PowerQuery: How to replace text with each column name for multiple columns - list

Question

I'm trying to replace "x" in each column (excepts for the first 2 columns) with the column name in a table with an unknown number of columns but with at least 2 columns.
I found the code to change one column, but I want it to be dynamic:
#"Ersatt värde" = Table.ReplaceValue(Källa,"x", Table.ColumnNames(Källa){2},Replacer.ReplaceText,{Table.ColumnNames(Källa){2}})
Any ideas on how to solve it?

Answer 1

If I understand correctly, I think you can try either approach below:
#"Ersatt värde" =
let
columnsToTransform = List.Skip(Table.ColumnNames(Källa), 2),
accumulated = List.Accumulate(columnsToTransform, Källa, (tableState as table, columnName as text) =>
Table.ReplaceValue(tableState,"x", columnName, Replacer.ReplaceText, {columnName})
)
in accumulated
or:
#"Ersatt värde" =
let
columnsToTransform = List.Skip(Table.ColumnNames(Källa), 2),
transformations = List.Transform(columnsToTransform, (columnName) => {columnName, each
Replacer.ReplaceText(Text.From(_), "x", columnName)}),
transformed = Table.TransformColumns(Källa, transformations)
in transformed,
Both ways follow a similar approach:
Figure out which columns to do replacements in (i.e. all except the first 2 columns)
Loop over columns determined in previous step and actually do the replacement.
I've used Replacer.ReplaceText since that's what you'd used in your question, but I believe this will replace both partial matches and full matches.
If you only want full matches to be replaced, I think you can use Replacer.ReplaceValue instead.