In a comment on my post on Creating Sequences of Integers And Characters In Power BI/Power Query Lists a reader, Paul G, asked me the following question:
can you reverse this? e.g i have a list (1,2,3,5,7,8,9,12,13,14,15) can i convert this to (1-3, 5 ,7-9,12-15)
This got me thinking… I was sure it could be done in M, but would it be possible using just the UI? As far as I can see, it isn’t – there’s one crucial thing I can’t do – but I would be interested to see if anyone else can come up with a no-code solution.
Check out the comments for other attempts at solving the problem with as little code as possible.