find()とfileter()
<!DOCTYPE html>
<html>
<script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
<script>
$(function(){
var $li_list = $("li");
$li_list.filter(".foo").each(function(){
console.log($(this).html());
});
console.log("---");
$li_list.find(".foo").each(function(){
console.log($(this).html());
});
console.log("---");
$li_list = $("#list");
$li_list.filter(".foo").each(function(){
console.log($(this).html());
});
console.log("---");
$li_list.find(".foo").each(function(){
console.log($(this).html());
});
console.log("---");
});
</script>
<body>
<ul id="list">
<li class="foo">foo1</li>
<li class="">2</li>
<ul>
<li class="foo">foo2-1</li>
</ul>
<li class="foo">foo3</li>
</ul>
</body>
</html>
