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-- 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 ( |
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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 |
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open System | |
let resolveEncryptedLetter (letterToEncrypt:char, keywordLetter) = | |
let alphabet = "abcdefghijklmnopqrstuvwxyz" | |
alphabet.Split [| keywordLetter |] | |
|> Array.rev | |
|> Array.append [| keywordLetter |> string |] | |
|> Array.reduce (+) | |
|> Seq.toArray | |
|> fun rowOrderedByKeywordLetter |