Data commit

Task/Show-ASCII-table/Scala/show-ascii-table.scala

@@ -0,0 +1,25 @@
+object AsciiTable extends App {
+  val (strtCharVal, lastCharVal, nColumns) = (' '.toByte, '\u007F'.toByte, 6)
+  require(nColumns % 2 == 0, "Number of columns must be even.")
+
+  val nChars = lastCharVal - strtCharVal + 1
+  val step = nChars / nColumns
+  val threshold = strtCharVal + (nColumns - 1) * step
+
+  def indexGen(start: Byte): LazyList[Byte] =
+    start #:: indexGen(
+      (if (start >= threshold) strtCharVal + start % threshold + 1 else start + step).toByte
+    )
+
+  def k(j: Byte): Char = j match {
+    case `strtCharVal` => '\u2420'
+    case 0x7F => '\u2421'
+    case _ => j.toChar
+  }
+
+  indexGen(strtCharVal)
+    .take(nChars)
+    .sliding(nColumns, nColumns)
+    .map(_.map(byte => f"$byte%3d : ${k(byte)}"))
+    .foreach(line => println(line.mkString("  ")))
+}