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HTMLSaved
 
<!DOCTYPE html>
<html>
  <head>
    <script src="https://code.jquery.com/jquery-1.11.3.min.js"></script>
​
    <link href="https://nightly.datatables.net/css/jquery.dataTables.css" rel="stylesheet" type="text/css" />
    <script src="https://nightly.datatables.net/js/jquery.dataTables.js"></script>
​
    <meta charset=utf-8 />
    <title>DataTables - JS Bin</title>
  </head>
  <body>
    <div class="container">
      <table id="example" class="display nowrap" width="100%">
        <thead>
          <tr>
            <th>Day</th>
            <th>Value</th>
          </tr>
        </thead>
​
        <tbody>
          <tr>
            <td>Monday</td>
            <td>30</td>
          </tr>
          <tr>
            <td>Monday</td>
            <td>10</td>
          </tr>
          <tr>
            <td>Tuesday </td>
            <td>25</td>
          </tr>
          <tr>
            <td>Tuesday </td>
            <td>40</td>
          </tr>
          <tr>
            <td>Thursday </td>
            <td>10</td>
          </tr>
          <tr>
            <td>Thursday </td>
            <td>15</td>
          </tr>
        </tbody>
      </table>
    </div>
  </body>
</html>
CSSSaved
 
body {
  font: 90%/1.45em "Helvetica Neue", HelveticaNeue, Verdana, Arial, Helvetica, sans-serif;
  margin: 0;
  padding: 0;
  color: #333;
  background-color: #fff;
}
​
JavaScriptSaved
 
$(document).ready( function () {
  var table = $('#example').DataTable();
​
  var sums = {};
​
  table.rows().every( function ( rowIdx, tableLoop, rowLoop ) {
    var data = this.data();
​
    if ( ! sums.hasOwnProperty( data[0] ) ) {
      sums[ data[0] ] = 0;
    }
    
    sums[ data[0] ] += data[ 1 ] * 1;
  } );  
  
  console.log(sums)
​
} );
​
Output 300px

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