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Jquery search not hiding first row in a table

I am having difficulty in understanding as to why my search of a table column is always showing the first row and the matched row after that? Even though the keyword doesn't match the cell in row 1 it will always show on top? I have gone through my code several times and tried different approach it still wont hide the first row?
Here is my working code
$('#filterbyname').on("keyup", function () {
var val = $(this).val();
var matches = $("table.bill tr:not(:first-of-type)");
matches.each(function (i,e) {
debugger;
$row = $(this);
$cells = $row.find("td:nth-child(2)");
$cells.each(function (i2, e2) {
var cell = $(this).text();
debugger;
$row.toggle(cell.indexOf(val) >= 0);
});
});
});
You can see from the above code if cell.indexOf(val) >= 0) then it will toggle according the matching rows.
Any suggestions please?

In fact in your matches variables you are using tr:not(:first-of-type) which selects all the rows expect the first one, because :not selector excludes all elements that matches :first-of-type here, which means that they are not the first child in their parent, so the first tr will be ignored.
Change this code:
var matches = $("table.bill tr:not(:first-of-type)");
To the following:
var matches = $("table.bill tr");

Jquery - check column checkboxes then do something with those rows

I've been trying to find a good match to my question, but nothing really concrete. I'm still learning and don't know exactly what I'm missing.
So my code can be found here: Fiddle
This is a simplified version of what I'm working with. In the final version, I will upload a csv file to the html table you see there (id="dvCSV"). Upon uploading, the table will look like it is shown (with added dropdowns and a column of checkboxes). The checkboxes come "pre-chcecked" when I generate them but what I want is the user to be able to turn "off" the rows that I do not want to calculate on.
I'll run you through the process:
This function reads the columns that the user designates. I don't know which column they will upload the data into.
function CheckLocations() {
//Checks the uploaded data for the locations of the Lat/Lon Data based on user dropdowns
colLocs[0] = ($('#Value_0 :selected').text());
colLocs[1] = ($('#Value_1 :selected').text());
colLocs[2] = ($('#Value_2 :selected').text());
colLocs[3] = ($('#Value_3 :selected').text());
LatColumn = colLocs.indexOf("Lat");
LongColumn = colLocs.indexOf("Long");
}
function AllTheSame(array) { //if they do not designate the checkboxes, I prompt them to
var first = array[0];
return array.every(function (element) {
return element === first;
});
}
This function takes all of the data in the designated columns and places them into an array for calculation.
function data2Array() {
//gets the lat and long data from the assigned columns and transfers them to an array for calculation
$("#dvCSV tr td:nth-child(" + (LatColumn + 1) + ")").each(function () {
var tdNode = $("<td/>");
tdNode.html(this.innerHTML);
LatData.push(tdNode.text());
});
LatData.splice(0, 2);
LatData.unshift(1, 1);
$("#dvCSV tr td:nth-child(" + (LongColumn + 1) + ")").each(function () {
var tdNode = $("<td/>");
tdNode.html(this.innerHTML);
LongData.push(tdNode.text());
});
LongData.splice(0, 2); //these two lines remove the first two items then replace them with 0
LongData.unshift(1, 1);
}
The first of these functions removes the checkbox column after calculations are done then new calculated columns are appended at the end. The second one was my attempt to read the checkboxes into an array. Ideally I'd want an array of values true or false, then do the calculations and return the calculated values back to the dvCSV table. For the td's where no calculation was performed, the cell would be empty.
function removeChecks() {
$("#dvCSV th:last-child, #dvCSV td:last-child").remove();
}
function makeCheckArray() {
var searchIDs = $("#dvCSV tbody td:last() input:checkbox:checked").map(function () {
return $(this).val();
}).get();
alert(searchIDs);
}
Hopefully I made the problem clear. Any help would be appreciated.

Pass a class when your table is generated into the tr element. Then create an on change method for your checkboxes. Read more here: http://api.jquery.com/on/
Also if you cannot get the inserted rows id's from your table then start a counter outside of your js like this
counter = 0;
Then inside of your loop add counter++
SO..
<tr class="row-1">
<td>
</td>
</tr>
Then add this snippet outside all of your other JS
$( "tr" ).on( "change", function() {
//do something
$(this+'.row-'+(counter)).hide();
});
This should get you headed in the right direction.

creating a 2 column table dynamically using jquery

I am trying to generate a table dynamically using ajax call. To simplify things i have just added my code to js fiddle here -> http://jsfiddle.net/5yLrE/81/
As you click on the button "HI" first two columns are created properly.. but some how as the td length reaches 2 . its not creating another row. The reason is that when i do find on the table elements its actually retrieving the children table elements. Can some one pls help.
I want a two column table.. Thank you.
sample code:
var tr = $("#maintable tbody tr:first");
if(!tr.length || tr.find("td:first").length >= max) {
$("#maintable").append("<tr>");
}
if(count==0) {
$("#maintable tr:last").append("<td>hi"+content+"</td>");
}

Basically the matching of descendants was allowing for great great grandchildren etc. Just needed to make the matching more specific.
JSFiddle: http://jsfiddle.net/TrueBlueAussie/5yLrE/91/
max = 2
$("button").click(function () {
var content = $('#template').html();
var $table = $("#maintable");
var tr = $table.find(">tbody>tr:last");
if (!tr.length || tr.find(">td").length >= max) {
// Append a blank row
tr = $("<tr>");
$table.append(tr);
}
tr.append("<td>hi " + content + "</td>");
});
This one always targets the last row and adds a row if it does not exists at all (or there are too many divs already) which is what I gather you intended.
I also used the templating I suggested to separate messy HTML strings from the code.

You will want to check the length of the table cells before incrementing a new table row. After you have reached your max column length, reset the row and start over.
JSFiddle
max_columns = 2;
count=0;
$("button").click(function() {
var content='column';
if(count==max_columns||!$('#maintable tr').length){
$("#maintable").append("<tr>");
count=0;
}
if(count!=max_columns)
$("#maintable tr:last").append("<td>"+content+"</td>");
else
$("#maintable tr:first").append("<td>"+content+"</td>");
count++;
});

Count number of elements with distinct name using jQuery or javascript

Suppose I have a form with 20 rows as shown in the figure below:
I'm naming the elements in the each row as:
1st row (Ambiance) -> v1[requirement], v1[observation], v1[status], v1[remarks]
2nd row (TV Room) -> v2[requirement], v2[observation], v2[status], v2[remarks]
3rd row (Cleanliness) -> v3[requirement], v3[observation], v3[status], v3[remarks]
.... and so on till 20th row
Using jquery or javascript can I find the number of rows present based on the names of the element? i.e., in this form name starts from v1 and ends at v20. So there are 20 rows.
UPDATE
The reason why I want the number of rows is because I plan to process the forms using:
for($i=1; $i<=$rowcount; $i++)
{
$v.$i = $_POST['v'.$i];
// then insert the first row into table and so on
}

If there is always a header row, then the number of rows will be the number of tr elements in the table -1, Eg.
var rowCount = $("#myTable tr").length -1;
This saves you having to use some convoluted method of attribute selector or string parsing.

This approach should work for you:
var rowCount = $("#data-table tr").filter(function() {
return $(this).find('[name^="v"]').length;
}).length;
This code will count only tose rows which have input with the name starting with v. I guess this is what you need.
Quick demo: http://jsfiddle.net/dfsq/2P5cN/
UPD
As per Mark Reed's comment we can make it even more simple:
var rowCount = $('#data-table tr').has('[name^=v]').length;

If you can't modify the markup at all, then you'll pretty much have to loop over everything and do your own counting. Something like this:
var tds = document.getElementsByTagName('td'); // or just $('td') for jQuery
var count_tds = tds.length;
var max = 0;
for (var i=0; i<count_tds; ++i) {
var td = tds[i]
var m = td.id.match(/^v(\d+)\[/)
if (m) {
if (m[1] > max) max=m[1]
}
}
Now max is the number of rows, assuming there are no extraneous elements with id's that match the pattern.
http://jsfiddle.net/usDD7/1/
EDIT Clearly I wasn't thinking with jQuery. See dfsq's answer for a much better solution (and my comment on that answer for a tiny improvement).

Get number of rows on specific datatables page?

I'm trying to get the count of the number of rows on the current dataTables page. If I do this:
alert($('.tableViewer tbody tr').length)
It gives me the a non-accurate row count (I think it adds the current page and the last one?).
Anyway, I'm just trying to get the row count on the page I'm actually on. Does anyone know how to do this?
Here's my delete button:
function fnDelete(elem){
if (selected.length>0) {
var c;
c = confirm('Are you sure you want to delete the selected ${displayTableName}?');
if (c) {
// Create delete url from editor url...
var deleteURL = (urlstr.substring(0, urlstr.lastIndexOf('/') + 1)) + "delete.do";
alert($('.tableViewer tbody tr').length)
deleteRecord(deleteURL,selected[0]);
alert($('.tableViewer tbody tr').length)
if ( $('.tableViewer tbody tr').length === 1) {
setTimeout(function() { oTable.fnPageChange('last'); }, 100);
}
}
}
}

The tr elements may be on the page, but not visible. Try this!
$('.tableViewer tbody tr:visible').length