In a column if the value of a row is a name, then replace all the values below that row with null

[pouyanebrahimi]

In a table like the one below, I want to replace the values below the word "completed"

Col1	Col2	Col3
5	Completed	9
Completed	10	16
2	5	Completed
6	8	2

So the result should be as below:

Col1	Col2	Col3
5	Completed	9
Completed	Null	16
Null	Null	Completed
Null	Null	Null

Any guide is appreciated. Thanks. 

[camargos88]

Hi @pouyanebrahimi ,

Try this mcode:

let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlXSUXLOzy3ISS1JTQGyLZVidaJRRAwNQIQZWNwIyETVARI1A4pYALGRUmwsAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Col1 = _t, Col2 = _t, Col3 = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Col1", type text}, {"Col2", type text}, {"Col3", type text}}),
ReplaceValues =
List.Transform(
Table.ColumnNames(#"Changed Type"),
each
let
_text = Table.ToList(Table.SelectColumns(#"Changed Type", _)),
_before = List.Range(_text, 0, List.PositionOf(_text, "Completed") + 1),
_after = List.Repeat({null}, List.Count(_text) - List.PositionOf(_text, "Completed") - 1)
in
List.Combine({_before, _after})
),
Table = Table.FromColumns(ReplaceValues)
in
Table

[pouyanebrahimi]

@camargos88  WoW! That was awesome! Thanks a lot!