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?

`trace("age" in myarray); //will retrun true or false;` – mgraph Mar 22 '12 at 16:01 — mgraph, Mar 22 '12 at 16:01
`if( myarray["age"] != undefined )` will also work – divillysausages Mar 23 '12 at 23:02 — divillysausages, Mar 23 '12 at 23:02

Sam DeHaan · Accepted Answer · 2012-03-22T16:09:45.757

4

myObject.hasOwnProperty("field")

Example Code:

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

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

edited Mar 22 '12 at 16:09

answered Mar 22 '12 at 16:02

Sam DeHaan

1 Answers1