Contents

import scala.annotation.tailrec

case class Ocr(grid: String) {

  lazy val convert: String =
    ocrReadoutLines.map(ocrLine => {
      val iterator = ocrLine.iterator
      val line0 = iterator.next()
      val line1 = iterator.next()
      val line2 = iterator.next()
      val line3 = iterator.next()

      toDigits(line0, line1, line2, line3, "")
    }).mkString(",")

  private lazy val ocrReadoutLines = grid.lines.grouped(4)

  @tailrec
  private def toDigits(line0: String, line1: String,
                       line2: String, line3: String,
                       acc: String): String = {
    if (line0.isEmpty || line1.isEmpty || line2.isEmpty || line3.isEmpty) acc
    else {
      val (l0Head, l0Tail) = line0.splitAt(3)
      val (l1Head, l1Tail) = line1.splitAt(3)
      val (l2Head, l2Tail) = line2.splitAt(3)
      val (l3Head, l3Tail) = line3.splitAt(3)

      val ocrDigit = List(l0Head, l1Head, l2Head, l3Head)
      val digit = fontToDigit.getOrElse(ocrDigit, '?')

      toDigits(l0Tail, l1Tail, l2Tail, l3Tail, acc + digit)
    }
  }

  private lazy val fontToDigit = Map(List(" _ "
    , "| |"
    , "|_|"
    , "   ") -> '0',
    List("   "
      , "  |"
      , "  |"
      , "   ") -> '1',
    List(" _ "
      , " _|"
      , "|_ "
      , "   ") -> '2',
    List(" _ "
      , " _|"
      , " _|"
      , "   ") -> '3',
    List("   "
      , "|_|"
      , "  |"
      , "   ") -> '4',
    List(" _ "
      , "|_ "
      , " _|"
      , "   ") -> '5',
    List(" _ "
      , "|_ "
      , "|_|"
      , "   ") -> '6',
    List(" _ "
      , "  |"
      , "  |"
      , "   ") -> '7',
    List(" _ "
      , "|_|"
      , "|_|"
      , "   ") -> '8',
    List(" _ "
      , "|_|"
      , " _|"
      , "   ") -> '9')
}

Version data entries

233 entries across 233 versions & 1 rubygems

Version	Path
trackler-2.2.1.15	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.14	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.13	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.12	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.11	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.10	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.9	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.8	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.7	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.6	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.5	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.4	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.3	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.2	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.1	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.1.0	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.0.6	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.0.5	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.0.4	tracks/scala/exercises/ocr-numbers/example.scala
trackler-2.2.0.3	tracks/scala/exercises/ocr-numbers/example.scala