String concatenation in Jinja

Question

I just want to loop through an existing list and make a comma delimited string out of it.
Something like this: my_string = \'stuff, stuff, stuff, stuff\'

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Answer 1

If you can't just use filter join but need to perform some operations on the array's entry:

{% for entry in array %}
User {{ entry.attribute1 }} has id {{ entry.attribute2 }}
{% if not loop.last %}, {% endif %}
{% endfor %}