Forum Discussion
Expanding list within column
Hello,
I am having trouble trying to get a numerical list to expand or display from within a column in Power Query.
I would appreciate any help!
Please see attached picture. Thank you!
Try this rmahmood
It uses Value.Is to determine if it is a list or not, then extracts the numbers. From there you can split columns, or whatever.let Source = #table( {"ID", "Name", "City", "Other"}, { {123, "Alice", "Wonderand", ""}, {456, "Bob", "Wonderland", {1..10}} } ), #"Added Custom" = Table.AddColumn( Source, "Custom", each if Value.Is([Other], type list) then Text.Combine(List.Transform([Other], Text.From), ",") else [Other] ) in #"Added Custom"How to use M code provided in a blank query:
1) In Power Query, select New Source, then Blank Query
2) On the Home ribbon, select "Advanced Editor" button
3) Remove everything you see, then paste the M code I've given you in that box.
4) Press Done
5) See this article if you need help using this M code in your model.
5 Replies
Try this rmahmood
It uses Value.Is to determine if it is a list or not, then extracts the numbers. From there you can split columns, or whatever.let Source = #table( {"ID", "Name", "City", "Other"}, { {123, "Alice", "Wonderand", ""}, {456, "Bob", "Wonderland", {1..10}} } ), #"Added Custom" = Table.AddColumn( Source, "Custom", each if Value.Is([Other], type list) then Text.Combine(List.Transform([Other], Text.From), ",") else [Other] ) in #"Added Custom"How to use M code provided in a blank query:
1) In Power Query, select New Source, then Blank Query
2) On the Home ribbon, select "Advanced Editor" button
3) Remove everything you see, then paste the M code I've given you in that box.
4) Press Done
5) See this article if you need help using this M code in your model.rmahmood Seems like you are going to need an if statement to check if null, then return null or otherwise, extract values from the list like:
#"Extracted Values" = Table.TransformColumns(#"Added Custom", {"Custom", each Text.Combine(List.Transform(_, Text.From)), type text})
Will be different if you are trying to expand to rows, would be:
#"Expanded Custom" = Table.ExpandListColumn(#"Added Custom", "Custom")
Hi,
This is actually coming from the source.
Table.SplitColumn(PreviousStepName,"Training Modules",each if _ is list then _ else {_},List.Max(List.Transform(PreviousStepName[Training Modules],each if _ is list then List.Count(_) else 1)))
