michael@0: 
michael@0: function foo(x, n, y) {
michael@0:   var q = 0;
michael@0:   for (var j = 0; j < n; j++) {
michael@0:     if (x[j] < y)
michael@0:       q++;
michael@0:   }
michael@0:   assertEq(q, 1);
michael@0: }
michael@0: 
michael@0: var x = [1,2,3,4,5];
michael@0: var y = { valueOf: function() { x.length = 0; return 6; } };
michael@0: 
michael@0: var a = foo(x, 5, y);