Make talk count dynamic

source/_pages/talks.md

@@ -1,11 +1,17 @@
 ---
 title: Talks and Workshops
-talk_count: 94
 use:
   - talks
 ---
 
-Starting with my first talk in September 2012, I have given {{ page.talk_count }} public presentations and workshops at various conferences and meetups, in-person and remotely, on topics including PHP, Drupal, automated testing, Git, CSS, and systems administration.
+{% set talkCount = 0 %}
+{% for talk in data.talks %}
+  {% for event in talk.events if 'today'|date('U') >= event.date|date('U') %}
+    {% set talkCount = talkCount + 1 %}
+  {% endfor %}
+{% endfor %}
+
+Starting with my first talk in September 2012, I have given {{ talkCount }} public presentations and workshops at various conferences and meetups, in-person and remotely, on topics including PHP, Drupal, automated testing, Git, CSS, and systems administration.
 
 {% for talk in data.talks|sort((a, b) => a.events|last.date|date('U') > b.events|last.date|date('U') ? -1 : 1) %}
   <article>