v9.22.0
Removes any nil
values from an array.
For this example, assume site.pages
is an array of content pages for a website, and some of these pages have an attribute called category
that specifies their content category. If we map
those categories to an array, some of the array items might be nil
if any pages do not have a category
attribute.
Input
{% assign site_categories = site.pages | map: "category" %}
{% for category in site_categories %}
- {{ category }}
{% endfor %}
Output
- business
- celebrities
-
- lifestyle
- sports
-
- technology
By using compact
when we create our site_categories
array, we can remove all the nil
values in the array.
Input
{% assign site_categories = site.pages | map: "category" | compact %}
{% for category in site_categories %}
- {{ category }}
{% endfor %}
Output
- business
- celebrities
- lifestyle
- sports
- technology