进制转换

gistfile1.scala

import scala.math._
def toNum(base:Int, src: List[Int]): Int = (base, src) match { 
  case (_,Nil) => 0
  case (b, (x::xs)) => x * pow(b,xs.length).toInt + toNum(b,xs)
}

=======================
scala> toNum(10,List(1,2,3,4))
res7: Int = 1234

scala> toNum(16,List(1,2,3,4))
res8: Int = 4660

scala> toNum(16,List(11,15))
res9: Int = 191

scala> toNum(2,List(1,0,1))
res10: Int = 5