Created
September 28, 2018 08:28
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TypeErasure.Kt
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// Warning, this code won't compile in Kotlin | |
// it has problemss. Can you spot which line won't compile? | |
fun main(args: Array<String>) { | |
val mlist = listOf(Programmer("Ted"), Tester("Steph")) // (1) | |
val mprogs = mlist.typeOf<Programmer>() // (2) | |
mprogs.forEach { // (3) | |
println("${it.toString()} : ${it.javaClass.simpleName}") | |
} | |
} | |
fun <T> List<pass:[*]>.typeOf() : List<T> { // (4) | |
val retlist = mutableListOf<T>() // (5) | |
this.forEach { | |
if (it is T) { // (6) | |
retlist.add(it) // (7) | |
} | |
} | |
return retlist // (8) | |
} | |
open class Employee(val name:String) { | |
override fun toString(): String { | |
return name | |
} | |
} | |
class Programmer(name:String) : Employee(name) {} | |
class Tester(name:String) : Employee(name) {} |
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