.. _`Propagate First Input`:

.. _`org.sysess.sympathy.generic.propagatefirst`:

Propagate First Input
=====================

.. image:: propagate_first.svg
   :width: 48


Propagate first input to output



**Documentation**

Propagate first input to output.

This node is mostly useful for testing purposes.
It can also be used to force a specific execution
order.


**Definition**


*Input ports*

    :item1:  <a>

        The Item to be propagated

    :item2: 0 - inf,  <b>

        Item that will not be propagated


*Output ports*

    :item:  <a>

        Propagated Item





.. automodule:: node_list_operations

.. class:: PropagateFirst






**Example flows**

* :download:`FileOperations.syx </_examples/Sympathy/Disk/File/FileOperations.syx>`
* :download:`Propagate.syx </_examples/Sympathy/Generic/List/Propagate.syx>`