jQuery计算父母中最大的孩子数

Question

I'd appreciate help on the following problem: Let's say I have a number of ul elements on a page, each with a number of li children, eg

<ul>
    <li></li>
    <li></li>
</ul>
<ul>
    <li></li>
    <li></li>
    <li></li>
</ul>

What would be the best way to find the highest number of children across all ul parents (In the example above, it should return 3 )?

Many thanks, Ch

Answer 1

You just need this:

var high = Math.max.apply(null, $('ul').map(function () {
    return $(this).children().length;
}).get());
alert(high);

DEMO

Answer 2

You can easily check how many li elements ul containing by checking length

Try FIDDLE

var highest='0';
$('ul').each(function(){
  var elem=$(this).find('li').length; 
  if(elem >= highest)
     highest=elem;
});

alert("Highest no. of li elements is "+highest);