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Generic join script
This script implements a generic join operation that can compare on arbitrary function results, for example inequality.
Input1: Example set 1
Input2: Example set 2
Inside the script, the join attribute names from example set 1 and 2 need to be specified, and the join operation. This can be as simple as e1 == e2 or something like abs(e1 - e2) <= 0.1 for a "fuzzy match" or e1.matches(e2) for a regular expression match.
The output is a joined example set.
The inputs are not allowed to contain identical attribute names, those need to be renamed before using this script.