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``batch``
=========
The ``batch`` filter "batches" items by returning a list of lists with the
given number of items. A second parameter can be provided and used to fill in
missing items:
.. code-block:: html+twig
{% set items = ['a', 'b', 'c', 'd'] %}
<table>
{% for row in items|batch(3, 'No item') %}
<tr>
{% for index, column in row %}
<td>{{ index }} - {{ column }}</td>
{% endfor %}
</tr>
{% endfor %}
</table>
The above example will be rendered as:
.. code-block:: html+twig
<table>
<tr>
<td>0 - a</td>
<td>1 - b</td>
<td>2 - c</td>
</tr>
<tr>
<td>3 - d</td>
<td>4 - No item</td>
<td>5 - No item</td>
</tr>
</table>
If you choose to set the third parameter ``preserve_keys`` to ``false``, the keys will be reset in each loop.
.. code-block:: html+twig
{% set items = ['a', 'b', 'c', 'd'] %}
<table>
{% for row in items|batch(3, 'No item', false) %}
<tr>
{% for index, column in row %}
<td>{{ index }} - {{ column }}</td>
{% endfor %}
</tr>
{% endfor %}
</table>
The above example will be rendered as:
.. code-block:: html+twig
<table>
<tr>
<td>0 - a</td>
<td>1 - b</td>
<td>2 - c</td>
</tr>
<tr>
<td>0 - d</td>
<td>1 - No item</td>
<td>2 - No item</td>
</tr>
</table>
Arguments
---------
* ``size``: The size of the batch; fractional numbers will be rounded up
* ``fill``: Used to fill in missing items
* ``preserve_keys``: Whether to preserve keys or not (defaults to ``true``)
|
