merge

It creates a union from two arrays or objects.

{% foreach item in [1, 2]|merge(['apple', 'orange']) %}
    {{item}} <br />
{% endforeach %}

1
2
apple
orange

Please note here that if a value is provided for the same key again in the merge parameter, the original value is overwritten by this new one.

{% foreach item in { 'apple': 'fruit', 'potato': 'unknown' }|merge({ 'potato': 'vegetable'}) %}
    {{item}} <br />
{% endforeach %}

fruit
vegetable

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