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import scala.language.{ higherKinds }
object Test {
def benchmarkA(num: Int): Unit = {
type A = Int
def updateM[M[_]](ms: M[A], update: (M[A], A)=>M[A]): M[A] = {
var is = ms
for (i <- 0 until num) is = update(is, i)
is
}
//
def vectorAppend: Vector[A] = updateM[Vector](Vector(), (as, a)=>{
val v = (as :+ a)
//println("==>append: i: "+i1+", v: "+v)
v
})
// this will crash, Vector bug!
def vectorRemove(vec: Vector[A]): Vector[A] = updateM[Vector](vec, (as, a)=>{
val v = (as filterNot{ _ == a})
//val v = (is filter{ _ != i})
//println("==>remove: i: "+a)
v
})
val ct = vectorAppend
println(" append [num: "+num+"] vec")
vectorRemove(ct)
println(" remove [num: "+num+"] vec")
} // BenchmarkA
def comparison(num: Int): Unit = {
for (i <- 1 until 5) benchmarkA(num*i)
println(">> comparison done, num: "+num);
}
def main(args: Array[String]): Unit = {
try {
//createBenchmarkA(23).testRun
comparison(200) // OK
comparison(2000) // this will crach
} catch {
case e: Exception => e.printStackTrace()
}
}
}
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