michael@0: function NPList() {}
michael@0: NPList.prototype = new Array;
michael@0: 
michael@0: var list = new NPList();
michael@0: list.push('a');
michael@0: 
michael@0: var cut = list.splice(0, 1);
michael@0: 
michael@0: assertEq(cut[0], 'a');
michael@0: assertEq(cut.length, 1);
michael@0: assertEq(list.length, 0);
michael@0: 
michael@0: var desc = Object.getOwnPropertyDescriptor(list, "0");
michael@0: assertEq(desc, undefined);
michael@0: assertEq("0" in list, false);