How to find the index of a row in a table using jquery

Question

I\'m trying to find the index of a row in a table. I\'m trying to use the following code, but I seem to get an index of -1.

$(document).ready(function()
{
           


        

Answer 1

I've just found an interesting trick, which basically consists on counting the previous siblings:

var tr = $(some_selector);
var rowIndex = tr.prevAll().length;

This way you will get 0 if this is the first tr, 3 if this is the 4th tr, etc.

Just for the sake of it, another option using index(), which saves you from having to know how to select the containing table:

var rowIndex = tr.parent().children().index(tr);