I really can't give any data as it is customer sensitive. Assume I have to search 10 columns for key1= or key2= or key3= or key4=. There is no way to predict what will be after those 4 words. But I have to strip out whatever follows up to a & or reach end of the field. I have to blank the original data where it comes from (just what I am pulling, not whole column) and then append new columns with what I stripped out.
I like the idea of the slice syntax. But then how would I go back and update those same columns?