I need to sum values in a two column table, where for each row if col2 is not blank, add it to the total, else instead add col1. Then publish the total to a div
Below is what I've tried but it outputs blank.
var table = document.getElementById("PLTable");
var cost_est = document.getElementsByClassName("cost_estimate");
var act_cost = document.getElementsByClassName("act_cost");
var sum2 = 0;
for (var i = 0, row; row = table.rows[i]; i++) {
if (act_cost[i].innerText>0) {
sum2 += act_cost[i].innerText;
}
else {
sum2 += cost_est[i].innerText;
}
}
document.getElementById("cost_projected_total").innerHTML = sum2
<!--HTML data looks like this:-->
<table id="PLTable">
<thead>
<tr>
<th>cost estimate</th>
<th>cost actual</th>
</tr>
</thead>
<tr>
<td class = "cost_estimate">100</td>
<td class = "act_cost"></td>
</tr>
<tr>
<td class = "cost_estimate">100</td>
<td class = "act_cost">50</td>
</tr>
</table>
<div id="cost_projected_total">
</div>
Correct output should be sum2 = 150 & that result should be output inside the div.
Any ideas?
There are some points to address in your code.
I will try to summarize what was wrong and how it should be change:
table.rows actually loops the head as well, so your index would go out of bounds.
innerText returns a text, so you first need to conver that value to a Number first, otherwise it will concatenate the strings.
So, basically, what I did to keep your code as it currently was is:
added a tbody
changed table.rows to the count of the tbody rows.
Acquired both numeric values of the looped items.
Below is the working code with the mentioned changes and fixes, it could've been way shorted, I just want to keep the code as close to your so that you can understand where and what was wrong, without necessarely relying on an optimal solution.
var table = document.getElementById("PLTable");
var tbody = table.getElementsByTagName('tbody')[0];
var cost_est = document.getElementsByClassName("cost_estimate");
var act_cost = document.getElementsByClassName("act_cost");
var sum2 = 0;
for (var i = 0; i < tbody.getElementsByTagName('tr').length; i++) {
var row_act_cost = Number(act_cost[i].innerText);
var row_cost_est = Number(cost_est[i].innerText);
if (row_act_cost > 0) {
sum2 += row_act_cost;
}
else {
sum2 += row_cost_est;
}
}
document.getElementById("cost_projected_total").innerHTML = sum2;
<table id="PLTable">
<thead>
<tr>
<th>cost estimate</th>
<th>cost actual</th>
</tr>
</thead>
<tbody>
<tr>
<td class = "cost_estimate">100</td>
<td class = "act_cost"></td>
</tr>
<tr>
<td class = "cost_estimate">100</td>
<td class = "act_cost">50</td>
</tr>
</tbody>
</table>
<div id="cost_projected_total">
</div>
Loop through act_cost and check if the text in each cell is a valid and > 0 number then add it to sum2 otherwise add the cost_est at that index to sum2.
const table = document.getElementById("PLTable"),
cost_est = document.querySelectorAll(".cost_estimate"),
act_cost = document.querySelectorAll(".act_cost"),
total = document.getElementById("cost_projected_total");
let sum2 = 0;
/** loop through the "act_cost" (2nd column) **/
/**
* el: current td from "act_cost".
* i: its index in "act_cost"
**/
act_cost.forEach((el, i) => sum2 += +el.textContent > 0 ? +el.textContent:+cost_est[i].textContent);
/** "+" transforms the text into a number if possible **/
total.textContent = 'Total: ' + sum2;
<table id="PLTable">
<thead>
<tr>
<th>cost estimate</th>
<th>cost actual</th>
</tr>
</thead>
<tr>
<td class="cost_estimate">100</td>
<td class="act_cost"></td>
</tr>
<tr>
<td class="cost_estimate">100</td>
<td class="act_cost">50</td>
</tr>
</table>
<div id="cost_projected_total"></div>
Related
I would like to create a table with row count. Currently with the code I have now the row count is not update after delete in the middle row. I found this and try to apply on my code but it doesn't work for updating row count.
Here is the snippet that able to add and delete.
function add(addrow){
var id=document.getElementById('addrow').getElementsByTagName('tbody')[0];
var count=id.rows.length;
var newrow=id.insertRow();
newrow.innerHTML='<td>'+count+'</td><input type="text" name="textbox"><td></td><td><div onclick="del(this)">Delete</div></td>';
}
function del(btn) {
var deleterow = btn.parentNode.parentNode;
deleterow.parentNode.removeChild(deleterow);
}
<button type="button" onclick="add('addrow')">Add</button>
<table id="addrow">
<thead>
<tr>
<th>No</th>
<th>Text</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<tr>
</tr>
</tbody>
</table>
You can get the last row's id as max_id, then assign new row's value to max_id + 1.
Pseudo-code:
let last_row = table.rows[table.rows.length] - 1;
let max_id = last_row.id;
// create new_row
new_row.id = max_id + 1;
You will need to loop over all rows after the removed row and decrement their counts by one.
var id=document.getElementById('addrow').getElementsByTagName('tbody')[0];
function add(addrow){
var count=id.rows.length;
var newrow=id.insertRow();
newrow.innerHTML='<td>'+count+'</td><input type="text" name="textbox"><td></td><td><div onclick="del(this)">Delete</div></td>';
}
function del(btn) {
var deleterow = btn.parentNode.parentNode;
var num = +deleterow.querySelector("td").textContent;
deleterow.parentNode.removeChild(deleterow);
for(let i = num; i < id.rows.length; i++){
id.rows[i].querySelector("td").textContent--;
}
}
<button type="button" onclick="add('addrow')">Add</button>
<table id="addrow">
<thead>
<tr>
<th>No</th>
<th>Text</th>
<th>Action</th>
</tr>
</thead>
<tbody>
<tr>
</tr>
</tbody>
</table>
try this
function add(addrow){
var id=document.getElementById('addrow').getElementsByTagName('tbody')[0];
var count=id.rows.length+1;
var newrow=id.insertRow();
newrow.innerHTML='<td>'+count+'</td><input type="text" name="textbox"><td></td><td><div onclick="del(this)">Delete</div></td>';
}
function del(btn) {
var deleterow = btn.parentNode.parentNode;
deleterow.parentNode.removeChild(deleterow);
let i = 1;
Array.from(document.querySelector('tbody').children).map(child =>{
child.children[0].innerHTML = i;
i++;
})
}
<button type="button" onclick="add('addrow')">Add</button>
<table id="addrow">
<thead>
<tr>
<th>No</th>
<th>Text</th>
<th>Action</th>
</tr>
</thead>
<tbody>
</tbody>
</table>
You need to update the No column of the table when any row is deleted.
Heres' one way of doing it:
const btn = document.querySelector('button');
const tbody = document.getElementById('addrow').querySelector('tbody');
btn.addEventListener('click', () => {
// add new row in table body
const newRow = tbody.insertRow();
// get the length of rows after adding the new row
const count = tbody.rows.length;
// add columns in the newly added row
const newCell = newRow.insertCell(0);
newCell.textContent = count;
const newCell2 = newRow.insertCell(1);
newCell2.innerHTML = '<input type="text" name="textbox">';
const newCell3 = newRow.insertCell(2);
newCell3.innerHTML = `<button id="del" data-row="${count}">Delete</button>`;
});
// listen for click event on delete button of all the rows
tbody.addEventListener('click', (e) => {
if (e.target.matches('#del')) {
// delete the row using the value of 'data-row' attribute of the delete button
tbody.parentElement.deleteRow(e.target.dataset.row);
updateTableRowCount();
}
});
// update row count when any row is deleted
function updateTableRowCount() {
[...tbody.children].forEach((row, idx) => {
// update 'No' column value
row.firstElementChild.textContent = idx + 1;
// update `data-row` attribute of the delete button
row.lastElementChild.firstElementChild.setAttribute('data-row', idx + 1);
});
}
<button>Add</button>
<table id="addrow">
<thead>
<tr>
<th>No</th>
<th>Text</th>
<th>Action</th>
</tr>
</thead>
<tbody></tbody>
</table>
I'm wanting every <tbody> tag will be gone as object index like first <tbody>->1 and second <tbody>-> 2 then inside the <tbody> every <tr> will be another object and that will be store into the <tbody> object and last the last part every <td> should have object key ("eiin", "name") inside the <tr> object
I'm trying using for loop multiple times but the console.log showing me okay but first object repeated 2 times.
Html
<section class="institute_list">
<table class="table" border="1">
<thead>
<tr>
<th scope="col">EIIN</th>
<th scope="col">Institute</th>
</tr>
</thead>
<tbody>
<tr>
<td>000000</td>
<td>Name</td>
</tr>
</tbody>
<tbody>
<tr>
<td>111111</td>
<td>Name 2</td>
</tr>
</tbody>
</table>
</section>
Javascript & jQuery
<script>
var rows = '', the_row='', the_xrow={}, tr_values={}, xtd_obj={};
tbodys = ($(".institute_list .table tbody").length);
for( var x=0; tbodys > x; x++) {
rows = $('.institute_list .table tbody:nth-child('+(x+1)+') tr').length;
the_row = '.institute_list .table tbody:nth-child('+(x+1)+') tr:nth-child(';
for( var i=1; rows >= i; i++ ){
tr_values = {
'eiin' : $(the_row+i+') td:first-child').text(),
'name' : $(the_row+i+') td:nth-child(2)').text()
};
the_xrow[i] = tr_values;
}
xtd_obj[x] = the_xrow;
}
console.log(xtd_obj);
</script>
and i'm getting this output in console
here
You may try the code below. You can separate every <tbody>,<tr>,<td> tag as a loop then make them a array.
var target = $(".institute_list > table");
var output = [];
$(target).find("tbody").each(function(i){
output[i] = {};
$(this).children().each(function(j){
output[i][j] = {};
$(this).children().each(function(k, td){
if ( k == 0 ) {
output[i][j]["eiin"] = $(td).text();
} else if ( k == 1 ) {
output[i][j]["name"] = $(td).text();
} else {
output[i][j][k] = $(td).text();
}
});
});
});
console.log(output);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<section class="institute_list">
<table class="table" border="1">
<thead>
<tr>
<th scope="col">EIIN</th>
<th scope="col">Institute</th>
</tr>
</thead>
<tbody>
<tr>
<td>000000</td>
<td>Name</td>
</tr>
</tbody>
<tbody>
<tr>
<td>111111</td>
<td>Name 2</td>
</tr>
</tbody>
</table>
</section>
First, you need a closing </tbody> tag around the first element. Second I think you might be running into a scoping problem. You are defining the_xrow and tr_values outside of the for loops instead of inside of the for loops.
<script>
var xtd_obj={};
var tbodys = ($(".institute_list .table tbody").length);
for( var x=1; tbodys >= x; x++) {
var current_row = '.institute_list .table tbody:nth-child('+x+') tr';
var rows = $(current_row).length;
var the_row = current_row + ':nth-child(';
var the_xrow = {};
for( var i=1; rows >= i; i++ ){
the_xrow[i] = {
'eiin' : $(the_row+i+') td:first-child').text(),
'name' : $(the_row+i+') td:nth-child(2)').text()
};
}
xtd_obj[x] = the_xrow;
}
console.log(xtd_obj);
</script>
It's working for me
<script>
var rows = '', the_row='', xtd_obj={};
var tbodys = ($(".institute_list .table tbody").length)+1;
for( var x=1; tbodys > x; x++) {
rows = $('.institute_list .table tbody:nth-child('+(x+1)+') tr').length;
the_row = '.institute_list .table tbody:nth-child('+(x+1)+') tr:nth-child(';
var the_xrow = {};
for( var i=0; rows > i; i++ ){
var tr_values = {
'eiin' : $(the_row+i+1+') td:first-child').text(),
'name' : $(the_row+i+1+') td:nth-child(2)').text()
};
the_xrow[i] = tr_values;
}
xtd_obj[x] = the_xrow;
}
console.log(xtd_obj);
</script>
Here's the screenshot
Supposed that I have a table like this on a webpage with the id ='table':
Name Age Money(USD) DATE
A 19 4 2019-03-11 16:15:35
B 20 0 2019-03-11 16:16:37
C 27 3 2019-03-13 04:15:43
D 34 0 2019-03-13 04:16:57
Could you help me find the FIRST SMALLEST VALUE IN THE MONEY COLUMN, which is 0 for B in the Column1 and HIGHLIGHT the whole table row for B, using javascript without using any library and any button onClicking?
Note: I have searched around and just been unlucky enough to find the correct answer to my problem.
Thanks.
UPDATE:I just got a piece of javacript like this to get the first smallest value and print it out, but not be able to highlight the whole row with it
var table = document.getElementById("table"), minVal;
for(var i = 1; i < table.rows.length; i++)
{
// if its the first row get the value
if(i === 1){minVal = table.rows[i].cells[2].innerHTML; }
// test with the other values
else if(minVal > table.rows[i].cells[2].innerHTML){
minVal = table.rows[i].cells[2].innerHTML;
}
}
document.getElementById("val").innerHTML = " Minimum Value = "+minVal;
console.log(maxVal);
var table = document.getElementById("table"), minVal, minI;
for(var i = 1; i < table.rows.length; i++){
if(i === 1){
minVal = table.rows[i].cells[2].innerHTML;
}
else if(minVal > table.rows[i].cells[2].innerHTML){
minVal = table.rows[i].cells[2].innerHTML;
minI = i;
}
}
table.rows[i].cells[2].innerHTML = '<span style="background:red">' + table.rows[minI].cells[2].innerHTML + '</span>';
Something like that.
var table = document.getElementById("table");
var minVal = undefined;
for(var i = 1; i < table.rows.length; i++)
{
if(i === 1){
minVal = table.rows[i].cells[2];
}
else if(minVal.innerHTML > table.rows[i].cells[2].innerHTML){
minVal = table.rows[i].cells[2];
}
}
minVal.parentElement.style.background="yellow";
There are two things you need to do:
Convert innerHTML to a number using +
Keep track of the row number while looping.
This is the code
var table = document.getElementById("table"), minVal;
let minRow = 1;
for(var i = 1; i < table.rows.length; i++)
{
// if its the first row get the value
if(i === 1){
minVal = +table.rows[i].cells[2].innerHTML;
}
// test with the other values
else if(minVal > table.rows[i].cells[2].innerHTML){
minVal = table.rows[i].cells[2].innerHTML;
minRow = i;
}
}
let row = table.rows[minRow];
row.style.backgroundColor = 'red';
This simply keeps track of the minimum row, and lets you hang your formatting off of that:
const highlightLowest = () => {
var rows = table.rows;
var minRow = rows[0]
for (var i = 1; i < rows.length; i++){
rows[i].classList.remove('highlight')
if (Number(rows[i].cells[2].innerHTML) < Number(minRow.cells[2].innerHTML)) {
minRow = rows[i]
}
}
minRow.classList.add('highlight')
}
tr.highlight td {background-color: yellow}
<table id="table">
<tr><td>A</td><td>19</td><td>4</td><td>2019-03-11 16:15:35</td></tr>
<tr><td>B</td><td>20</td><td>0</td><td>2019-03-11 16:16:37</td></tr>
<tr><td>C</td><td>27</td><td>3</td><td>2019-03-13 04:15:43</td></tr>
<tr><td>D</td><td>34</td><td>0</td><td>2019-03-13 04:16:57</td></tr>
</table>
<hr />
<button onClick="highlightLowest()">Highlight</button>
Here you go. The function 'highlight' takes the column that you want to base your highlighting upon as an argument.
// Get your table's headers
headers = document.querySelectorAll('#table tbody tr th')
// Get your table's headers
rows = document.querySelectorAll('#table tbody tr')
// Declaring function that takes wanted column as argument
highlight = (colName) =>{
let min = 0;
for(i=0;i<headers.length;i++){
if(headers[i].innerText == colName){
for(j=1;j<rows.length;j++){
value = parseInt(rows[j].children[i].innerHTML);
if(j == 1){
min = value;
}
if(value < min){
rows[j].style.backgroundColor = "yellow"
break;
}
}
}
}
}
<table id="table">
<tbody><tr>
<th>Test 1</th>
<th>Test 2</th>
<th>Test 3</th>
</tr>
<tr>
<td>7</td>
<td>2</td>
<td>3</td>
</tr>
<tr>
<td>3</td>
<td>5</td>
<td>5</td>
</tr>
<tr>
<td>12</td>
<td>1</td>
<td>5</td>
</tr>
<tr>
<td>15</td>
<td>89</td>
<td>4</td>
</tr>
<tr>
<td>3</td>
<td>6</td>
<td>6</td>
</tr>
<tr>
<td>2</td>
<td>4</td>
<td>8</td>
</tr>
</tbody></table>
<input type='text' id='col'>
<button onclick=highlight(document.getElementById('col').value)>Highlight based on input column</button>
html
<table id="myList">
<thead>
<tr>
<td>Product ID</td>
<td>Product Name</td>
<td>Quantity</td>
</tr>
</thead>
<tbody>
</tbody>
</table>
Javascript
var tableRef = document.getElementById("myList").getElementsByTagName("tbody")[0];
var newRow = tableRef.insertRow(tableRef.rows.length);
var newCell = newRow.insertCell(0);
var otherCell = newRow.insertCell(2);
var check;
var myText = result.text;
var myTextTwo = myText.replace(/['"]+/g, '');
alert(myTextTwo);
for (var i = 0; i < tableRef.rows.length; i++) {
if (myTextTwo != tableRef.rows[i].cells[0].innerHTML) {
check = true
}
else if (myTextTwo == tableRef.rows[i].cells[0].innerHTML) {
tableRef.rows[i].cells[2].innerHTML += 1;
check = false;
break;
}
}
if (check) {
var newText = document.createTextNode(myTextTwo);
var otherText = document.createTextNode("1");
newCell.appendChild(newText);
otherCell.appendChild(otherText);
}
else {
alert("You have scanned this item before.");
}
What I have done is scanning a QR that contains a Product ID(e.g. "123") and insert the Product ID into the column called "Product ID", which I am able to do it.
However, what I am trying to do now is to, if the user scan a QR code that contains the same Product ID(e.g. "123"), my code will be able to detect the duplicate and add onto the quantity.
So what I planned to do is to loop through "Product ID" column and check if there's any duplicate. If there isn't any duplicates, the Quantity for the Product ID would be 1.
Product ID | Product Name | Quantity
123 | Hello | 1
Otherwise, duplicate exist, Quantity would be 2.
Product ID | Product Name | Quantity
123 | Hello | 2
Do you mean something like this?
var tableRef = document.getElementById("myList").getElementsByTagName("tbody")[0];
// save the row number of the existing product
var found = false;
var myText = result.text;
var myTextTwo = myText.replace(/['"]+/g, '');
// search the table for the existing product
for (var i = 0; i < tableRef.rows.length && !found; ++i) {
// if you found it then
if (tableRef.rows[i].cells[0].innerHTML == myTextTwo) {
// update the value
tableRef.rows[i].cells[2].innerHTML += 1;
// and say we found it
found = true;
}
}
// at this point, if we didn't find anything then add a new row
if (!found) {
var newRow = tableRef.insertRow(tableRef.rows.length);
newRow.insertCell(0).innerText = "...";
newRow.insertCell(0).innerText = "...";
newRow.insertCell(0).innerText = 1;
}
<table id="myList">
<thead>
<tr>
<td>Product ID</td>
<td>Product Name</td>
<td>Quantity</td>
</tr>
</thead>
<tbody>
</tbody>
</table>
I think this might help:
The function duplicateCell returns the number of the row that contains a duplicate on the given column or null if no duplicate found.
The function addOne requires a product ID to check for duplicates, a product Name (if no duplicates are found, the product will need a name, otherwise it is ignored) and it also needs to know what table to work on.
AddOne looks for duplicates using the above function and adds one to the quantity.
I started with 1 car 1 bike and 1 skateboard, added 2 bike (id2) and added 2 rockets (id 4).
var duplicateCell = function(tableId, columnNumber, stringToSearch) {
var myTbody = document.getElementById(tableId).getElementsByTagName("tbody")[0];
var tableRows = myTbody.rows.length;
for (var i = 0; i < tableRows; i++) {
if (myTbody.rows[i].cells[columnNumber].innerHTML.trim() == stringToSearch)
return i
}
return null;
}
function addOne(productId, productName, tableId) {
var myTbody = document.getElementById(tableId).getElementsByTagName("tbody")[0];
var rowIndex = duplicateCell(tableId, 0, productId)
if (rowIndex != null) {
myTbody.rows[rowIndex].cells[2].innerHTML = +myTbody.rows[rowIndex].cells[2].innerHTML.trim() + 1;
} else {
var tableRows = myTbody.rows.length;
var row = document.getElementById(tableId).insertRow();
c1 = row.insertCell(0);
c2 = row.insertCell(1);
c3 = row.insertCell(2);
c1.innerHTML = productId;
c2.innerHTML = productName;
c3.innerHTML = 1;
}
}
addOne("4", "Rocket", "myList")
addOne("4", "Rocket", "myList")
addOne("2", " ", "myList")
<table id="myList">
<thead>
<tr>
<td>Product ID</td>
<td>Product Name</td>
<td>Quantity</td>
</tr>
</thead>
<tbody>
<tr>
<td>1 </td>
<td>Car </td>
<td>1 </td>
</tr>
<tr>
<td>2 </td>
<td>Bike </td>
<td>1 </td>
</tr>
<tr>
<td>3 </td>
<td>Skateboard </td>
<td>1 </td>
</tr>
</tbody>
</table>
I have a table. I'd like to compare participants. If participant have several result points in the table, the script has to return sum of all participant's results. And so on for every participant.
The table is generated from database (".$row["pnt"]."".$row["station"]."".$row["res"]."):
Participant Station Points
aa Some1 1
dd Some1 2
aa sm2 3
dd sm2 4
bb sm3 5
ee sm3 6
For example I've to recieve such a new table:
aa - 4,
dd - 6,
bb - 5,
ee - 6
I've tried to do so:
$(document).ready(function () {
$("body").click(function () {
var rows = $("tbody tr");
var jo = [];
for (var i = 0; i < rows.length; i++) {
for (var j = 1; j <= rows.length; j++) {
var pnt1 = $(rows[i]).find(".pnt").html();
var stations1 = $(rows[i]).find(".station").html();
var pntR1 = $(rows[i]).find(".res").html();
if (pnt1 == $(rows[j]).find(".pnt").html()) {
pntR1 = parseInt(pntR1);
pntR2 = parseInt($(rows[j]).find(".res").html());
jo.push(pnt1, pntR1, pntR2);
break;
}
}
}
console.log(jo);
});
});
But I understood that I'm on a wrong way. Please, help me. I really appreicate if some one could help me on this issue.
Updated after comments:
<table id="pntsRes">
<thead>
<tr>
<th>Участники</th>
<th>Баллы</th>
</tr>
</thead>
<tbody>
<tr><td class="pnt">aa</td><td class="station">AES</td><td class="res">1</td></tr><tr><td class="pnt">dd</td><td class="station">AES</td><td class="res">2</td></tr>
<tr><td class="pnt">aa</td><td class="station">Science</td><td class="res">3</td></tr>
<tr><td class="pnt">dd</td><td class="station">Science</td><td class="res">4</td></tr><tr><td class="pnt">bb</td><td class="station">Аэродром</td><td class="res">5</td></tr>
<tr><td class="pnt">ee</td><td class="station">aeroport</td><td class="res">6</td></tr></tbody>
</table>
First, I would consider breaking your solution into three functions - one to extract the data from the HTML (which is a questionable practice in itself), one to transform the data, and one to output the new table. This way, your code is much more maintainable.
function getData() {
var rows = $("tbody tr");
var data = [];
rows.each(function(idx, row){
var pnt = row.find('.pnt').html(),
station = row.find('.station').html()),
res = parseInt(row.find('.res').html());
data.push(pnt, station, res);
});
}
Then I would consider something like this for the second method
// Pass the output from getData() into processData()
function processData(data){
var groupedKeys = {};
var groupedData = data.map(function(datum){
var name = datum[0];
var value = datum[2];
groupedKeys[name] = (groupedKeys[name] || 0) + (value || 0);
});
var transformedData = [];
Object.keys(groupedKeys).forEach(function(key){
transformedData.push([key, groupedKeys[key]]);
});
return transformedData;
}
The last method of course would need to be implemented by yourself, there's a ton that could be improved here, but it could be a good start.
I used an associative array (which is just an object in JavaScript) shown below:
http://jsfiddle.net/a5k6w300/
Changes I made:
var jo = [];
changed to an object instead of an array
var jo = {};
I also added the if(isNaN(object[key]) inside the inner loop in order to make sure that these didn't show as NaN as I continued adding them together.
$(document).ready(function () {
$("body").click(function () {
var rows = $("tbody tr");
var jo = {};
console.log(rows);
for (var i = 0; i < rows.length; i++) {
for (var j = 1; j <= rows.length; j++) {
var pnt1 = $(rows[i]).find(".pnt").html();
var stations1 = $(rows[i]).find(".station").html();
var pntR1 = $(rows[i]).find(".res").html();
if (pnt1 == $(rows[j]).find(".pnt").html()) {
pntR1 = parseInt(pntR1);
pntR2 = parseInt($(rows[j]).find(".res").html());
if(isNaN(jo[pnt1])){
jo[pnt1] = 0;
}
jo[pnt1] += pntR1;
break;
}
}
}
console.log(jo);
});
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<table id="pntsRes">
<thead>
<tr>
<th>Участники</th>
<th>Баллы</th>
</tr>
</thead>
<tbody>
<tr>
<td class="pnt">aa</td>
<td class="station">AES</td>
<td class="res">1</td>
</tr>
<tr>
<td class="pnt">dd</td>
<td class="station">AES</td>
<td class="res">2</td>
</tr>
<tr>
<td class="pnt">aa</td>
<td class="station">Science</td>
<td class="res">3</td>
</tr>
<tr>
<td class="pnt">dd</td>
<td class="station">Science</td>
<td class="res">4</td>
</tr>
<tr>
<td class="pnt">bb</td>
<td class="station">Аэродром</td>
<td class="res">5</td>
</tr>
<tr>
<td class="pnt">ee</td>
<td class="station">aeroport</td>
<td class="res">6</td>
</tr>
</tbody>
</table>