JQuery查找子元素find()和遍历集合each的方法积累

JQuery查找子元素find()和遍历集合each的方法积累

    1.HTML代码

<div name="students" school="HK">  
      <input type="boy" name="ZhangSan" value="206">  
      <input type="girl" name="Lisi" value="108">  
</div>

    2.jquery

<script type="text/javascript">  
    /* find() 查找子元素方法 */  
    var aaa = $("div[name='students'][school='HK']").find("input[type='boy'][name='ZhangSan']");  
    console.log(aaa.val());  
          
    /* $(".child",parent); 方法查找子元素*/  
    var bbb = $($("input[type='boy'][name='ZhangSan']"),$("div[name='students'][school='HK']"));  
    console.log(aaa.val());  
  
    /*  each()方法遍历数组 */  
    var arr = [ "one", "two", "three", "four" ];  
    $.each(arr, function() {  
        console.log(this);  
    });  
          
    /* each()方法处理json */  
     var obj = {  
           one : 1,  
           two : 2,  
           three : 3,  
           four : 4  
     };  
      $.each(obj, function(key, val) {  
         console.log(obj[key]);  
      });  
      
     /* each()方法处理二维数组 */  
       var arr1 = [ [ 11, 44, 33 ], [ 4, 6, 6 ], [ 7, 20, 9 ] ]  
       $.each(arr1, function(i, item) {  
           console.log(item[0]);  
       });  
  
     /* each()方法处理HTML元素 */  
      $("div[name='students'][school='HK'] > input").each(function() {  
           console.log($(this).val());  
      });  
 </script>