'Kotlin filter list by predicate
I am trying to filter a list based on a condition that a property inside the list is an enum type. But I get an error on the filter function. Can anyone tell me how to resolve this error and why it is happening?
Type inference failed. The value of the type parameter T should be mentioned in input types (argument types, receiver type or expected type). Try to specify it explicitly.
My code is below:
data class Person(
val name: String,
val ageInDays: Int,
val currentStatus: List<Status>,
)
data class Status(
val name: String,
val activity: Activity
)
enum class Activity {
COOK,
CLEAN,
SLEEP,
}
fun main() {
var build = listOf(
Person("abc", 3655, listOf(
Status("abcProc1", Activity.COOK),
Status("abcProc2", Activity.CLEAN),
Status("abcProc2", Activity.SLEEP),
)
),
Person("ghi", 500, listOf(
Status("ghiProc", Activity.COOK),
Status("ghiProc", Activity.SLEEP),
)
),
Person("def", 1000,listOf(
Status("defProc", Activity.SLEEP)
)
)
)
println(build.filter { it.currentStatus.contains(Activity.CLEAN) })
}
Sources
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Source: Stack Overflow
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