I have a list of numbers:

val numbers = listOf(1,0,4,0,10,14,16,0,0,34,46)

how can I transform it in another list where each number is the maximum so far?

val numbers = listOf(1,1,4,4,10,14,16,16,16,34,46)

You can use `runningReduce`: https://pl.kotl.in/MfM-GN6U1

@randomcat thanks! I think I simplified it too much 🙂 in reality, my list is structured like this: val numbers =

listOf(obj(1),obj(0),obj(4),obj(0),obj(10),obj(14),obj(16),obj(0),obj(0),obj(34),obj(46))

it’s a list of objects, where the number is one of the object properties how is it possible to apply the same pattern in case of the object?

add a

map { it.value /* or whatever */ }

to get the value out

I got stuck. I am not sure how to use map in this context

oh, you want to keep the objects, not just the values

yes, exactly

@randomcat thanks again! however I can see that it replaces the whole object and not just the value of the property (as I would like). I have added an extra property and you can see it here: https://pl.kotl.in/tuvumPXk9

so which values of the other properties do you want?

I would like to keep the same objects, and only update the single property in the objects

which object do you want the other properties to come from? the first object?

so the “id” properties in the example, should stay the same

where do you want the id to come from?

the “id” should stay the same

it should stay the same at what value?

basically, I would like this:

[I(value=1, id=A), I(value=0, id=B), I(value=4, id=C), I(value=0, id=D), I(value=10, id=E)]

to become this:

[I(value=1, id=A), I(value=1, id=B), I(value=4, id=C), I(value=4, id=D), I(value=10, id=E)]

by running the code I get this:

[I(value=1, id=A), I(value=1, id=A), I(value=4, id=C), I(value=4, id=C), I(value=10, id=E)]

that's not what I get with the link above

that’s weird

runningReduce

doesn't play nice with mutation, and it seems like a bad idea to mutate here

ok, I see