Use jQuery.each to loop all your td's:

$("td").each(function() {
    var id = $(this).attr("id");

    // compare id to what you want
});

var all_td_in_a_table = $("#table-id td"),

then you can do a loop

$('#tableId').find('tr').each(function () {
 $(this).find("td[id^='tdId']").each(function (i, item) {
      //do your task here
        });
 });

Or the effective one is get all the tds from table first

var totalTdsInTable = $("#table-id td");

Now loop through totalTdsInTable