guess i can just use enums or sealed classes inste...
# getting-startedh
Hullaballoonatic
09/17/2018, 6:29 PMguess i can just use enums or sealed classes instead
s
Sam
09/17/2018, 6:35 PMNot sure if this helps but something that came across, https://kotlinlang.org/docs/reference/generics.html#upper-bounds
Sam
09/17/2018, 6:35 PM Copy code
fun <T> copyWhenGreater(list: List<T>, threshold: T): List<String>
where T : CharSequence,
T : Comparable<T> {
return list.filter { it > threshold }.map { it.toString() }
}h
Hullaballoonatic
09/17/2018, 6:36 PMthis does help, thank you
Hullaballoonatic
09/17/2018, 6:36 PMthis seems to be exactly what i wanted
s
Sam
09/17/2018, 6:37 PMCool
Sam
09/17/2018, 6:56 PM Copy code
open class Animal
interface Carnivorous
class Cat : Animal()
class Dog : Animal()
class Pig : Animal()
class Lion : Animal(), Carnivorous
class Tiger : Animal(), Carnivorous
fun <T> printCarnivorousAnimal( animal : T ) where T : Animal, T : Carnivorous {
println( animal )
}
fun main(args: Array<String>) {
printCarnivorousAnimal( Lion() )
printCarnivorousAnimal( Tiger() )
printCarnivorousAnimal( Cat() ) // error as Cat doesn't implement Carnivorous
}Sam
09/17/2018, 6:56 PMHelps enforce type safety
h
Hullaballoonatic
09/17/2018, 6:56 PMyup
Hullaballoonatic
09/17/2018, 6:57 PMlove you, dude. great help!
s
Sam
09/17/2018, 6:57 PMNo worries
a
Andreas Sinz
09/17/2018, 7:15 PM@Hullaballoonatic are you sure thats what you wanted? that just means
TCharSequenceComparable<T>h
Hullaballoonatic
09/17/2018, 7:16 PMyeah, it's not exactly what i needed, but i still appreciate that you showed me something i don't already understand
👍 1