Can I map multiple value `flowNode nextNodes addAll target o

Question

Can I map multiple value `flowNode nextNodes addAll target outgoing toList map it target ` I would like to return it target and it description can I write `flowNode nextNodes addAll target outgoing toList map it target it description `

karelpeeters · Answer

Please surround your code with `

karelpeeters · Answer

You may be looking for `flatMap`

fstn · Answer

mmm I thought that flatMap is used to map multiple values for example multiple targets but I would return target and description

karelpeeters · Answer

What do you want the result to be A list of pairs A map A list that contains both the `target`s and `description`s

fstn · Answer

a list of pairs

fstn · Answer

target description

karelpeeters · Answer

In that case use ` map it target to it description `

fstn · Answer

thank you so when I want to associate value inside a pair I can use the infix function to

karelpeeters · Answer

It s technically just a normal `infix` function but yes

fstn · Answer

wink It s my first day using Kotlin sorry

karelpeeters · Answer

No problem

fstn · Answer

what do you thing about writing that kind of stuff ` val outgoingResult = target outgoing toList map it target to it extensionElements elementsQuery filterByType CamundaInputOutput class java map it flow gt parseNode it to flow `

fstn · Answer

it s seems to be hard to understand for someone else

fstn · Answer

what kind of coding style should I use all on one line or maybe split into variables

karelpeeters · Answer

I d put the `parseNode` in the original map there s no reason for it to be separated

karelpeeters · Answer

The code itself looks fine to me just format it correctly I d go with one of these

karelpeeters · Answer

```outgoingResult = target outgoing toList map parseNode it target to it extensionElements elementsQuery filterByType CamundaInputOutput class java outgoingResult = target outgoing toList map Pair parseNode it target it extensionElements elementsQuery filterByType CamundaInputOutput class java ```

fstn · Answer

yes slightly smiling face it s better now

fstn · Answer

I need to find my style slightly smiling face

fstn · Answer

I use this `it extensionElements elementsQuery filterByType CamundaInputOutput class java list map it camundaInputParameters map it textContent first `multiple times what is the best way to mutualise this part of code

fstn · Answer

create a function

fstn · Answer

or there is something better

karelpeeters · Answer

`x let ` can help eliminate a bunch of those s in that code

karelpeeters · Answer

You can also just inline maps ` map f it map g x ` is the same as ` map g f it `

karelpeeters · Answer

If you still want to create a function for it there are extension functions <https kotlinlang org docs reference extensions html>

fstn · Answer

ok for the let I can use only one let to replace all

fstn · Answer

I need to put it at the end

karelpeeters · Answer

Sure as long as the s in your code all come from one of the first things being null

fstn · Answer

thank you

fstn · Answer

` map it camundaInputParameters map it textContent ` no seems to be similar to ` map it camundaInputParameters map it textContent ``

fstn · Answer

I don t understand why

fstn · Answer

It should be the same no

fstn · Answer

I have no compilation issue by adding a first between both `map it camundaInputParameters first map it gt it textContent ``

karelpeeters · Answer

They are mostly the same yes

karelpeeters · Answer

There may be some null related differences but that just depends on where you place the s