Add "group by array" include to simplify archive pages

_pages/recipes-archive.html

@@ -0,0 +1,22 @@
+---
+layout: archive
+title: "Recipes Archive"
+permalink: /recipes-archive/
+---
+{% include absolute-url.liquid %}
+{% include group-by-array.html collection=site.recipes field='categories' %}
+
+{% for category in group_names %}
+  {% assign posts = group_items[forloop.index0] %}
+  <h3>{{ category }}</h3>
+  {% for post in posts %}
+    <article itemscope itemtype="http://schema.org/CreativeWork">
+      {% if post.link %}
+        <h2 class="link-post" itemprop="headline"><a href="{{ absurl }}{{ post.url }}" title="{{ post.title }}">{{ post.title }}</a> <a href="{{ post.link }}" target="_blank" title="{{ post.title }}"><i class="fa fa-link"></i></a></h2>
+      {% else %}
+        <h2 itemprop="headline"><a href="{{ absurl }}{{ post.url }}" title="{{ post.title }}">{{ post.title }}</a></h2>
+        <p itemprop="description">{{ post.excerpt | markdownify | strip_html | strip_newlines | escape_once }}</p>
+      {% endif %}
+    </article>
+  {% endfor %}
+{% endfor %}