Overhauled Atbash (#141)

Author: Fleshgrinder

Makefile

@@ -17,3 +17,7 @@ problems/%:
 clean: ## Delete all log files produced by the test script for failing tests.
 	shopt -s globstar
 	rm -f problems/**/*.exe problems/**/*.log
+
+executables:
+	shopt -s extglob globstar
+	chmod +x problems/**/*.+(bash|dart|jl|js|kt|kts|php|py|rb|sh|ts|zsh)

problems/atbash/README.md

@@ -1,13 +1,29 @@
-Atbash is a simple substitution cipher originally for the Hebrew alphabet, but possible with any known alphabet.
-```
- Original:   abcdefghijklmnopqrstuvwxyz  
- Substitute: ZYXWVUTSRQPONMLKJIHGFEDCBA
-```
+# Atbash
 
-So you would substitute "a" in your input text with "Z" in your output text, "b" with "Y", "c" with "X" and so forth.
+[Atbash] is a simple substitution cipher originally for the Hebrew alphabet, but
+possible with any known alphabet.
 
-A few English words also 'Atbash' into other English words: "irk"="rip", "low"="old", "hob"="sly", "hold"="slow", "holy"="slob", "horn"="slim", "glow"="told", "grog"="tilt" and "zoo"="all". Some other English words Atbash into their own reverses, e.g., "wizard" = "draziw."
+Original: `abcdefghijklmnopqrstuvwxyz`
+Substitute: `zyxwvutsrqponmlkjihgfedcba`
 
-(https://en.wikipedia.org/wiki/Atbash)
+So you would substitute `a` in your input text with `Z` in your output text,
+`b` with `Y`, `c` with `X` and so forth.
+
+A few English words also _Atbash_ into other English words:
+
+* irk = rip
+* low = old
+* hob = sly
+* hold = slow
+* holy = slob
+* horn = slim
+* glow = told
+* grog = tilt
+* zoo = all
+
+Some other English words _Atbash_ into their own reverses, e.g. _wizard_ becomes
+_draziw_.
+
+[Atbash]: https://en.wikipedia.org/wiki/Atbash
 
 

problems/atbash/atbash.cs

@@ -0,0 +1,11 @@
+abcdefghijklmnopqrstuvwxyz
+irk
+low
+hob
+hold
+holy
+horn
+glow
+grog
+zoo
+wizard

problems/atbash/atbash.go

@@ -0,0 +1,11 @@
+zyxwvutsrqponmlkjihgfedcba
+rip
+old
+sly
+slow
+slob
+slim
+told
+tilt
+all
+draziw

problems/atbash/atbash.js

@@ -0,0 +1,14 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+declare -i a z
+a=$(printf %d \'a)
+z=$(printf %d \'z)
+for ((i = 0; i < ${#1}; i++)); do
+    if [[ "${1:$i:1}" == $'\n' ]]; then
+        echo
+    else
+        # shellcheck disable=SC2059
+        printf "\x$(printf %x $((z - ($(printf %d "'${1:$i:1}") - a))))"
+    fi
+done

problems/atbash/atbash.kt

@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main(__attribute__ ((unused)) const int argc, const char* argv[]) {
+    for (int i = 0; argv[1][i] != '\0'; i++) {
+        printf("%c", argv[1][i] == '\n' ? '\n' : 'z' - (argv[1][i] - 'a'));
+    }
+}

problems/atbash/atbash.php

@@ -0,0 +1,9 @@
+#include <iostream>
+#include <string>
+
+int main(int, const char* argv[]) {
+    std::string s = argv[1];
+    for (auto c: s) {
+        std::cout << (c == '\n' ? c : (char) ('z' - (c - 'a')));
+    }
+}

problems/atbash/atbash.py

@@ -0,0 +1,14 @@
+using System;
+
+namespace Atbash {
+    class Program {
+        static void Main(string[] args) {
+            const int z = (int) 'z';
+            const int a = (int) 'a';
+            string s = args[0];
+            foreach (char c in s) {
+                Console.Write(c == '\n' ? c : (char) (z - (((int)c) - a)));
+            }
+        }
+    }
+}

problems/atbash/atbash.rs

@@ -0,0 +1,12 @@
+#!/usr/bin/env dart
+
+import 'dart:io';
+
+void main(List<String> arguments) {
+  int a = 'a'.codeUnitAt(0);
+  int z = 'z'.codeUnitAt(0);
+  int lf = '\n'.codeUnitAt(0);
+  arguments[0].runes.forEach((int c) {
+    stdout.write(String.fromCharCode(c == lf ? c : z - (c - a)));
+  });
+}

problems/atbash/atbash.ts

@@ -0,0 +1,16 @@
+package main
+
+import (
+    "fmt"
+    "os"
+)
+
+func main() {
+    for _, c := range os.Args[1] {
+        if c == '\n' {
+            fmt.Println()
+        } else {
+            fmt.Printf("%c", 'z'-(c-'a'))
+        }
+    }
+}

problems/atbash/data/001.in

@@ -0,0 +1,7 @@
+class solution {
+    public static void main(String[] args) {
+        for (char c : args[0].toCharArray()) {
+            System.out.print(c == '\n' ? c : (char) ('z' - (c - 'a')));
+        }
+    }
+}

problems/atbash/data/001.out

@@ -0,0 +1,3 @@
+#!/usr/bin/env julia
+
+for c in ARGS[1] print(c == '\n' ? c : 'z' - (c - 'a')) end

problems/atbash/solution.bash

@@ -0,0 +1,8 @@
+#!/usr/bin/env node
+
+const z = 'z'.charCodeAt(0);
+const a = 'a'.charCodeAt(0);
+const s = process.argv[2];
+for (let i = 0; i < s.length; ++i) {
+    process.stdout.write(s[i] === '\n' ? '\n' : String.fromCharCode(z - (s.charCodeAt(i) - a)));
+}

problems/atbash/solution.c

@@ -0,0 +1,3 @@
+#!/usr/bin/env kscript
+
+args[0].forEach { print(if (it == '\n') it else 'z' - (it - 'a')) }

problems/atbash/solution.cpp

@@ -0,0 +1,10 @@
+#!/usr/bin/env php
+<?php
+
+$z = ord('z');
+$a = ord('a');
+$s = $argv[1];
+$l = strlen($argv[1]);
+for ($i = 0; $i < $l; ++$i) {
+    echo $s[$i] === "\n" ? "\n" : chr($z - (ord($s[$i]) - $a));
+}

problems/atbash/solution.cs

@@ -0,0 +1,8 @@
+#!/usr/bin/env python3
+
+import sys
+
+z = ord('z')
+a = ord('a')
+for c in sys.argv[1]:
+    print('\n' if c == '\n' else chr(z - (ord(c) - a)), end="")

problems/atbash/solution.dart

@@ -0,0 +1,7 @@
+#!/usr/bin/env ruby
+
+a='a'.ord
+z='z'.ord
+ARGV[0].each_char do |c|
+  print(c === "\n" ? c : (z - (c.ord - a)).chr)
+end