```open class Human() class Men:Human() class Wom...

# announcements

[dasz]

open class Human() 
class Men:Human()
class Women:Human()
val humanNation = asList(Women(), Man())

val womenForMe = humanNation.firstOrNull{ it is Women} as Women?
any shorter form?

thank you @agrosner for the help the solution is
inline fun <reified K:T, T> List<T>.firstOrNull(): K? = firstOrNull { it is K} as K?
usage
val womenForMe : Women = humanNation.firstOrNull()

[zpearce]

I don't think you need the cast to Women?

[agrosner]

It might return a base class that's why he's casting

[fred.deschenes]

there's filterIsInstance but that's not shorter and will go through the whole list

[Shawn]

I assumed there was some base Human type that was being implemented

[kristofdho]

not with a sequence and .first()

[agrosner]

Make an extension inline reified method

[agrosner]

Then you can just call firstOrNull<Woman>

[agrosner]

like this:

inline fun <reified T> List<T>.singleOrNull(): T? = singleOrNull { it is T} as T?

[agrosner]

that might work. not sure what kind of object you're operating on

[dasz]

let me check, it could be a solution

[dasz]

nope it doesn't help much as it should operate on Human and Women:Human class, like <T:K, K>

[dasz]

ok, got it, thx @agrosner using your solution I found the way,
inline fun <reified K:T, T> List<T>.firstOrNull(): K? = firstOrNull { it is K} as K?

[agrosner]

great!