You can iterate over data in a data file or in the current page’s frontmatter or any global variables from Jekyll or a plugin.

source

List of key-value pairs

  • _data/items.yaml ```yaml
    • foo: A bar: 10 baz: 1000
    • foo: B bar: 20 baz: 999 ```
  • index.md ```liquid — — {% for item in site.data.items %}
    • {{ item.foo }} - {{ item.bar }} - {{ item.baz }} {% endfor %} ```

Key-value pairs

  • _data/items.yaml 
      Foo: A
  Bar: B
  • index.md ```liquid {% for hash in site.data.items %}
    • Key: {{ hash[0] }} - Value: {{ hash[1] }} {% endfor %} ```

If the value is also a hash then you can do an inner loop which looks similar.

Another example

  • index.md 
      {% for link_hash in page.links %}
      {% for link in link_hash %}
          <a href="{{ link[1] }}">{{ link[0] }}</a>
      {% endfor %}
  {% endfor %}