Expression to add items within a list of integers obtaining this value from within a for each

[amanda.gondim]

Hello community, attached I’m leaving part of my flow so you can have a better idea of ​​the structure. but basically I’m using this expression int_indicesNC.Concat({int_indexSaldo}).ToList()
is it correct, does it work?

Main.xaml (7.6 KB)

[ppr (Peter Preuss)]

@amanda.gondim

int_indicesNC.Concat({int_indexSaldo}).ToList()

int_indicesNC.Append(int_indexSaldo).ToList()
would be more adequate

[HowTo] LINQ - First Start # Concat | Append | Prepend Operator

This HowTo gives an introductory overview of the conjunction operators: Concat, Append, Prepend Introduction The conjunction operators are used to add the item(s) to a particular set of items. Concat, Append, Prepend Operator The Concat Operator combines a set of items with another set of items The Append Operator adds an item to a set of items on the end The Prepend Operator adds an item to a set of items on the begin Overview I – Input P – Processing O – Output {"A","B"} / {"C",…

[postwick (Paul Ostwick)]

@amanda.gondim

int_indicesNC.Concat({int_indexSaldo}).ToList()

You don’t add .ToList() on the end. Concat already returns a list.

[ppr (Peter Preuss)]

@postwick

Concat already returns a list.

no, will return IEnumerable / ConcatIterator

[postwick (Paul Ostwick)]

A list is an IEnumerable.

[ppr (Peter Preuss)]

And the working one:

we will stop this side thread right now

[postwick (Paul Ostwick)]

Works fine. Because List inherits from IEnumerable.

[ppr (Peter Preuss)]

works fine in your case, because the upper type from the inheritance chain is working
works not as shown in the screenshot when the datatype is set to more stricht datatype: List(Of Int32)

we already mentioned:

@ppr

we will stop this side thread right now

so if you want to add value to the discussion then help the OP on optimizing the code eg. handling the nulls returned from the FirstOrDefault, when the condition is not met