scala map

gistfile1.scala

object testests {

def main(args: Array[String]): Unit = {		
def mapper:Int=>Int= x=>x*x
val s= Seq( -2,-2,2,2 )
val themax= s.map(mapper).max

val tmp= s.filter( mapper(_)==themax)
val tmp2= s.foldLeft(Seq[Int]())((res, elem) => {val e = mapper(elem);  if(res.isEmpty || e>res.head) Seq(e) else if (e== res.head)  res++Seq(e) else res })

val mappedS = s.map(mapper) //map done only once 
val m = mappedS.max // find the max
val tmp3 = mappedS.filter(_ == m) // keep only maximal elements

println(tmp)
println(tmp2)
println(tmp3)
}

}