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``join``
========
The ``join`` filter returns a string which is the concatenation of the items
of a sequence:
.. code-block:: jinja
{{ [1, 2, 3]|join }}
{# returns 123 #}
The separator between elements is an empty string per default, but you can
define it with the optional first parameter:
.. code-block:: jinja
{{ [1, 2, 3]|join('|') }}
{# outputs 1|2|3 #}
Arguments
---------
* ``glue``: The separator
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