In this qlik sense functions tutorial I have talked about pick function which helps us pick the nth expression based on the argument 'n' which can return 1,2,3 etc. and helps us pick the expression specified at relevant position.
Like what I am doing? Buy me a Coffee to re-energize - https://tinyurl.com/txe98jf
Data set - https://tinyurl.com/yd65vnf3 (Look for qlik sense folder here)