Here’s a nice gotcha I found a while back when trying to run a filter on some XML data. If you write an attribute filter inside of a switch statement, the query will return null when you assign it to the XMLList variable. If you trace out the query instead of assigning it, it works fine.


switch (anything) {
case "testcase":
var xlData:XMLList = xmlData.Books.Book.(@author == 'Dickens');
break;
}

The above code will fail; apparently the scoping inside of switch statements is broken. There’s a bug report filed already, but it would be nice to see a fix for this.