jquery怎样提取一个含.good的.bd集？

Question

只要.bd下有.good都提取出来到jquery对象集合中去，怎么做？<script type="text/javascript" src="http://localhost/leb/auto/js/jquery-latest.js"></script>
<script type="text/javascript">
$(".bd")......         //怎么提取底层含有.good 这个class的所有.bd集合？
</script>
<div class="bd">
<div class="good">111</div>
</div>
<div class="bd">
<div class="bad">111</div>
</div>
<div class="bd">
<div class="nomal">111</div>
</div>
<div class="bd">
<div class="good">111</div>
</div>
<div class="bd">
<div>
<div class="good">111</div>
</div>
</div>

Answer 1

$(".bd").find(".good")
$(".bd .good")

Answer 2

$(".bd:has(.good)") 这个返回的是bool值。$(".bd").find(".good") 

Answer 3

楼上说错了。hasclass返回bool值$(".bd:has(.good)")  $(".bd").find(".good") 
这2个都可以