jQuery remove an object and replace in same spot

How would I go about removing an object say from an unordered list and add it to another list while keeping开发者_开发技巧 its location? I know i can set the original item to hide() but then that leaves a small space where the item use to appear. Say i have a list A and B, if a user clicks on an item in A it needs to be added to B and removed from A. If they now click on a button to remove it from B and back to A, i want to have it displayed in the same spot it originally did. I know i can add it via append() but that won't put it in the same location. Thoughts anyone?

You could use .clone? so:

<ul id="firstlist">
    <li>One</li>
    <li>Two</li>
    <li>Three</li>
    <li>Four</li>
</ul>

<ul id="secondlist">
    <li>One</li>
    <li>Two</li>
    <li>Three</li>
</ul>

the jquery:

var object = $('#firstlist > li :last ').clone();
$('#secondlist').append(object);
$('#firstlist > li :last ').destroy();

Obviously you can swap this round to add it to the first list, but to get the position you could use a number of ways, I would probably do:

$('#firstlist').children('li').each(function(i){

});

and use "i" to get the position. you can append after a given object to so:

$('#firstlist').children('li').each(function(i)
 { if(i== 4){ $(this).append(object).after(this) }

Heres my bid:

• Allows you to click an element in list-1 and it will hide that instance, and append a clone to list-2.
• Clicking the item in list-2 will return it back to list-1, in the same position it came from.
• Clicking "original elements" in list-2 will not copy over to list-1.

HTML:

<ul id="list-1">
  <li>One</li>
  <li>Two</li>
  <li>Three</li>
  <li>Four</li>
  <li>Five</li>
</ul>
<ul id="list-2"></ul>

JavaScript:

var $list1 = $('#list-1');
var $list2 = $('#list-2');
$list1.children('li').each(function(i,e){
    var ulId = $(this).closest('ul').attr('id');
    $(this).attr('li-id',ulId+'_'+i);
}).click(function(e){
    if ($list2.find('li[li-id="'+$(this).attr('li-id')+'"]').length == 0){
        var liClone = $(this).clone();
        liClone.click(function(e){
            var elId = $(this).attr('li-id');
            $list1.find('li[li-id="'+elId+'"]').show();
            $(this).remove();
        });
        $list2.append(liClone);
    }
    $(this).hide();
});

Fiddle: http://www.jsfiddle.net/vgx23/1/