merge
merge
The merge
filter merges an array with another array:
{% set values = [1, 2] %} {% set values = values|merge(['apple', 'orange']) %} {# values now contains [1, 2, 'apple', 'orange'] #}
New values are added at the end of the existing ones.
The merge
filter also works on hashes:
{% set items = { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'unknown' } %} {% set items = items|merge({ 'peugeot': 'car', 'renault': 'car' }) %} {# items now contains { 'apple': 'fruit', 'orange': 'fruit', 'peugeot': 'car', 'renault': 'car' } #}
For hashes, the merging process occurs on the keys: if the key does not already exist, it is added but if the key already exists, its value is overridden.