michael@0: function testNewArrayCount()
michael@0: {
michael@0:   function count(a) { var n = 0; for (var p in a) n++; return n; }
michael@0:   var a = [];
michael@0:   for (var i = 0; i < 5; i++)
michael@0:     a = [0];
michael@0:   assertEq(count(a), 1);
michael@0:   for (var i = 0; i < 5; i++)
michael@0:     a = [0, , 2];
michael@0:   assertEq(count(a), 2);
michael@0: }
michael@0: testNewArrayCount();