volodymyr-korolyov

-- Tested on Postgres 9.2

create or replace temp view cipher as
select 
    'meetmebythetree'::varchar plain_text, 
    'scones'::varchar secret;

with
    -- Recursively add 'secret' until result is longer than 'plain_text'
    recursive secret_stream(repeated_secret) as (

volodymyr-korolyov

package cipher

import Function.tupled

object CipherTable {

  // Key char -> Plain char -> Encoded char
  val encodingTable = ('a' to 'z')
    .map(col => col -> ('a' to 'z').zip((col to 'z') ++ ('a' until col)).toMap)
    .toMap

volodymyr-korolyov

/**
  * Straightforward Scala implementation
  */
object Postfix {

  def main(args: Array[String]): Unit = {
    println(eval("0 1 R"))
    println(eval("0 0 R"))
    println(eval("1 0 A 1 R N N"))
    println(eval("0 0 A 0 N 0 N A R"))