liquid/_filters/map.md

title, description

title	description
map	Liquid filter that creates an array of values by extracting a named property from an object.

Creates an array of values by extracting the values of a named property from another object.

In this example, assume the object site.pages contains all the metadata for a website. Using assign with the map filter creates a variable that contains only the values of the category properties of everything in the site.pages object.

Input

```liquid {%- raw -%} {% assign all_categories = site.pages | map: "category" %}

{% for item in all_categories %}

• {{ item }} {% endfor %} {% endraw %}

<p class="code-label">Output</p>
```text
- business
- celebrities
- lifestyle
- sports
- technology