Contents

import PhoneNumber._

class PhoneNumber(phoneNumber: String) {

  lazy val parts: Option[Parts] = parse(phoneNumber)

  lazy val number: Option[String] =
    parts map { case (areaCode, prefix, lineNumber) => s"$areaCode$prefix$lineNumber" }

  lazy val areaCode: Option[String] = parts map (_._1)

  lazy val prettyPrint: Option[String]  = 
    parts map { case (areaCode, prefix, lineNumber) => s"($areaCode) $prefix-$lineNumber" }
}

object PhoneNumber {
  type Parts = (String, String, String)

  private[this] val AreaCodeLength = 3
  private[this] val PrefixLength = 3
  private[this] val LineNumberLength = 4

  private[this] val PhoneNumberPattern = {
    def part(length: Int) = s"(\\d{$length})"
    s"""1?${part(AreaCodeLength)}${part(PrefixLength)}${part(LineNumberLength)}""".r
  }

  def parse(phoneNumber: String): Option[Parts] = {
    val digits = phoneNumber filter (_.isDigit)
    digits match {
      case PhoneNumberPattern(areaCode, prefix, lineNumber) =>
        Some((areaCode, prefix, lineNumber))
      case _ => None
    }
  }
}

Version data entries

191 entries across 191 versions & 1 rubygems

Version	Path
trackler-2.1.0.36	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.34	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.33	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.32	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.31	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.30	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.29	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.28	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.27	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.26	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.25	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.24	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.23	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.22	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.21	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.20	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.19	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.18	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.17	tracks/scala/exercises/phone-number/example.scala
trackler-2.1.0.16	tracks/scala/exercises/phone-number/example.scala