does anyone know how to fix this syntax error? I want to alter the structure of the first map so that it returns

List<Pair<PublisherMessage, deviceType>>

. It currrently only returns

emailMesssages: List<MessageSender>

simplified snippets are preferred

thanks @Shawn second inner map did you mean the flatmap bit?

lines 22-26

Could you please provide an example as im quite lost

Currently

map

return the Pair because map lreturns the last expression and currently you have ony one expression that creates Pair object. If you want to return something else you could just wrap it in the list

.map { pair ->
listOf(Pair(...))
}

here is the snippet

do you want the second pair element to be a

Pair<List<MessageSender, String>>

?

yes

.map { (error, messages) ->
  error to messages.map { myMessage -> 
    MessageSender(message = myMessage.environment) to myMessage.phoneType
  }
}

is perhaps what you want

let me try that

I am increasingly less confident that this is all what you want, but you can use

it

as a reference to the element you’re grouping by

@Shawn thanks tried that now getting one more error

you have a type mismatch

okay thanks I managed to get rid of the syntax error by changing the signature of

handleMessages(messages: Map<MessageIndex, List<Pair<MessageSender, String>>>)