filter

{% set sizes = [34, 36, 38, 40, 42] %}

{{ sizes | filter(v => v > 38) | join(', ') }}
{# output 40, 42 #}

Combined with the for tag, it allows to filter the items to iterate over:

{% for v in sizes | filter(v => v > 38) -%}
  {{ v }}
{% endfor %}
{# output 40 42 #}

It also works with mappings:

{% set sizes = {
  xs: 34,
  s:  36,
  m:  38,
  l:  40,
  xl: 42,
} %}

{% for k, v in sizes | filter(v => v > 38) -%}
  {{ k }} = {{ v }}
{% endfor %}
{# output l = 40 xl = 42 #}

The arrow function also receives the key as a second argument:

{% for k, v in sizes | filter((v, k) => v > 38 and k != "xl") -%}
  {{ k }} = {{ v }}
{% endfor %}
{# output l = 40 #}

Note that the arrow function has access to the current context.

Arguments

Argument	Description	Type
`array`	The sequence or mapping	Array
`arrow`	The arrow function	Function

Arguments

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