Develop Reference

How can I get only one column value from html table?

I have a html table that shows a list of users ID, Name and E-mail. When my user clicks in any row, I get the id number of that row and send to my backend. So, I did this:
//Making the table
var trs = document.getElementsByTagName('tr');
for (var i = 0; i < trs.length; i++) {
trs[i].onclick = clickHandler;
}
Function that handles the click:
function clickHandler(event) {
var numb = this.innerText.match(/\d/g);
numb = numb.join("");
window.location.replace("chooseParticipant.php?id="+numb);
}
Table Example:
<div id="table">
<table>
<thead>
<tr>
<th>ID</th>
<th>Name</th>
<th>E-mail</th>
</tr>
</thead>
<tbody>
<td>7</td>
<td>Test User</td>
<td>testuser123#example.com</td>
</tbody>
</table>
</div>
What happens then? If an user have numbers in their e-mail, the "numb" variable gets these numbers too. I don't know how to filter only the id number. Did someone have any ideas?

You could assign a class to you tag.
Something like below:-
<td class="id">7</td>
And in the javascript code you could fetch all the elements with class "id".
And then perform your click handler on each one.
var trs = document.getElementsByClassName('id');
I hope this helps.

Try this code snippet which use data-* attribute
document.addEventListener('DOMContentLoaded', function(e) {
var trs = document.querySelectorAll('#table tbody tr');
var repeater = Array.prototype.slice;
repeater.call(trs).forEach(function(tr) {
tr.addEventListener('click', function(e) {
var data = tr.querySelector('td[data-id]').dataset;
console.log('id=', data.id);
});
});
});
tbody {
cursor: pointer;
}
<div id="table">
<table border="1" cellspacing="0" cellpadding="3">
<thead>
<tr>
<th>ID</th>
<th>Name</th>
<th>E-mail</th>
</tr>
</thead>
<tbody>
<tr>
<td data-id="7">7</td>
<td>Test User 1</td>
<td>testuser1231#gmail.com</td>
</tr>
<tr>
<td data-id="8">8</td>
<td>Test User 2</td>
<td>testuser1232#gmail.com</td>
</tr>
<tr>
<td data-id="9">9</td>
<td>Test User 3</td>
<td>testuser1233#gmail.com</td>
</tr>
</tbody>
</table>
</div>

How to iterate through each data in a table

<table class="table_style" id="table">
<thead>
<tr>
<th>Id</th>
<th>Name</th>
<th>Email</th>
<th>Phone</th>
</tr>
</thead>
<tbody>
<tr >
<td>1</td>
<td>ACDB</td>
<td>agaeg#aegrg.com</td>
<td>98900000</td>
</tr>
<tr>
<td>2</td>
<td>DEFG</td>
<td>defg#defg.com</td>
<td>11111112</td>
</tr>
<tr>
<td>3</td>
<td>IJKL</td>
<td>ijkl#ijkl.com</td>
<td>1234323432</td>
</tr>
</tbody>
</table>
I am a bit confused about how to get all the data from the table using a single button. When the user click on the button i should get all the table data. I tried with the below code. I need to get all the data in a array format. So that i can save all the data to my database.
$("#saveButton").click(function(event) {
var table = document.getElementById("table");
var dataArray = [];
var data = table.find('td');
for (var i = 0; i <= data.size() - 1; i = i + 4) {
data.push(data[i].textContent, data[i + 1].textContent, data[i + 2].textContent);
}
});

Try this code.
$("#saveButton").click(function(event) {
var data = [];
$("#table tr").each(function(i){
if(i != 0){
data.push({
id: $(this).find("td:eq(0)").html(),
name: $(this).find("td:eq(1)").html(),
email: $(this).find("td:eq(2)").html(),
phone: $(this).find("td:eq(3)")}).html()
});
}
});
//do something with data
});

If you want to use jquery, have a look at https://jsfiddle.net/qg6xpy39/
HTML:
<table class="table_style" id="table">
<thead>
<tr>
<th>Id</th>
<th>Name</th>
<th>Email</th>
<th>Phone</th>
</tr>
</thead>
<tbody>
<tr >
<td>1</td>
<td>ACDB</td>
<td>agaeg#aegrg.com</td>
<td>98900000</td>
</tr>
<tr>
<td>2</td>
<td>DEFG</td>
<td>defg#defg.com</td>
<td>11111112</td>
</tr>
<tr>
<td>3</td>
<td>IJKL</td>
<td>ijkl#ijkl.com</td>
<td>1234323432</td>
</tr>
</tbody>
</table>
<button id="saveButton">
click
</button>
JS:
$("#saveButton").click(function(event) {
var rows = $('#table td'); // retrieve the rows of your table
var dataArray = [];
$.each(rows, function(idx, elt) {
dataArray.push($(elt).text()); // add cell text content to the data array
});
console.log(dataArray); // so you can check what's in the array ;-)
});

As said in comments, in plain JavaScirpt.
use querySelectorAll to select all trs. Then iterate in each of them and get it's td's innerHTML and push it in an array.
Then use Array.shift() to remove the th elements. That is, the titles.
The code
function save(){
var arr=[];
var tr=document.querySelectorAll('tr');
tr.forEach(function(x,y){
arr[y]=[];
x.querySelectorAll("td").forEach(function(z){
arr[y].push(z.innerHTML);
});
});
arr.shift();
console.log(arr);
}
Check the below snippet.
function save(){
var arr=[];
var tr=document.querySelectorAll('tr');
tr.forEach(function(x,y){
arr[y]=[];
x.querySelectorAll("td").forEach(function(z){
arr[y].push(z.innerHTML);
});
});
arr.shift();
console.log(arr);
}
<table class="table_style" id="table">
<thead>
<tr>
<th>Id</th>
<th>Name</th>
<th>Email</th>
<th>Phone</th>
</tr>
</thead>
<tbody>
<tr >
<td>1</td>
<td>ACDB</td>
<td>agaeg#aegrg.com</td>
<td>98900000</td>
</tr>
<tr>
<td>2</td>
<td>DEFG</td>
<td>defg#defg.com</td>
<td>11111112</td>
</tr>
<tr>
<td>3</td>
<td>IJKL</td>
<td>ijkl#ijkl.com</td>
<td>1234323432</td>
</tr>
</tbody>
</table>
<button onclick="save();">Save</button>

Another possible approach, again using pure javascript rather than jQuery would be to use the DOM NodeIterator in conjunction with an XPath via Document.evaluate()
<!doctype html>
<html>
<head>
<meta charset='utf-8' />
<title>Javascript DOM Processing</title>
<script type='text/javascript'>
document.addEventListener('DOMContentLoaded',function(e){
var query='/html/body/table[#id="table"]/tbody/tr/td';
var xpr = document.evaluate( query, document, null, XPathResult.ANY_TYPE, null );
var td = xpr.iterateNext();
var dataTbl=[];
while( td ){
try{
dataTbl.push( td.textContent );
td=xpr.iterateNext();
}catch( err ){
alert( 'Error'+err );
}
}
/* The data from all table cells is now in the array */
alert( dataTbl.join(String.fromCharCode(10)) );
},false);
</script>
</head>
<body>
<!-- content -->
<table class="table_style" id="table">
<thead>
<tr>
<th>Id</th>
<th>Name</th>
<th>Email</th>
<th>Phone</th>
</tr>
</thead>
<tbody>
<tr >
<td>1</td>
<td>ACDB</td>
<td>agaeg#aegrg.com</td>
<td>98900000</td>
</tr>
<tr>
<td>2</td>
<td>DEFG</td>
<td>defg#defg.com</td>
<td>11111112</td>
</tr>
<tr>
<td>3</td>
<td>IJKL</td>
<td>ijkl#ijkl.com</td>
<td>1234323432</td>
</tr>
</tbody>
</table>
</body>
</html>

Simplest approach would be
var data_arr = [];
$('#table tr').each(function() {
data_arr.push(this.cells[0].innerHTML);
data_arr.push(this.cells[1].innerHTML);
data_arr.push(this.cells[2].innerHTML);
data_arr.push(this.cells[3].innerHTML);
});

Loop HTML table and add the identical items and its calculated amount to another table

<html>
<body>
<div>
<table border="1" id="topTable">
<thead>
<th>Item</th>
<th>Sold</th>
</thead>
<tbody id="topTableBody">
<tr>
<td>Apples</td>
<td>50</td>
</tr>
<tr>
<td>Apples</td>
<td>25</td>
</tr>
<tr>
<td>Oranges</td>
<td>30</td>
</tr>
<tr>
<td>Strawberry</td>
<td>60</td>
</tr>
<tr>
<td>Cherry</td>
<td>10</td>
</tr>
<tr>
<td>Guava</td>
<td>5</td>
</tr>
<tr>
<td>Strawberry</td>
<td>20</td>
</tr>
</tbody>
</table>
</div>
<button id="btn">Click</button>
</br>
<div>
<table border="1" id="bottomTable">
<thead>
<th>Item</th>
<th>Sold</th>
</thead>
<tbody id="bottomTableBody">
</tbody>
</table>
</div>
</body>
</html>
When I press on the button I want it to loop through the top table and get the item names that're alike and add them in one row with the sold amount combined in the bottom table ex: apples will have their own row with a sold amount of 75 and others who have no names that're alike will have their own row such as Oranges with the sold amount also.

If you can use JQuery.
(JSFiddle: http://jsfiddle.net/inanda/o9axgkaz/):
jQuery('#btn').on('click', function() {
var sumMap = {};
//Iterate through table rows
$("table tbody tr").each(function () {
if (sumMap[$(this).children('td:nth-child(1)').text()]) {
sumMap[$(this).children('td:nth-child(1)').text()] = sumMap[$(this).children('td:nth-child(1)').text()] +Number($(this).children('td:nth-child(2)').text());
} else {
sumMap[$(this).children('td:nth-child(1)').text()] = Number($(this).children('td:nth-child(2)').text());
}
})
//Append result to the other table
$.each(sumMap, function (i, val) {
$('#bottomTable tr:last').after('<tr><td>'+i+'</td><td>'+val+'</td>');
});
});
Pure javascript:
(JSFiddle: http://jsfiddle.net/inanda/2dmwudfj/ ):
appendResultToBottomTable= function() {
var sumMap = calculate();
appendResultToTable('bottomTableBody', sumMap);
}
function calculate() {
var table = document.getElementById("topTableBody");
var map = {};
for (var i = 0, row; row = table.rows[i]; i++) {
var itemType=(row.cells[0].innerText || row.cells[0].textContent);
var value=(row.cells[1].innerText || row.cells[1].textContent);
if (map[itemType]) {
map[itemType] = map[itemType] +Number(value);
} else {
map[itemType] = Number(value);
}
}
return map;
}
function appendResultToTable(tableId, sumMap){
var table = document.getElementById(tableId);
for (var item in sumMap){
var row = table.insertRow(table.rows.length);
var cellItem = row.insertCell(0);
var cellValue = row.insertCell(1);
cellItem.appendChild(document.createTextNode(item));
cellValue.appendChild(document.createTextNode(sumMap[item]));
}
}

If it is applicable for your project to use external libraries, you can do it with code like below:
alasql('SELECT Item,SUM(CONVERT(INT,Sold)) AS Sold \
INTO HTML("#res",{headers:true}) \
FROM HTML("#topTable",{headers:true}) \
GROUP BY Item');
Here:
SELECT Item, SUM(Sold) FROM data GROUP BY Item is a regular SQL expression to group and sum data from the table
CONVERT(INT,Sold) conversion procedure from string to INT type
FROM HTML() and INTO HTML() special functions to read/write data from/to HTML table, {headers:true} is a parameter to use headers
I added some minor CSS code (for table and cells borders), because Alasql generates the "plain" HTML table.
See the working snippet below.
(Disclaimer: I am an author of Alasql library)
function run() {
alasql('SELECT Item,SUM(CONVERT(INT,Sold)) AS Sold INTO HTML("#res",{headers:true}) FROM HTML("#topTable",{headers:true}) GROUP BY Item');
}
#res table {
border:1px solid black;
}
#res table td, th{
border:1px solid black;
}
<script src="http://alasql.org/console/alasql.min.js"> </script>
<div>
<table border="1" id="topTable">
<thead>
<th>Item</th>
<th>Sold</th>
</thead>
<tbody id="topTableBody">
<tr>
<td>Apples</td>
<td>50</td>
</tr>
<tr>
<td>Apples</td>
<td>25</td>
</tr>
<tr>
<td>Oranges</td>
<td>30</td>
</tr>
<tr>
<td>Strawberry</td>
<td>60</td>
</tr>
<tr>
<td>Cherry</td>
<td>10</td>
</tr>
<tr>
<td>Guava</td>
<td>5</td>
</tr>
<tr>
<td>Strawberry</td>
<td>20</td>
</tr>
</tbody>
</table>
</div>
<button id="btn" onclick="run()">Click</button>
</br>
<div id="res"></div>

How to copy the contents of one row in a table to another table and add the identical ones

var Sell_Button = document.getElementById('sellbtn'),
secondTable = document.getElementById("secondTableBody");
Sell_Button.addEventListener('click', function() {
var Row = secondTable.insertRow();
for (var c = 0; c < 2; c += 1) {
Row.insertCell(c);
}
Row.cells[0].innerHTML = this.parentNode.parentNode.cells[0].innerHTML;
Row.cells[2].innerHTML = this.parentNode.parentNode.cells[1].innerHTML;
//checks to see if the secondTable has a row containing the same name
for (var f = 0; f < secondTable.rows.length; f += 1) {
//adds only the sold amount if the second table has a row with the same name
//error
if (secondTable.rows[f].cells[0].innerText === this.parentNode.parentNode.cells[0].innerText) {
secondTable.rows[f].cells[1].innerHTML = +this.parentNode.parentNode.cells[2].innerHTML;
//deletes an extra row that is added at the bottom
if (secondTable.rows.length > 1) {
secondTable.deleteRow(secondTable.rows.length - 1);
}
//if nothing matched then a new row is added
} else {
secondTable.insertRow();
Row.cells[0].innerHTML = this.parentNode.parentNode.cells[0].innerHTML;
Row.cells[1].innerHTML = this.parentNode.parentNode.cells[2].innerHTML;
}
}
}
}
<html>
<body>
<div id="firstTableDiv">
<table border="1" id="firstTable">
<thead>
<th>Item</th>
<th>Stock</th>
<th colspan="1">Sold</th>
</thead>
<tbody id="firstTableBody">
<tr>
<td>Apples</td>
<td>300</td>
<td>200</td>
<td>
<button id="sellbtn">Sell</button>
</td>
</tr>
<tr>
<td>Apples</td>
<td>300</td>
<td>100</td>
<td>
<button id="sellbtn">Sell</button>
</td>
</tr>
<tr>
<td>Oranges</td>
<td>400</td>
<td>300</td>
<td>
<button id="sellbtn">Sell</button>
</td>
</tr>
</tbody>
</table>
</div>
</br>
<div id="secondTableDiv">
Sold
<table border="1" id="secondTable">
<thead>
<th>Item</th>
<th>Sold</th>
</thead>
<tbody id="secondTableBody">
</tbody>
</table>
</div>
</body>
</html>
Ok, this example isn't exactly what i'm working on but it's very similar. The only difference is that in mine the rows and buttons are dynamically added by the user and he inserts the details. What I want is that when i press on the button of each row (sell) the details (Item and Sold only) are copied into a row in the second table and checks if the same item exists in this second table if so then it adds the amount of sold of both items in one row. For instance I press on the first row button the Apples it copies the listed above details to the second table in a row and then when i click on the button of the second row (Apples also) it only adds the sold amount up and doesn't add a second apples row because an apples row already exists in the second table but when i click on the oranges button it makes a new row because the oranges row doesn't exist. So how do I do this in JavaScript? i hope i was thorough and made any sense. I have no idea why the code isn't working here but i hope you get the point. This code works perfectly just as i want it to until for some reason i get this error: Cannot read property 'innerText' of undefined when i press the buttons approx. 6-7 times targeting the if statement where i commented error.

This sets a click handler to all buttons. If the row doesn't exist in the second table it's created. It sets a data-type referring to the item. When somebody clicks the sell button again and there is a row containing the data-type the row is updated instead of created. All in plain JavaScript.
var Sell_Button = document.querySelectorAll('.sellbtn'),
secondTable = document.getElementById("secondTableBody");
Array.prototype.slice.call(Sell_Button).forEach(function(element){
element.addEventListener('click', function(e) {
//since the button is an element without children use e.
var clickedElement = e.target;
var parentRow = clickedElement.parentNode.parentNode;
//check if second table has a row with data-type
var rowWithData = secondTable.querySelector("[data-type='"+parentRow.cells[0].childNodes[0].nodeValue+"']");
if (rowWithData)
{
rowWithData.cells[1].innerHTML = parseInt(rowWithData.cells[1].childNodes[0].nodeValue) + parseInt(parentRow.cells[2].childNodes[0].nodeValue);
}
else
{
var Row = secondTable.insertRow();
Row.setAttribute("data-type", parentRow.cells[0].childNodes[0].nodeValue);
for (var c = 0; c < 2; c += 1) {
Row.insertCell(c);
}
Row.cells[0].innerHTML = parentRow.cells[0].childNodes[0].nodeValue;
Row.cells[1].innerHTML = parentRow.cells[2].childNodes[0].nodeValue;
}
});
});
<html>
<body>
<div id="firstTableDiv">
<table border="1" id="firstTable">
<thead>
<th>Item</th>
<th>Stock</th>
<th colspan="1">Sold</th>
</thead>
<tbody id="firstTableBody">
<tr>
<td>Apples</td>
<td>300</td>
<td>200</td>
<td>
<button class="sellbtn">Sell</button>
</td>
</tr>
<tr>
<td>Apples</td>
<td>300</td>
<td>100</td>
<td>
<button class="sellbtn">Sell</button>
</td>
</tr>
<tr>
<td>Oranges</td>
<td>400</td>
<td>300</td>
<td>
<button class="sellbtn">Sell</button>
</td>
</tr>
</tbody>
</table>
</div>
</br>
<div id="secondTableDiv">
Sold
<table border="1" id="secondTable">
<thead>
<th>Item</th>
<th>Sold</th>
</thead>
<tbody id="secondTableBody">
</tbody>
</table>
</div>
</body>
</html>

Do you mean something like:
$(document).on("click", "#firstTable tr button", function(b) {
b = $(this).closest("tr");
var d = $.trim(b.find("td:first").text());
b = parseFloat($.trim(b.find("td:nth-child(3)").text()));
var a = $("#secondTable"),
c = a.find("tr").filter(function(a) {
return $.trim($(this).find("td:first").text()) == d
});
c.length ? (a = c.find("td:nth-child(2)"), c = parseFloat($.trim(a.text())), a.text(b + c)) : (a = $("<tr />").appendTo(a), $("<td />", {
text: d
}).appendTo(a), $("<td />", {
text: b
}).appendTo(a))
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div id="firstTableDiv">
<table border="1" id="firstTable">
<thead>
<tr>
<th>Item</th>
<th>Stock</th>
<th colspan="1">Sold</th>
</tr>
</thead>
<tbody id="firstTableBody">
<tr>
<td>Apples</td>
<td>300</td>
<td>200</td>
<td><button>Sell</button></td>
</tr>
<tr>
<td>Apples</td>
<td>300</td>
<td>100</td>
<td><button>Sell</button></td>
</tr>
<tr>
<td>Oranges</td>
<td>400</td>
<td>300</td>
<td><button>Sell</button></td>
</tr>
</tbody>
</table>
</div>
<br />
<div id="secondTableDiv">
Sold
<table border="1" id="secondTable">
<thead>
<tr>
<th>Item</th>
<th>Sold</th>
</tr>
</thead>
<tbody id="secondTableBody"></tbody>
</table>
</div>

Sorting pairs of rows with tablesorter

http://jsfiddle.net/9sKwJ/66/
tr.spacer { height: 40px; }
$.tablesorter.addWidget({
id: 'spacer',
format: function(table) {
var c = table.config,
$t = $(table),
$r = $t.find('tbody').find('tr'),
i, l, last, col, rows, spacers = [];
if (c.sortList && c.sortList[0]) {
$t.find('tr.spacer').removeClass('spacer');
col = c.sortList[0][0]; // first sorted column
rows = table.config.cache.normalized;
last = rows[0][col]; // text from first row
l = rows.length;
for (i=0; i < l; i++) {
// if text from row doesn't match last row,
// save it to add a spacer
if (rows[i][col] !== last) {
spacers.push(i-1);
last = rows[i][col];
}
}
// add spacer class to the appropriate rows
for (i=0; i<spacers.length; i++){
$r.eq(spacers[i]).addClass('spacer');
}
}
}
});
$('table').tablesorter({
widgets : ['spacer']
});
<table id="test">
<thead>
<tr>
<th>Name</th>
<th>Number</th>
<th>Another Example</th>
</tr>
</thead>
<tbody>
<tr>
<td>Test4</td>
<td>4</td>
<td>Hello4</td>
</tr>
<tr>
<td colspan="3">Test4</td>
</tr>
<tr>
<td>Test3</td>
<td>3</td>
<td>Hello3</td>
</tr>
<tr>
<td colspan="3">Test3</td>
</tr>
<tr>
<td>Test2</td>
<td>2</td>
<td>Hello2</td>
</tr>
<tr>
<td colspan="3">Test2</td>
</tr>
<tr>
<td>Test1</td>
<td>1</td>
<td>Hello1</td>
</tr>
<tr>
<td colspan="3">Test1</td>
</tr>
</tbody>
</table>
This sorts just the way I want it if you sort it by the first column, but the other two columns don't maintain the same paired 'tr' sort im looking for.
Any help on this?

Use the expand-child class name on each duplicated row:
<tr>
<td>Test3</td>
<td>3</td>
<td>Hello3</td>
</tr>
<tr class="expand-child">
<td colspan="3">Test3</td>
</tr>
It's defined by the cssChildRow option:
$('table').tablesorter({
cssChildRow: "expand-child"
});​
Here is a demo of it in action.