Using liquid to sort posts alphabetically

Question

Is there a way to sort a number of posts alphabetically, using Jekyll?

I have something like this now:

{% for post in site.categories.threat %}


        

Answer 1

i tested Christian's great solution in my local site: before the first row there is an empty link (i don't no why) in output, therefore the first link doesn't work, so i modified his code inserting {% if postitems[1] %} before the line {{ postitems[0] }}
and an {% endif %} after. suggested tanky woo's comment.