michael@0: var a = ['p', 'q', 'r', 's', 't'];
michael@0: var o = {p:1, q:2, r:3, s:4, t:5};
michael@0: for (var i in o)
michael@0:     delete o[i];
michael@0: for each (var i in a)
michael@0:     assertEq(o.hasOwnProperty(i), false);
michael@0: