HTML table data into arrays via jQuery

Question

I want to extract data from an html table like

<table>
    <tr>
        <th> Header1 </th>
        <th> Header2 </th>
        <th> Header3 </th>
    </tr>
    <tr>
        <td> Value 1,1 </td>
        <td> Value 2,1 </td>
        <td> Value 3,1 </td>
    </tr>

    ... rows ...

</table>

and get arrays:

an array for the headers

a 2d array for the column values (or an array for each column)

How can I do this using jQuery?

I don't care to serialize it, or put it into a JSON object because I want to use it to render a chart.

---

related General design question:

at the moment I have something like

1. ajax query returns html table
2. use jQuery to get values from html table
3. render chart

does it make more sense to throw a JSON object back from the ajax query and then render a table and a chart from there?

Answer 1

demo updated http://jsfiddle.net/ish1301/cnsnk/

var header = Array();

$("table tr th").each(function(i, v){
        header[i] = $(this).text();
})

alert(header);

var data = Array();

$("table tr").each(function(i, v){
    data[i] = Array();
    $(this).children('td').each(function(ii, vv){
        data[i][ii] = $(this).text();
    }); 
})

alert(data);

Answer 2

Something along the lines of:

var thArray = new Array();
var contentArray = new Array();

$('th').each(function(index) {
  thArray[index] =    $(this).html();
})


$('tr').each(function(indexParent) {
  contentArray['row'+indexParent] = new Array();
    $(this).children().each(function(indexChild) {
      contentArray['row'+indexParent]['col'+indexChild] = $(this).html();
    });
});

This gives you two arrays, thArray which is an array of your headings and contentArray which is a 2d array containing rows and columns: contentArray['row1']['col0'] returns " Value 1,1"

Actually, contentArray contains the th's as well... referenced 'row0'