The cycle
function cycles on an array of values:
{% set start_year = date() | date('Y') %} {% set end_year = start_year + 5 %} {% for year in start_year..end_year %} {{ cycle(['odd', 'even'], loop.index0) }} {% endfor %}
The array can contain any number of values:
{% set fruits = ['apple', 'orange', 'citrus'] %} {% for i in 0..10 %} {{ cycle(fruits, i) }} {% endfor %}
position
: The cycle position
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http://twig.sensiolabs.org/doc/1.x/functions/cycle.html