repeat all json data by means of useage of jquery's each function

这里来使用each方法来遍历json对象的数据

var comments = [
  {
    "username": "张三",
    "content": "沙发."
  },
  {
    "username": "李四",
    "content": "板凳."
  },
  {
    "username": "王五",
    "content": "地板."
  }
];



var html = '';
  $.each( comments , function(commentIndex, comment) {
      html += '<div class="comment"><h6>' + comment['username'] + ':</h6><p class="para">' + comment['content'] + '</p></div>';
  })



$('#resText').html(html);

说明: each在每次执行函数时，都会给函数传递一个表示作为执行环境的元素在匹配的元素集合中所处位置的数字值作为参数。这里所指的则为 
commentIndex, 而每一个commentIndex所对应的值则为comment, comment则为其中一个json对象,即如
{
    "username": "张三",
    "content": "沙发."
  }










又如如下的方式,使用 点访问符的方式来进行访问

 





      $('#send').click(function() {
            $.ajax({
              type: "GET",
              url: "http://api.flickr.com/services/feeds/photos_public.gne?tags=car&tagmode=any&format=json&jsoncallback=?",
              dataType: "jsonp",
              success : function(data){
                          $.each(data.items, function( i,item ){
                                $("<img class='para'/> ").attr("src", item.media.m ).appendTo("#resText");
                                if ( i == 3 ) { 
                                    return false;
                                }
                          });
                  }
            }); 
        });