ZipWith adds a zipWith(f: A => B): C[(A, B)] to any collection

ZipWith.scala

object ZipWith {
  implicit def pimpToZipWith[A, CC[A] <: Iterable[A]](cc: CC[A]) = new ZipWith(cc)

  class ZipWith[A, CC[A] <: Iterable[A]](cc: CC[A]) {
    import collection.generic.CanBuildFrom

    def zipWith[B](f: A => B)(implicit cbf: CanBuildFrom[CC[A], (A, B), CC[(A, B)]]): CC[(A, B)] = {
      val builder = cbf()
      cc foreach { a => builder += (a -> f(a)) }
      builder.result
    }
  }
}

usage:

scala> import ZipWith._
import ZipWith._

scala> val is = List(1, 2, 3)
is: List[Int] = List(1, 2, 3)

scala> is zipWith (_ + 100)
res0: List[(Int, Int)] = List((1,101), (2,102), (3,103))