Hello :), Bash arrays are not directly compatible with commands, hence array functions would need to be in Bash builtins instead of external executables. I think the length and the variety of solutions to simple questions like this one: https://stackoverflow.com/questions/2312762/compare-difference-of-two-arrays-in-bash shows that it would be needed to add a builtin like ``` declare -a base_array=("a" b" "c" "d") declare -a subtracted_array=("a "c") declare -a result_array array_diff base_array subtracted_array result_array ```
array functions from PHP could be a good source of inspiration for other functions: https://www.php.net/manual/en/ref.array.php Best regards, Laurent Lyaudet
