Pass associative array to Javascript function

Question

How can I pass associative array in the below code. I dont wish to create a variable

uiDialog([MyURL,null,'GET'],false);

Some thing like this

 uiDialog([url:MyURL,data:null,method:'GET'],false);

I know I can do something like

var arr = new Array(5);
  arr["000"]="Rose";
  arr["4"]="Ltd";

And pass this array but I am not interested in that I want a one line code

UPDATE It seams there is no one line solution but if object is not a problem ie u cant use array function or length you can try this answer Pass associative array to Javascript function

Answer 1

 uiDialog({url:MyURL,data:null,method:'GET'},false);

Answer 2

var arr = new Array(3);
arr['url']=MyURL;
arr['data']=null;
arr['method']='GET';

uiDialog(arr,false);