JavaScript for in语句

feiyang10086

JavaScript for in语句

Js代码

1. 1.var tom = {name: 'Tom', gender: 'Male', age: 17};   
   
2. 2.for (att in tom) {   
   
3. 3.    alert('tom.' + att + ' = ' + tom[att]);   
   
4. 4.}   
   
5. 5.  
   
6. 6.var protocols = ['HTTP', 'FTP', 'SMTP'];   
   
7. 7.for (index in protocols) {   
   
8. 8.    alert('protocols[' + index + '] = ' + protocols[index]);   
   
9. 9.}  
   
10. var tom = {name: 'Tom', gender: 'Male', age: 17};
    
11. for (att in tom) {
    
12.         alert('tom.' + att + ' = ' + tom[att]);
    
13. }
    
14. 
    
15. var protocols = ['HTTP', 'FTP', 'SMTP'];
    
16. for (index in protocols) {
    
17.         alert('protocols[' + index + '] = ' + protocols[index]);
    
18. }
    
19.   

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