How to detect the return type in actionscript

Question

I have a an event handler (event:ResultEvent) that could return 1 of 2 types. Does actionscript3 have a function to test the type returned? something like

if (type(event.result) == ProxyObject) {
  // do something
} else {
  // do something else
}

Answer 1

You should be able to use

if (event.result is ProxyObject) {}

More details are here.