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filters
``reduce`` ========= .. versionadded:: 1.41 The ``reduce`` filter was added in Twig 1.41 and 2.10. The ``reduce`` filter iteratively reduces a sequence or a mapping to a single value using an arrow function, so as to reduce it to a single value. The arrow function receives the return value of the previous iteration and the current value of the sequence or mapping: .. code-block:: twig {% set numbers = [1, 2, 3] %} {{ numbers|reduce((carry, v) => carry + v) }} {# output 6 #} The ``reduce`` filter takes an ``initial`` value as a second argument: .. code-block:: twig {{ numbers|reduce((carry, v) => carry + v, 10) }} {# output 16 #} Note that the arrow function has access to the current context. Arguments --------- * ``array``: The sequence or mapping * ``arrow``: The arrow function * ``initial``: The initial value
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