michael@0: var obj = {s: ""};
michael@0: var name = "s";
michael@0: var a = [];
michael@0: for (var i = 0; i <= 13; i++) {
michael@0:     a[i] = 'x';
michael@0:     if (i > 8)
michael@0:         a[i] = ++obj[name];  // first recording changes obj.s from string to number
michael@0: }
michael@0: assertEq(a.join(','), Array(10).join('x,') + '1,2,3,4,5');
michael@0: assertEq(obj.s, 5);
michael@0: