Ot wes thi bist uf tomis

Question

I just love this simple cypher, it's so fun reading not-quite human-readable words and filling the gaps...

Ot wes thi bist uf tomis, ot wes thi wurst uf tomis, 
ot wes thi egi uf wosdum, ot wes thi egi uf fuuloshniss, 
ot wes thi ipuch uf biloif, ot wes thi ipuch uf oncridaloty, 
ot wes thi siesun uf loght, ot wes thi siesun uf derkniss, 
ot wes thi sprong uf hupi, ot wes thi wontir uf dispeor, 
wi hed ivirythong bifuri as, wi hed nuthong bifuri as, 
wi wiri ell guong dorict tu hievin, wi wiri ell guong dorict thi uthir wey – 
on shurt, thi piroud wes su fer loki thi prisint piroud, 
thet sumi uf ots nuosoist eathurotois onsostid un ots biong riciovid, 
fur guud ur fur ivol, on thi sapirletovi digrii uf cumperosun unly.

The rules are super-simple:

• Accept some text as input (ascii characters, upper/lower case letters and punctuation).
• For each vowel, rotate it to the next vowel, or back to the start.
  • a => e
  • e => i
  • i => o
  • o => u
  • u => a
• Upper case vowels stay upper case, lower case vowels stay lower case.
• Output the text after these conversions.
• No need to support accents.
• The all other characters should remain unchanged.
• Try to do it in the smallest number of bytes.
• Any old language you like.

---

Test Cases

It was the best of times, it was the worst of times,
it was the age of wisdom, it was the age of foolishness,
it was the epoch of belief, it was the epoch of incredulity,
it was the season of light, it was the season of darkness,
it was the spring of hope, it was the winter of despair,
we had everything before us, we had nothing before us,
we were all going direct to heaven, we were all going direct the other way –
in short, the period was so far like the present period,
that some of its noisiest authorities insisted on its being received,
for good or for evil, in the superlative degree of comparison only.

Out:

Ot wes thi bist uf tomis, ot wes thi wurst uf tomis, 
ot wes thi egi uf wosdum, ot wes thi egi uf fuuloshniss, 
ot wes thi ipuch uf biloif, ot wes thi ipuch uf oncridaloty, 
ot wes thi siesun uf loght, ot wes thi siesun uf derkniss, 
ot wes thi sprong uf hupi, ot wes thi wontir uf dispeor, 
wi hed ivirythong bifuri as, wi hed nuthong bifuri as, 
wi wiri ell guong dorict tu hievin, wi wiri ell guong dorict thi uthir wey – 
on shurt, thi piroud wes su fer loki thi prisint piroud, 
thet sumi uf ots nuosoist eathurotois onsostid un ots biong riciovid, 
fur guud ur fur ivol, on thi sapirletovi digrii uf cumperosun unly.

In:

The quick brown fox jumps over the lazy dog.

Out:

Thi qaock bruwn fux jamps uvir thi lezy dug.

In:

Home is where the heart is.

Out:

Humi os whiri thi hiert os.

In:

Boaty McBoatface

Out:

Buety McBuetfeci

In:

AEIOUaeiou

Out:

EIOUAeioua

In:

Programming Puzzles And Code Golf

Out:

Prugremmong Pazzlis End Cudi Gulf

Answer 1

MS-SQL, 51 Bytes

Works on SQL 2017 or above:

SELECT TRANSLATE(v,'AEIOUaeiou','EIOUAeioua')FROM t

The new function TRANSLATE performs individual character replacement, so is ideally suited for this challenge.

Input is via a pre-existing table t with varchar column v, per our IO rules.

In this case the table must be created using a case-sensitive collation, either by running on a case-sensitive server, or by using the COLLATE keyword (not counted toward character total):

CREATE TABLE t(v varchar(max) COLLATE Latin1_General_CS_AS)

EDIT: SSMS may cut off the lengthy quote above when returning the result in a "results to text" window, this is a client setting, not a bug in my program.

To fix, go to Tools > Options > Query Results > SQL Server > Results to Text and increase the "Maximum number of characters displayed in each column."

Answer 2

Bash + coreutils, 24

tr aeiouAEIOU eiouaEIOUA

Try it online!

Answer 3

Haskell, 52 bytes

(a:b)!c|a/=c=b!c|1>0=b!!0
a!b=b
map("aeiouaAEIOUA"!)

Try it online!

Lynn saved me two bytes by pointing out that !!0 is shorter than head.

Explanation

If you have never coded in Haskell this will probably look like a pile of jibberish. So first let's ungolf it and then break it down:

(a:b)!c
 |   a/=c   = b!c
 |otherwise = b!!0
a!b=b
map("aeiouaAEIOUA"!)

First we have a function !, which takes a string s and a character c. Our first pattern match catches accepts input if the string is non-empty. If the string is non-empty we compare its first character to c. If it's first character is not equal to c we toss it and call ! again with the remainder of the string and c. If it is equal we return the second character in the string.

Our next pattern match catches the string in all other cases, that is if the string is empty. In this case we just return c.

All in all this function takes a character c and a string s and returns the character after the first occurrence of c in s. If we pass this with aeiouaAEIOUA it will perform our cipher on a single character. To make our whole function we ought to map this across the string.

Answer 4

Stax, 7 bytes

öΦΣòC└∞

Run and debug it

Try it online!

Explanation (unpacked)

Vv:tVV:t
Vv:t           #Push aeiou and ring translate it to input
    VV:t       #Push AEIOU and ring translate it to input

Might be able to save more, will keep trying.

Answer 5

Retina, 10 9 8 bytes

T`uo`vVA

Try it online!

Saved 1 byte thanks to Neil! And another byte thanks to Martin!

The new version of retina has vowel classes, which makes the result a bit shorter. The transliteration also makes use of the "other" class. So the to class looks like "aeiouAEIOUA" while the from class looks like "uaeiouAEIOUA"

This doesn't cause any problems since the second u mapping to A will never be done since u was already mapped to a.

Answer 6

Perl 5 + -p, 24 23 bytes

y;AEIOUaeiou;EIOUAeioua

Try it online

-1 byte thanks to @DomHastings

Answer 7

C, 85 76 67 65 64 bytes

f(char*c){for(;*c;)putchar(1[index("AEIOUAaeioua",*c++)?:c-2]);}

Port of Kevin Cruijssen's Java answer. Try it online here.

Thanks to Kevin Cruijssen for golfing 9 bytes, to Christoph for golfing 11 bytes and to ceilingcat for golfing 1 byte.

Ungolfed version:

f(char* c) { // function taking a char array as parameter and implicitly returning an unused int
    for(; *c ;) // loop over the input
        putchar(1 [index("AEIOUAaeioua", * c++) ?: c-2]); // find the first pointer to the current char in the vowels string, NULL if not present; if it's not NULL, print the next vowel, otherwise just print the char
}

Answer 8

Python 3, 62 59 bytes

lambda x:x.translate(dict(zip(b'aeiouAEIOU','eiouaEIOUA')))

Make a translation table (dictionary) with str's static str.maketrans method. Translate relevant characters to their destination character.

EDIT: Saved 3 bytes by using the dict constructor to make the translation table instead of the str#maketrans method

Answer 9

R, 43 bytes

chartr("AEIOUaeiou","EIOUAeioua",scan(,""))

Try it online!

Here's my solution wrapped in a cat to get it to print out more nicely: Try it online!

Answer 10

Ruby -p, 31 bytes

$_.tr!"AEIOUaeiou","EIOUAeioua"

Try it online!

Answer 11

Jelly, 11 bytes

Øcs5ṙ€-Ẏ,Ʋy

Try it online!

Answer 12

Python 2, 79 68 67 bytes

-1 byte thanks to @ArnoldPalmer

V='uaeiouAEIOUA'
print''.join((V[1:]+c)[V.find(c)]for c in input())

Try it online!

Answer 13

JavaScript (ES6), 60 bytes

s=>s.replace(/./g,c=>(S='aeiouaAEIOUA'+c+c)[S.indexOf(c)+1])

Try it online!

Answer 14

Pyth, 17 bytes

em=.rQdrB"aeiou"1

Try it here

em=.rQdrB"aeiou"1
 m                  For each string...
       rB"aeiou"1   ... in ['aeiou', 'AEIOU']...
  =.rQd             ... cyclically rotate the characters in the input.
e                   Take the last.

Answer 15

Japt 2.0, 25 21 bytes

I had fun golfing this one with Shaggy.

r\v@=`aeia`pu)g1+UbX

Run it here.

Answer 16

Java 10, 97 87 bytes

s->{for(var c:s){var t="AEIOUAaeioua"+c+c;System.out.print(t.charAt(t.indexOf(c)+1));}}

-10 bytes after being inspired by @Arnauld's JavaScript answer (his 60-bytes version).

Try it online.

Explanation:

s->{                         // Method with character-array parameter and no return-type
  for(var c:s){              //  Loop over the input characters
    var t="AEIOUAaeioua"     //  Temp-String containing the order of vowels 
                             //  (including additional 'A' and 'a'),
          +c+c;              //  appended with two times the current character
    System.out.print(        //  Print:
      t.charAt(              //   The character in String `t` at index:
         t.indexOf(c)+1));}} //    The (first) index of the current character in `t` + 1

Answer 17

05AB1E, 14 13 11 bytes

žMDÀ‡žMuDÀ‡

Try it online!

Answer 18

Retina 0.8.2, 20 bytes

T`_o`A\EI\OUAaei\oua

Try it online! Link includes test cases.

Answer 19

APL+WIN, 55 bytes

Prompts for input string:

i←(10≥n←'AEIOUaeiou'⍳s)/⍳⍴s←⎕⋄s[i]←'EIOUAeioua'[n~11]⋄s

Answer 20

Mumps, 38 bytes

R T W $TR(T,"AEIOUaeiou","EIOUAeioua")

Mumps doesn't normally add a carriage return, as I didn't see a requirement to separate input from output it does look a bit weird on first run. For example, the output for the last test case looks like this:

Programming Puzzles And Code GolfPrugremmong Pazzlis End Cudi Gulf

If you did want to add a carriage return, add two bytes thusly:

R T W !,$TR(T,"AEIOUaeiou","EIOUAeioua")

Answer 21

Vim + tpope/vim-abolish, 30 bytes

:%S/{a,e,i,o,u}/{e,i,o,u,a}/g<cr>

Alternate solution, also 30 bytes:

Oe,i,o,u<esc>|D:%s/{a,<C-r>"}/{<C-r>",a}/g

According to meta, vim answers can use plugins with no byte penalty. This is not a vim answer, but a vim + abolish answer.

---

Abolish is an extremely useful plugin. This section of the README nicely describes how this command (the Subvert command) works.

Answer 22

CJam, 29 19 bytes

q"aeioua"_eu+_1m<er

Try it online!

-10 bytes thanks to @Peter Taylor

Explanation:

q                       # take all input
 "aeioua"               # push vowel pairs
         _eu            # duplicate, uppercase
            +_          # concatenate, duplicate again
              1m<       # rotate left by 1
                 er     # transliterate

Answer 23

AutoHotkey, 24 bytes

AuotHotkey automatically replaces letters in a case sensitive manner.

a::e
e::i
i::o
o::u
u::a

Answer 24

Vyxal, 9 bytes

k∨:½ƛǓ;∑Ŀ

Try it Online!

Basic transliteration.

Answer 25

Elm, 127 123 121 112 103 bytes

9 bytes saved by Hydrazer

f a b=case a of
 c::d::e->if c==b then d else f(d::e)b
 _->b
String.map(String.toList"aeiouaAEIOUA"|>f)

Explanation

This Elm answer is a port of my Haskell answer. I am still learning Elm so there might be a good deal of golfing that can be done. There are a couple of differences here between Elm and Haskell. Elm does not allow multiple declarations of a function so we have to use case instead. Elm is also rather fussy about strings. They are not list of characters and thus have to be treated differently then lists. In fact in order to do any useful of manipulations on strings we pretty much have to just convert them to lists. Aside from that there are a couple of small differences :: is the list cons operator and (|>)=flip($).

You can test the code here, with the following wrapper:

import Html exposing (text)
f a b=case a of
 c::d::e->if c==b then d else f(d::e)b
 _->b
g=String.map(String.toList"aeiouaAEIOUA"|>f)
main=g"It was a dark and stormy night"|>text

Answer 26

Vyxal, 6 bytes

kv*kV*

Try it Online!

  *    # Ring translate by
kv     # Lowercase vowels
     * # Ring translate by
   kV  # Uppercase vowels

Answer 27

K (ngn/k), 25 bytes

{y^'x[<x]x?y}"UAEIOuaeio"

Try it online!

Answer 28

PHP, 90 Bytes

Try it online

Code

function f($s){echo strtr($s,array_combine(str_split(UuAaEeIiOo),str_split(AaEeIiOoUu)));}

Explanation

function f($s){
 echo strtr(
       $s,                          #The string to operate
       array_combine(               #combining arrays
            str_split(UuAaEeIiOo),  #splitting this strings
            str_split(AaEeIiOoUu))
              # With array combine php creates an array like
              # ["U"=>"A", "a"=>"e"....and so on]
              # strtr can replace strings in a string, using an array with 
              # the values to replace and with what replace each value.
 );
}

75 Bytes if ran with php -r using $argv

<?=strtr($argv,array_combine(str_split(UuAaEeIiOo),str_split(AaEeIiOoUu)));

Answer 29

J, 33 bytes

rplc'aeiou',&((;"0)1&|.)'AEIOU'"1

Try it online!

Answer 30

str, 18 bytes

[aeiouaAEIOUA]#D#U

Try it online!

Explanation

                       implicit: over each character of the input:
[aeiouaAEIOUA]#D#U
[            ]         push this string
              #D       set this to the operation domain
                #U     set the charcter to the next character in the domain