1 <script type="text/javascript">
2 /*反射*/
3 typeof flight.number //'number'
4 typeof flight.status //'string'
5 typeof flight.arrival //'object'
6 typeof flight.manifest //'undefined'
7
8 typeof flight.toString //'function'
9 typeof flight.constructor//'function'
10
11 flight.hasOwnProperty('number') //true
12 flight.hasOwnProperty('constructor')//false
13
14 /*减少全局变量的污染*/
15 全局变量削弱了程序的灵活性，尽量避免
16 var Mapp={};
17 Mapp.stooge={
18 "first-name":"Joe",
19 "last-name":"Howard"
20 };
21 Mapp.flight={
22 airline:"Oceanic",
23 number:815,
24 departure:{
25 IATA:"SYD",
26 time:"2004-09-22 14:55",
27 city:"Sydney"
28 },
29 arrival:{
30 IATA:"LAX",
31 time:"2004-09-23 10:42",
32 city:"Los Angeles"
33 }
34 };
35 </script>
