Less : Finding index of column and apply styles - less

Question

I am new to less
What I am trying to achieve is, I want to give a class to th element and then want to apply the same styles for all the td having same index as the th. So basically I am trying to find out the index of th so that I can use :nth-child() for that index.
Is that possible with less?
Edit
So I am trying to achieve something like this
td:nth-child(#index_of_th_with_particular_class)
{
}

Answer 1

Hope you mean like this, please take a look at the sample pen
CSS & HTML
table {
border-collapse: collapse;
}
td {
padding: 5px;
border: 1px solid #ddd;
}
tr:nth-child(3) td {
background: yellow;
}
tr:nth-child(4) td:nth-child(5) {
background: red;
}
<div>
<table>
<thead></thead>
<tbody>
<tr>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
</tr>
<tr>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
</tr>
<tr>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
</tr>
<tr>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
</tr>
<tr>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
</tr>
<tr>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
</tr>
<tr>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
</tr>
<tr>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
</tr>
<tr>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
<td>Test data</td>
</tr>
</tbody>
</table>
</div>
LESS
table {
border-collapse: collapse;
}
td {
padding: 5px;
border: 1px solid #ddd;
}
tr {
&:nth-child(3) {
td {
background: yellow;
}
}
&:nth-child(4) {
td {
&:nth-child(5) {
background: red;
}
}
}
}