I want to create an empty set of Strings, as a starting point for further processing. (In this case, for generating a power set of some categories - which has to include the empty set)
Sounds like a simple task, right? But I'm actually quite stumped by this. What I've tried so far:
- Table Creator: can only create simple values and smilies
- GroupBy, Column Aggregator: When given only missing values, will either produce a missing value, too, or a set containing a missing value.
- Java Snippet: Has the option to create arrays, but they are always interpreted as lists.
- Missing Values: Seems only to be able to replace basic types
So... any ideas?