深度克隆一个对象

 1 function cloneObject( obj ) {
 2         var str = ‘‘;
 3         var newObj = obj.constructor === Array ? [] : {};
 4 
 5         if ( typeof obj !== ‘object‘) {
 6             return ;
 7         } else if( window.JSON) {
 8             str = JSON.stringify(obj);
 9             newObj = JSON.parse(str);
10         } else {
11             for ( var i in obj ) {
12                 newObj[i] = typeof obj[i] === ‘ object ‘ ? arguments.callee.call( obj[i] ) : obj[i];
13             }
14         }
15         return newObj;
16     }
17 
18 //for test
19 var p = [1, ‘2‘, [0, 1, 2], {a: 0, b: 1, c: 2}];
20 //clone
21 var np = cloneObject(p);
22  console.log(obj, arr, newobj, newarr, np);