環流式json_encoded數據

Question

嘿我有我嘗試循環和顯示輸出，但它不工作一個json_encode，我沒有得到任何輸出=/

這是我JS提琴： http://jsfiddle.net/Z4jTc/1/

可不可以有一個人解釋爲什麼它不會循環？

代碼：

var messages = {"1":["2","1","0000-00-00 00:00:00","testing once"],"2":["2","1","0000-00-00 00:00:00","testing twice :)"]}; 

    for(var id in messages){ 

      var read = messages[id][0]; 
      var from = messages[id][1]; 
      var sent_on = messages[id][2]; 
      var content = messages[id][3]; 

      document.write = 'test'; 
      document.write = '<div class="message_info">'; 
      document.write = '<b>From:</b> '+from+'<br/><br/>'; 
      document.write = '<b>Sent On:</b> '+sent_on; 
      document.write = '</div><div class="message_content">'; 
      document.write = content; 
      document.write = '</div> <br/><br/>'; 

    }​ 

Answer 1

這麼多文件撰寫的很慢。你可以做到這一點在一個叫你解析對象後：

var messages = {"1":["2","1","0000-00-00 00:00:00","testing once"],"2":["2","1","0000-00-00 00:00:00","testing twice :)"]}; 
var output = []; 
for(var id in messages){ 

    var read = messages[id][0]; 
    var from = messages[id][1]; 
    var sent_on = messages[id][2]; 
    var content = messages[id][3]; 

    output.push('test'); 
    output.push('<div class="message_info">'); 
    output.push('<b>From:</b> '+from+'<br/><br/>'); 
    output.push('<b>Sent On:</b> '+sent_on); 
    output.push('</div><div class="message_content">'); 
    output.push(content); 
    output.push('</div> <br/><br/>'); 
}​ 

document.write(output.join('')); 

...或者放置在頁面上的容器輸出...

document.getElementById('destinationContainer').innerHTML(ouput.join('')); 

Answer 2

你都在不斷改寫document.write功能，你從來沒有真正調用它。

document.write("test"); 

是它應該如何使用。

Answer 3

document.write是一個功能

使用

document.write('test'); 

而不是

document.write = 'test'; 

見http://jsfiddle.net/Z4jTc/2/