Check key presence in Object in ActionScript?

Question

How to check if specific key is contained in associative array? I know I can loop over all keys but can I do single-step check?

Answer 1

myObject.hasOwnProperty("field")

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Example Code:

var dic:Object = new Object();
dic["field"] = "data";

trace (dic.hasOwnProperty("field")); //true
trace (dic.hasOwnProperty("nofield")); //false