Data commit

Task/Substitution-cipher/Scala/substitution-cipher.scala

@@ -0,0 +1,30 @@
+object SubstitutionCipher extends App {
+  private val key = "]kYV}(!7P$n5_0i R:?jOWtF/=-pe'AD&@r6%ZXs\"v*N" + "[#wSl9zq2^+g;LoB`aGh{3.HIu4fbK)mU8|dMET><,Qc\\C1yxJ"
+  private val text =
+    """"It was still dark, in the early morning hours of the twenty-second of December
+      | 1946, on the second floor of the house at Schilderskade 66 in our town,
+      | when the hero of this story, Frits van Egters, awoke."""".stripMargin
+
+  val enc = encode(text)
+  println("Encoded: " + enc)
+  println("Decoded: " + decode(enc))
+
+  private def encode(s: String) = {
+    val sb = new StringBuilder(s.length)
+    s.map {
+      case c if (' ' to '~').contains(c) => sb.append(key(c.toInt - 32))
+      case _ =>
+    }
+    sb.toString
+  }
+
+  private def decode(s: String) = {
+    val sb = new StringBuilder(s.length)
+    s.map {
+      case c if (' ' to '~').contains(c) =>
+        sb.append((key.indexOf(c.toInt) + 32).toChar)
+      case _ =>
+    }
+    sb.toString
+  }
+}