Anyone knows why I can’t do something like this? `...

# announcements

[Christian Sousa]

Anyone knows why I can’t do something like this?

fun myFunction(list: List<String>): List<String> {
    return list.map {
        return it
    }
}

It complains about the return type being a string instead of a List<String>

[diesieben07]

return is not used inside lambdas. In this case the return is returning from myFunction (the nearest function context). That works, because map is inline.
In lambdas the last expression is the "return value".

[Christian Sousa]

So how can I achieve something like that? I was already thinking that the return was returning from the myFunction

[diesieben07]

return list.map {
  it
}

[Christian Sousa]

Gotcha! Thank you!

[ribesg]

You can actually return here, but you need to specify from which context you want to return with labels

[ribesg]

You can return@myFunction (equals to return in your case) or return@map (what you want). But it’s easier to just let the last expression be the returned value

[Mike]

I assume/hope the Lambda definition of it is a placeholder for something more complicated, right? Otherwise you could just return the original list.

[Christian Sousa]

Yeah, it was just placeholder to simplify my question 🙂