behaghel

    // type WithOID = { def id: ObjectId }
    trait WithOID { def id: ObjectId }
    sealed trait QueryParams[WithOID]
    case class All[WithOID]() extends QueryParams[WithOID]
    case class Paginated[Song](pageSize: Int, pageOffset: Int,
                            from: Option[Song] = None) extends QueryParams[WithOID] {
      def enrich(criteria: MongoDBObject) =
            from map { a =>
              criteria ++ {
                if (pageOffset >= 0)

behaghel

    // type WithOID = { def id: ObjectId }
    trait WithOID { def id: ObjectId }
    sealed trait QueryParams[WithOID]
    case class All[WithOID]() extends QueryParams[WithOID]
    case class Paginated[WithOID](pageSize: Int, pageOffset: Int,
                            from: Option[WithOID] = None) extends QueryParams[WithOID] {
      def enrich(criteria: MongoDBObject) =
            from map { a =>
              criteria ++ {
                if (pageOffset >= 0)

behaghel

    type WithOID = { def id: ObjectId }
    // trait WithOID { def id: ObjectId }
    sealed trait QueryParams[WithOID]
    case class All[WithOID]() extends QueryParams[WithOID]
    case class Paginated[WithOID](pageSize: Int, pageOffset: Int,
                            from: Option[{def id: ObjectId}] = None) extends QueryParams[WithOID] {
      def enrich(criteria: MongoDBObject): MongoDBObject =
            from.map { x: {def id: ObjectId } =>
              criteria ++ {
                if (pageOffset >= 0)

behaghel

[INFO] [scala:compile {execution: default}]
[INFO] Checking for multiple versions of scala
[INFO] includes = [**/*.scala,**/*.java,]
[INFO] excludes = []
[INFO] /home/hub/p/eee/src/main/scala:-1: info: compiling
[INFO] Compiling 128 source files to /home/hub/p/eee/target/classes at 1312794546514
[INFO] Recompiling 1 files
[ERROR] /home/hub/p/eee/src/main/scala/Service.scala:72: error: type mismatch;
[ERROR] found : Unit
[ERROR] required: () => Any

behaghel

[INFO] [scala:compile {execution: default}]
[INFO] Checking for multiple versions of scala
[INFO] includes = [**/*.scala,**/*.java,]
[INFO] excludes = []
[INFO] /home/hub/p/eee/src/main/scala:-1: info: compiling
[INFO] Compiling 128 source files to /home/hub/p/eee/target/classes at 1312794546514
[INFO] Recompiling 1 files
[ERROR] /home/hub/p/eee/src/main/scala/Service.scala:72: error: type mismatch;
[INFO] found : Unit
[INFO] required: () => Any

behaghel

  case class Person(firstname: String, lastname: String)

  type MongoReader[T] = MongoDBObject => T
  type MongoWriter[T] = T => MongoDBObject

  def readArray[T : MongoReader](name: String) = new MongoReader[List[T]] {
    def apply(dbo: MongoDBObject) = {
      println("dbo = %s".format(dbo.toString))
      println("dbo.%s = %s".format(name, dbo.as[BasicDBList](name).toString))

behaghel

set nocompatible      " must be the first line
filetype on
filetype indent on
filetype plugin on


"" General options
set bg=dark
syntax on
set number

behaghel

package patmat

import scala.language.postfixOps
import common._

/**
 * Assignment 4: Huffman coding
 *
 */
object Huffman {

behaghel

  implicit class RichMap[K, V](m: Map[K, V]) {
    def updateValue(k: K)(f: Option[V] => V): Map[K, V] = m + (k -> f(m get k))
    def incValue(k: K)(implicit ev: Numeric[V]): Map[K, V] =
      updateValue(k){ o =>
        val one = ev.fromInt(1)
        o map { ev.plus(_, one) } getOrElse one
    }
  

behaghel

%s should %s be balanced".format(s,
                                               if (!expected) "NOT" else ""))
    testBalance("(if (zero? x) max (/ 1 x))")
    testBalance("I told him (that it's not (yet) done)." +
                      "(But he wasn’t listening)")
    testBalance(":-)", expected = false)
    testBalance("())(", expected = false)

  }