when i have a ```State lt List lt MyData gt gt ``` how would

Question

when i have a ```State lt List lt MyData gt gt ``` how would i use a layout compontn like Rowm Column or smth else to render each element in the list essentially can i do a renderEach

Zach Klippenstein (he/him) [MOD] · Answer

Unless you know the list will always be very small the safest bet is to use `LazyColumn` or `LazyRow`

Zach Klippenstein (he/him) [MOD] · Answer

But technically yes you could just iterate over it with a foreach and call other composables That s not as performant as using the lazy list composables though

theapache64 · Answer

Try `LazyColumn` as < Zach Klippenstein he him MOD > mentioned ```LazyColumn items myList value item gt Text Item $item ```

Nikky · Answer

so this will re render the items if myList value changes nice

Zach Klippenstein (he/him) [MOD] · Answer

if `List` is either immutable and you push a new value into the `State` or if your list is a `mutableStateListOf` then yes

Zach Klippenstein (he/him) [MOD] · Answer

If your list is simply a `mutableListOf` and you mutate the list it won t trigger recompositions

Nikky · Answer

okay so either list in state or mutableStateListOf makes sense

theapache64 · Answer

```fun main val myList = mutableStateListOf MyData A MyData B MyData C Window Column LazyColumn items myList size itemIndex gt val item = myList itemIndex Text Item $ item name Button onClick = myList add MyData NEW $ Date Text text = Add New Item ```

Nikky · Answer

i tried this but it seems to crash as soon as the list reduces in size it seems to re render and cannot find the index anymore PS i guess i need `myList getOrNull ItemIndex return items`

Adam Powell · Answer

known issue fixed by <https android review googlesource com c platform frameworks support + 1640311> this should be in beta03 next week

Nikky · Answer

heh nice

Nikky · Answer

well this about scrolling in my case i have a TextField and a remembered TextFieldValue on each element and when i remove any element only the last element in the rendered lsit gets removed although console tells me the data is correct i do the remembered TextFieldValue this way ```val textState = remember index mutableStateOf TextFieldValue item foo ``` i hope this makes sense i am new to this and jsut want to see what i can do

Nikky · Answer

i found a way to make it work i guess use `State lt MyData gt ` as elements in the list and do not use `remember ` at all