How to remove duplicated items in array on Twig

Question

How to remove duplicated items in array on Twig?

I have array value in twig such as.

{{ set array = [\"testA         


        

Answer 1

{% set keeper = {} %}
{% set throwaway = [] %}
{% for thing in yourSet.all() %}

  {% if thing.id not in throwaway %}
    {% set throwaway = throwaway|merge([thing.id]) %}
    {% set keeper = keeper|merge([{ slug: thing.slug, title: thing.title}]) %}
  {% endif %}

{% endfor %}

Modification on the accepted answer above. I needed to remove duplicates from a set and end up with an object of just slug and title.