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object CaesarCipher {
val examples = Seq(
"THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG",
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
)
def main(args: Array[String]): Unit = {
examples
.map(cipher(_, 3))
.foreach(println)
}
/*
* Simple cipher solution.
* Will break if input is not upper case (or otherwise unexpected).
*/
def cipher(S: String, N: Int): String = {
val abc = 'A' to 'Z'
S.map(c => c.toInt - 65)
.map(_ - N)
.map(c => if (c < 0) abc.length +c else c)
.map(c => if(c < 0) " " else abc(c))
.mkString
}
}
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