json 的循环输出

 1 var json = {'a':'apple','b':'banana','c':'orange','d':'pear'};
 2 for(var name in json){        
 3     console.log(name);// a b c d
 4     //打印的name值是字符串，所以用json['d']的方式输出
 5     console.log(json[name]);// apple banana orange pear
 6     // apple
 7     console.log(json.a);
 8     // pear
 9     console.log(json['d']);
10 }