Variable modified in loop does not persist outside the loop

Question

{% set title_org = nav_item.title.split(" ") %}
{% set title_mod = "" %}
{% for i in title_org %}
  {% if loop.index > 3 %}
    {% set title_mod = title_mod + ' ' + i %}
  {% endif %}
{% endfor %}
<a href="{{ nav_item.url }}" id="{{ id }}">{{ title_mod }}</a>

{{ title_mod }} is an empty string despite concatenated within the loop. How can I retrieve the updated {{ title_mod }} outside the for loop?

Answer 1

You should use array/dictionary like

<p style="display:none;">
{% set title_data = {'org': nav_item.title.split(" "), 'mod' : ""} %}
{% for i in title_data.org %}
  {% if loop.index > 3 %}
    {{ title_data.update({'mod' : title_data.mod + ' ' + i}) }}
  {% endif %}
{% endfor %}
</p>
<a href="{{ nav_item.url }}" id="{{ id }}">{{ title_data.mod }}</a>

Looks like a dupe