ansible jinja2 example for uniqe dict item (for icinga)

ansible-icinga-hosts.cfg

{% set app = "" %}
{% for dict_item in icinga.application_services %}
    {% if dict_item['application'] != app %}
        {% set app = dict_item['application'] %}

define host{
    use             generic-host 
    host_name       {{ app }}
}

    {% endif %}
{% endfor %}