hey guys, i have list A and list B, I want to go over B and set some property inside A depending on what I find in B, I wanna do this without 2 literal loops

what do you mean 'set some property'?

like I get my own list A, then i get a list of the same type, Favorites (B), and now I want to apply an

is_favorite == true

on the items in list B that exist in List A

well I don't think there's a way to 'know' what is in list b unless you iterate over it, so you're gonna have two loops no matter what.

i know, but I dont want to say

for (

ah, you shouldn't be using for in kotlin anyway.

i wouldn’t go that far

without knowing what your lists actually look like I can only provide small help.

here it is

searchResult.results.filter { carToMap ->
                carToMap.id == favoritesSearchResult.results.find { it.id == carToMap.id }?.id
            }.map { it.is_favorite = true }

sorry, been very busy. let me look

You can collect favorites or favorite ids into set and then use

contains

of that set:

val favoriteIds = favoritesSearchResult.results.map { it.id }.toSet()
searchResult.results.forEach {
    it.is_favorite = it.id in favoriteIds
}

sure yes