{% 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 |