Using array_diff() function

Here is an example of using the array_diff() function to find elements that exist in the second array but not in the first.

• automation
• output

• start:
    set:
      array1@csv: Apple, Google, Microsoft
      array2@csv: Apple, Microsoft, Cerb
      diff@csv: {{array_diff(array2, array1)|join(', ')}}
    return:
      output: These are new: {{diff|join(', ')}}

• __return:
    output: 'These are new: Cerb'