Data commit

Task/Align-columns/Scala/align-columns-1.scala

@@ -0,0 +1,28 @@
+object ColumnAligner {
+  val eol = System.getProperty("line.separator")
+  def getLines(filename: String) = scala.io.Source.fromPath(filename).getLines(eol)
+  def splitter(line: String) = line split '$'
+  def getTable(filename: String) = getLines(filename) map splitter
+  def fieldWidths(fields: Array[String]) = fields map (_ length)
+  def columnWidths(txt: Iterator[Array[String]]) = (txt map fieldWidths).toList.transpose map (_ max)
+
+  def alignField(alignment: Char)(width: Int)(field: String) = alignment match {
+    case 'l' | 'L' => "%-"+width+"s" format field
+    case 'r' | 'R' => "%"+width+"s" format field
+    case 'c' | 'C' => val padding = (width - field.length) / 2; " "*padding+"%-"+(width-padding)+"s" format field
+    case _ => throw new IllegalArgumentException
+  }
+
+  def align(aligners: List[String => String])(fields: Array[String]) =
+    aligners zip fields map Function.tupled(_ apply _)
+
+  def alignFile(filename: String, alignment: Char) = {
+    def table = getTable(filename)
+    val aligners = columnWidths(table) map alignField(alignment)
+    table map align(aligners) map (_ mkString " ")
+  }
+
+  def printAlignedFile(filename: String, alignment: Char) {
+    alignFile(filename, alignment) foreach println
+  }
+}

Task/Align-columns/Scala/align-columns-2.scala

@@ -0,0 +1,22 @@
+def pad(s:String, i:Int, d:String) = {
+  val padsize = (i-s.length).max(0)
+  d match {
+    case "left" => s+" "*padsize
+    case "right" => " "*padsize+s
+    case "center" => " "*(padsize/2) + s + " "*(padsize-padsize/2)
+  }
+}
+
+val lines = scala.io.Source.fromFile("c:\\text.txt").getLines.map(_.trim())
+val words = lines.map(_.split("\\$").toList).toList
+val lens = words.map(l => l.map(_.length)).toList
+
+var maxlens = Map[Int,Int]() withDefaultValue 0
+lens foreach (l =>
+  for(i <- (0 until l.length)){
+    maxlens += i -> l(i).max(maxlens(i))
+  }
+)
+
+val padded = words map ( _.zipWithIndex.map{case(s,i)=>pad(s,maxlens(i),"center")+" "} )
+padded map (_.reduceLeft(_ + _)) foreach println