Scala LINQ-like impl memo

gistfile1.scala

// ----------------------------------------
// * Scala LINQ-like impl memo
// http://scala-programming-language.1934581.n4.nabble.com/scala-LINQ-for-scala-td2003452.html
// https://github.com/vladimirk/scalalinq/blob/master/src/scalalinq/linq.scala
// ----------------------------------------

class linq[A](seq: Seq[A]) {
  def where(p: A => Boolean) = seq filter p
  def select[B](p: A => B) = seq map p
  def orderby[B <% Ordered[B]](f: A => B) = seq.toList sort ((a, b) => f(a) < f(b))
  def ascending = seq
  def descending = seq reverse
}
object linq {
  implicit def from[A](s: Seq[A]) = new linq(s);
  def self[A] = (x: A) => x
}

import scala.xml._
import linq._

val doc = <root><value>1</value><value>6</value><value>3</value><value>2</value><value>5</value></root> 
val result = from (doc \ "value") where (_.text.toInt % 2 == 1) select (_.text.toInt * 2) orderby self descending
// result: Seq[Int] = List(10, 6, 2)