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Merge pull request #4956 from bcoca/filter_docs

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updated docs to add new filters
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Michael DeHaan 2013-11-19 13:23:42 -08:00
commit b777bb3661
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docsite/rst/playbooks_variables.rst
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@ -167,6 +167,33 @@ This allows an explicit check with this feature off::
The variable value will be used as is, but the template evaluation will raise an error if it is undefined.
.. _set_theory_filters:
Set Theory Filters
--------------------
All these functions return a unique set from sets or lists.
.. versionadded:: 1.4
To get a unique set from a list::
{{ list1 |unique }}
To get a union of two lists::
{{ list1 | union(list2) }}
To get the intersection of 2 lists (unique list of all items in both)::
{{ list1 |intersect(list2)}}
To get the difference of 2 lists (items in 1 that don't exist in 2)::
{{ list1 |difference(list2)}}
To get the symetric difference of 2 lists (items exclusive to each list)::
{{ list1 |symetric_difference(list2)}}
.. _other_useful_filters:
Other Useful Filters