Introduce function, that turns object/simple element into array with one position

[TobiasNx]

When working MARC -> MARC there is a scenario that you have an element that is possibly repeated but does not has to be.

If you want to add an element then you have to create to do some kind of workaround to achieve this.

[TobiasNx]

The function (to_array('path')) would be a wrapper for perhaps:

unless is_array("PATH")
    move_field("field","HELFER")
    move_field("HELFER","field.$append")
end