach", "Simian CockRoach",...]
for (var name:String in cockroachNames) {
    hashMap.put(name, new CockRoach(name));
    hashMap.get(name).generate();
}