Question

In ActionScript 3, is there any convenient way of determining if an associative array (dictionary) has a particular key?

I need to perform additional logic if the key is missing. I could catch the undefined property exception, but I’m hoping that can be my last resort.

Answer 1

var card:Object = {name:'Tom'};  trace('age' in card);  //  return false  trace('name' in card);  //  return true 

Try this operator : ‘in’