Replacing Errors in Power Query

[Magdoulin1]

Hello everyone,

I am trying to replace errors in one of the columns by the below function but it does not work, what kind of  modifction I need to apply in the below code?

That is a sample of my table: Table1

And below is the code:

let
Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Service Period", type text}}),
#"Inserted Minimum" = Table.AddColumn(#"Changed Type", "Minimum", each List.Min({#date(Value.FromText(Text.End(Text.BeforeDelimiter([Service Period], ", "&"#(lf)"),4)),Date.Month(Date.FromText("1"&Text.BeforeDelimiter([Service Period], ", "&"#(lf)"))),1), #date(Value.FromText(Text.End(Text.AfterDelimiter([Service Period], ", "&"#(lf)"),4)),Date.Month(Date.FromText("1"&Text.AfterDelimiter([Service Period], ", "&"#(lf)"))),1)}), Int64.Type),
#"Inserted Parsed Date" = Table.AddColumn(#"Inserted Minimum", "Index", each Date.From(DateTimeZone.From([Service Period])), type date),
#"Replaced Errors" = Table.ReplaceErrorValues(#"Inserted Parsed Date", {{"Index", List.Min({#date(Value.FromText(Text.End(Text.BeforeDelimiter([Service Period], ", "&"#(lf)"),4)),Date.Month(Date.FromText("1"&Text.BeforeDelimiter([Service Period], ", "&"#(lf)"))),1), #date(Value.FromText(Text.End(Text.AfterDelimiter([Service Period], ", "&"#(lf)"),4)),Date.Month(Date.FromText("1"&Text.AfterDelimiter([Service Period], ", "&"#(lf)"))),1)})}})
in
#"Replaced Errors"

[m_dekorte · Accepted solution]

Hi @Magdoulin1,

Your requirement is unclear, what are you aiming to achieve?
For example this will get what you appear to be after but other than that ???

let
    Source = Table.FromList( {"May 2023,#(lf)June 2023"}, Splitter.SplitByNothing(), type table[Service Period=text] ),
    insertMinimum = Table.AddColumn(Source, "Minimum", each List.Min( List.Transform( Text.Split([Service Period], "#(lf)"), Date.From )))
in
    insertMinimum

It yields this outcome.

I hope this is helpful

[v-jingzhan-msft]

@m_dekorte 

Great! I never know that Date.From can add 1 as day value when the source date lacks day. Thanks for this simple solution!

@Magdoulin1 

Your code will work if you add a whitespace after 1. This can make them be recognized as date correctly. 

Best Regards,
Jing