Sorting function in javascript

Question

Hi I have html structure with table. I want to sort td according to their value. I trying it but cant find the logic to make it happen. My function is

<head>
<script type="text/javascript">
function sorting(){
    var sortvalue= document.getElementsByTagName('td');
    for(i=0; i<sortvalue.length;i++){
        var val= sortvalue[i].value
        }
    }


</script>

</head>

<body>

<table width="500" border="0" cellspacing="0" cellpadding="0">
  <tr>
    <td>5</td>
  </tr>
  <tr>
    <td>3</td>
  </tr>
  <tr>
    <td>2</td>
  </tr>
  <tr>
    <td>4</td>
  </tr>
    <tr>
    <td>1</td>
  </tr>


</table>

<a href="#" onclick="sorting()">click to sort</a>
</body>

if you're using a js library, there most definitely are plugins that will sort tables for you. — chovy
– chovy, Commented Sep 13, 2012 at 6:22
I wrote a reply awhile ago which might include useful links for such "dynamic" tables with sorting and stuff. — user166390
– user166390, Commented Sep 13, 2012 at 6:26

Rhyono · Accepted Answer · 2012-09-13 06:28:41Z

1

If you plan to do more than just organize those numbers: those saying you should use a plugin are correct. It'd take more effort than it's worth to try to make your own table sorter.

If all you want to do is sort those numbers (small to large):

function sorting() {
    td = document.getElementsByTagName("td");
    sorted = [];
    for (x = 0; x < td.length; x++)
        sorted[x] = Number(td[x].innerHTML);
    sorted.sort();
    for (x = 0; x < sorted.length; x++) 
        td[x].innerHTML = sorted[x];
}

Largest to smallest:

function sorting() {
    td = document.getElementsByTagName("td");
    sorted = [];
    for (x = 0; x < td.length; x++)
        sorted[x] = Number(td[x].innerHTML);
    sorted.sort().reverse();
    for (x = 0; x < sorted.length; x++) 
        td[x].innerHTML = sorted[x];
}

answered Sep 13, 2012 at 6:28

Rhyono

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Comments

okcoker · Accepted Answer · 2012-09-13 06:27:21Z

1

Assuming that you're putting the script under your link, or adding it on domready:

function sorting(){

    var tbl = document.getElementsByTagName('table')[0];
    var store = [];
    for(var i=0, len=tbl.rows.length;i<len; i++){
        var row = tbl.rows[i];
        var sortnr = parseFloat(row.cells[0].textContent || row.cells[0].innerText);
        if(!isNaN(sortnr)) store.push([sortnr, row]);
    }
    store.sort(function(x,y){
        return x[0] - y[0];
    });
    for(var i=0, len=store.length; i<len; i++){
        tbl.appendChild(store[i][1]);
    }
    store = null;
}

link here: http://jsfiddle.net/UMjDb/

answered Sep 13, 2012 at 6:27

okcoker

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Comments

kennebec · Accepted Answer · 2012-09-13 06:38:14Z

For your example you can make an array of the cell data from the node list and sort that array, and then replace the cells data with the sorted data. Simpler than moving elements.

<head>
<script type= "text/javascript">
function sorting(){
    var T= [], tds= document.getElementsByTagName('td');
    for(var i= 0;i<tds.length;i++){
        T.push(tds[i].firstChild.data);
    }
    T.sort(function(a, b){
        return a-b
    });
    for(var i= 0;i<tds.length;i++){
        tds[i].replaceChild(document.createTextNode(T[i]), tds[i].firstChild);
    }
}
</script>
</head>
<body>
<table width= "500" border= "0" cellspacing= "0" cellpadding= "0">
<tr>
<td>5</td>
</tr>
<tr>
<td>3</td>
</tr>
<tr>
<td>2</td>
</tr>
<tr>
<td>4</td>
</tr>
<tr>
<td>1</td>
</tr>
</table>
<a href= "#" onclick= "sorting()">click to sort</a>
</body>

TheFoxLab · Accepted Answer · 2012-09-13 07:16:46Z

1

i giving a jquery solution, hope this post helps you.

var tdData = Array();
$(document).ready(function(){
    $('td').each(function(i){
   tdData [i] = $(this).text();
   });  
});

function sorting(){
   var sortedData = tdData.sort();
    $('td').each(function(i){
  $(this).text(sortedData[i]);
  } ); 
}

complete solution: link

edited Sep 13, 2012 at 7:16

answered Sep 13, 2012 at 7:07

TheFoxLab

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Comments

Willem Mulder · Accepted Answer · 2012-09-15 08:17:57Z

1

step 1: find all td's
step 2: fetch their values
step 3: sort them on their values
step 4: put them back into their parent in the correct order. This can simply be done with an $(parent).html("").append(sortedNodes) (if you use jQuery that is).

As @FelixKling points out below, the .html("") is not strictly necessary other than for code clarity since "If you have nodes that already exist in the tree, then .append will remove them first from their current location and add them to the new parent"

edited Sep 15, 2012 at 8:17

answered Sep 13, 2012 at 6:31

Willem Mulder

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3 Comments

Felix Kling Over a year ago

(a) $(parent).html("").append(sortedNodes) is jQuery (which is not mentioned here) (b) $(parent).append(sortedNodes) suffices ;)

Willem Mulder Over a year ago

(a) true, included that in the answer. (b) not true, since we want to set the sortedNodes instead of the current nodes, and not in addition to the current nodes :)

Felix Kling Over a year ago

If you have nodes that already exist in the tree, then .append will remove them first from their current location and add them to the new parent.

3on · Accepted Answer · 2012-09-13 06:21:49Z

0

You need to re-organise the table. The simplest approach would be to use a plugin like this one for jQuery

You need to modify the DOM, they would be different way to do that, like grabbing all the data, removing all the rows and adding them back in the right order.
It could be improved better using detach and reattaching.

answered Sep 13, 2012 at 6:21

3on

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