Dynamically arranging divs using jQuery

I have the following structure:

<div id="container">
<div id="someid1" style="float:right"></div>
<div id="someid2" style="float:right"></div>
<div id="someid3" style="float:right"></div>
<div id="someid4" style="float:right"></div>
</div>

Now someid is acually a unique id for that div. Now i receive an array which has a different order say someid 3,2,1,4, then how do i move these divs around to match the new order using jQuery?

Thankyou very much for your time.

Answers:

Answer

My plugin version - Working Demo

Takes an array and optional id prefix and reorders elements whose ids correspond to the order of (id prefix) + values inside the array. Any values in the array that don't have an element with the corresponding id will be ignored, and any child elements that do not have an id within the array will be removed.

(function($) {

$.fn.reOrder = function(array, prefix) {
  return this.each(function() {
    prefix = prefix || "";

    if (array) {    
      for(var i=0; i < array.length; i++) 
        array[i] = $('#' + prefix + array[i]);

      $(this).empty();  

      for(var i=0; i < array.length; i++)
        $(this).append(array[i]);      
    }
  });    
}
})(jQuery);

Code from the demo

jQuery

 $(function() {
  $('#go').click(function() {

    var order = $('#order').val() == ""? null: $('#order').val().split(",");
    $('#container').reOrder(order, 'someid');
  });
});

(function($) {

$.fn.reOrder = function(array, prefix) {
  return this.each(function() {
    prefix = prefix || "";

    if (array) {    
      for(var i=0; i < array.length; i++) 
        array[i] = $('#' + prefix + array[i]);

      $(this).empty();  

      for(var i=0; i < array.length; i++)
        $(this).append(array[i]);      
    }
  });    
}
})(jQuery);

HTML

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"></script>
<title>reOrder Demo</title>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<style type="text/css" media="screen">
body { background-color: #fff; font: 16px Helvetica, Arial; color: #000; }
div.style { width: 200px; height: 100px; border: 1px solid #000000; margin: 5px; }
</style>
</head>
<body>
<div id="container">
<div id="someid1" class="style" style="background-color:green;">div1</div>
<div id="someid2" class="style" style="background-color:blue;">div2</div>
<div id="someid3" class="style" style="background-color:red;">div3</div>
<div id="someid4" class="style" style="background-color:purple;">div4</div>
</div>
<p>Pass in a comma separated list of numbers 1-4 to reorder divs</p>
<input id="order" type="text" />
<input id="go" type="button" value="Re-Order" />


</body>
</html>
Answer

[Edit], This is tested and works:

var order = [3,2,1,4];
var container = $("#container");
var children = container.children();
container.empty();
for (var i = 0; i < order.length; i++){
    container.append(children[order[i]-1])
}

The i-1 is necessary since your ordering starts at 1 but arrays are indexed from 0.

Thanks to J-P and Russ Cam for making me look at it again.

Answer

Here's a jQuery-less solution:

function appendNodesById(parent, ids) {
    for(var i = 0, len = ids.length; i < len; ++i)
        parent.appendChild(document.getElementById(ids[i]));
}

appendNodesById(document.getElementById('container'),
    ['someid4', 'someid2', 'someid3', 'someid1']);
Answer

If you have all the content in the array then remove all the content from the wrapper div container in your code. then start adding the received divs one by one:

 var v = $(ar[0]).append(ar[1]).append(ar[2]);
 $("#container").html(v);   

If this does not works then look into this thread that discusses about positioning elements relative to other elements.

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