Kotlin: implementing Filtering a List of Objects with a Custom Predicate in a Flow
I've encountered a strange issue with I'm working with a scenario when trying to filter a list of custom data objects asynchronously using Kotlin Flows... I have a Flow that emits a list of `User` objects, and I want to apply a filter based on a certain condition. My current implementation is as follows: ```kotlin data class User(val id: Int, val name: String, val age: Int) val userFlow: Flow<List<User>> = flow { emit(listOf( User(1, "Alice", 30), User(2, "Bob", 25), User(3, "Charlie", 35) )) } val filteredUsersFlow = userFlow.map { users -> users.filter { it.age > 30 } } ``` When I collect `filteredUsersFlow`, I expect to receive only users older than 30. However, I’m working with this unexpected behavior: ``` behavior: No users found for the given filter. ``` I’ve added a `collect` block to observe the flow: ```kotlin filteredUsersFlow.collect { users -> println(users) } ``` The output is always an empty list instead of the expected `User(name="Charlie", age=35)`. I've verified that the original `userFlow` is emitting the complete list properly. I also tried using `toList()` before the `filter`, but that didn’t change the result. My project is using Kotlin 1.5.31 and Coroutines 1.5.2. Is there something I'm missing in the flow transformation, or is there a best practice I should follow for filtering data in this manner? Any insights would be appreciated! I appreciate any insights!