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

The in operator performs containment test.

It returns true if the left operand is contained in the right.

{% if name in array %}

http://twig.sensiolabs.org/doc/templates.html#containment-operator