Split a "big" table to smaller tables

Question

I would like to split a "big" table (a lot of columns) to smaller tables every for example 2 columns.

Is there an easy way to do that?

I only have the table here http://jsfiddle.net/xy3UF/4/. And I would like for example split it every 2 columns. As a result I should have a three tables with containing the # column and each one containing 2 of the columns from the big table.

Desired output: http://jsfiddle.net/xy3UF/15/

Answer 1

function split($table, chunkSize) {
  var cols = $("th", $table).length - 1;
  var n = cols / chunkSize;

  for (var i = 1; i <= n; i++) {
     $("<br/>").appendTo("body");
     var $newTable = $table.clone().appendTo("body");
     for (var j = cols + 1; j > 1; j--) {
         if (j + chunkSize - 1 <= chunkSize * i || j > chunkSize * i + 1) {
             $('td:nth-child(' + j + '),th:nth-child(' + j + ')', $newTable).remove();
         }
     }
  }  
}

Where $table is the table jQuery object, and chunkSize is the size of each split. In your example, call it as split($("table"), 2). Note that chunkSize must evenly divide the number of columns (excluding the first one) for this to work correctly, for example, for a table with 7 columns, the valid values for chunkSize are 1, 2, and 3.

DEMO.

Answer 2

I made better version of table split function that support fix columns (repeat in all tables) and it waste a lot of time:

function range(start, end) {
  var array = new Array();
  for (var i = start; i <= end; i++) {
    array.push(i);
  }
  return array;
}

function splitTables($tables, chunkSize, fixCols) {
  $table = $($tables);
  console.log('fixCols :', fixCols);
  fixCols = fixCols || [];
  console.log('fixCols :', fixCols);
  fixCols = fixCols.sort();
  console.log('fixCols :', fixCols);
  //chunkSize -= fixCols.length;
  var rowLength = $('tr:first>*', $table).length;
  console.log('total length:', rowLength);
  var n = Math.ceil(rowLength / chunkSize);
  var bufferTables = [];
  var numberList = range(1, rowLength);

  for (var i = 1; i <= n; i++) {
    var colList = fixCols.slice(0);
    //console.log('fixCols :',fixCols);
    //console.log('colList :',colList);
    console.log('numberList :', numberList);
    while (colList.length < chunkSize && numberList.length > 0) {
      var index = numberList.shift();
      console.log(index, colList);
      if (colList.indexOf(index) == -1) {
        colList.push(index);
      }
    }

    console.log('col list:', colList);
    var $newTable = $table.clone(true)
    for (var index = 1;
      (index <= rowLength); index++) {
      if (colList.indexOf(index) == -1) {
        console.log('removing:', index);
        $('tr>:nth-child(' + index + ')', $newTable).hide();
      }
    }
    bufferTables.push($newTable)
  }

  $(bufferTables.reverse()).each(function(i, $el) {
    $('<br/>').insertAfter($table);
    $el.insertAfter($table);
  });
  $table.remove();

}

$(function() {
  $('#sbtn').click(function() {
    splitTables($("#tb"), 3, [1]);
  });
})

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<button id="sbtn">Split Table !</button>

<table border="1" id="tb">
  <thead>
    <tr>
      <th>0</th>
      <th>1</th>
      <th>2</th>
      <th>3</th>
      <th>4</th>
      <th>5</th>
      <th>6</th>
    </tr>
  </thead>
  <tfoot>
    <tr>
      <td>Sum</td>
      <td>$180</td>
      <td>$500</td>
      <td>$300</td>
      <td>$700</td>
      <td>$600</td>
      <td>$1000</td>
    </tr>
  </tfoot>
  <tbody>
    <tr>
      <td>Home</td>
      <td>$100</td>
      <td>$200</td>
      <td>$200</td>
      <td>$300</td>
      <td>$400</td>
      <td>$500</td>
    </tr>
    <tr>
      <td>Work</td>
      <td>$80</td>
      <td>$300</td>
      <td>$100</td>
      <td>$400</td>
      <td>$200</td>
      <td>$500</td>
    </tr>
  </tbody>
</table>