27
3
Consider the Atbash transformation:
A|B|C|D|E|F|G|H|I|J|K|L|M
Z|Y|X|W|V|U|T|S|R|Q|P|O|N
Where A ⇔ Z and L ⇔ O, e.g. There is an interesting property that some words share. When some strings are translated to their atbash-equivalent, said translation is the original word reversed. I call these Atbash Self Palindromes.
As an example, let's translate WIZARD:
W → D I → R Z → A A → Z R → I D → W
The result is DRAZIW, which is WIZARD reversed. Thus, WIZARD is an atbash self palindrome.
Objective Given a string of printable ASCII characters, output or return a truthy value if that string is an atbash self palindrome, and a falsey value otherwise. (This is done through STDIN, closest equivalent, functional input, etc. If your language cannot do any of these, consider choosing a different language you may hardcode the input.) You should do this case-insensitively. If the input is a palindrome and is unaffected by the atbash seqeunce, you should still output true, since a palindrome + itself is a palindrome. This is a code-golf, so the shortest program in bytes wins.
Test cases
"Input" => true, false
"WIZARD" => true
"Wizard" => true // case doesn't matter
"wIzArD" => true
"W I Z A R D" => true
"W IZ ARD" => false // the atbash of this is D RA ZIW, which is not a palindrome of W IZ ARD
"ABCXYZ" => true // ZYXCBA
"345 09%" => false // is not a palindrome
"ev" => true // ve
"AZGDFSSF IJHSDFIU HFIA" => false
"Zyba" => true
"-AZ" => false // -ZA is not a reverse of -AZ
"Tree vvig" => true // Givv eert
"$%%$" => true // palindrome
"A$&$z" => true // z$&$A
Leaderboard
The Stack Snippet at the bottom of this post generates the catalog from the answers a) as a list of shortest solution per language and b) as an overall leaderboard.
To make sure that your answer shows up, please start your answer with a headline, using the following Markdown template:
## Language Name, N bytes
where N
is the size of your submission. If you improve your score, you can keep old scores in the headline, by striking them through. For instance:
## Ruby, <s>104</s> <s>101</s> 96 bytes
If there you want to include multiple numbers in your header (e.g. because your score is the sum of two files or you want to list interpreter flag penalties separately), make sure that the actual score is the last number in the header:
## Perl, 43 + 2 (-p flag) = 45 bytes
You can also make the language name a link which will then show up in the snippet:
## [><>](http://esolangs.org/wiki/Fish), 121 bytes
var QUESTION_ID=68757,OVERRIDE_USER=44713;function answersUrl(e){return"https://api.stackexchange.com/2.2/questions/"+QUESTION_ID+"/answers?page="+e+"&pagesize=100&order=desc&sort=creation&site=codegolf&filter="+ANSWER_FILTER}function commentUrl(e,s){return"https://api.stackexchange.com/2.2/answers/"+s.join(";")+"/comments?page="+e+"&pagesize=100&order=desc&sort=creation&site=codegolf&filter="+COMMENT_FILTER}function getAnswers(){jQuery.ajax({url:answersUrl(answer_page++),method:"get",dataType:"jsonp",crossDomain:!0,success:function(e){answers.push.apply(answers,e.items),answers_hash=[],answer_ids=[],e.items.forEach(function(e){e.comments=[];var s=+e.share_link.match(/\d+/);answer_ids.push(s),answers_hash[s]=e}),e.has_more||(more_answers=!1),comment_page=1,getComments()}})}function getComments(){jQuery.ajax({url:commentUrl(comment_page++,answer_ids),method:"get",dataType:"jsonp",crossDomain:!0,success:function(e){e.items.forEach(function(e){e.owner.user_id===OVERRIDE_USER&&answers_hash[e.post_id].comments.push(e)}),e.has_more?getComments():more_answers?getAnswers():process()}})}function getAuthorName(e){return e.owner.display_name}function process(){var e=[];answers.forEach(function(s){var r=s.body;s.comments.forEach(function(e){OVERRIDE_REG.test(e.body)&&(r="<h1>"+e.body.replace(OVERRIDE_REG,"")+"</h1>")});var a=r.match(SCORE_REG);a&&e.push({user:getAuthorName(s),size:+a[2],language:a[1],link:s.share_link})}),e.sort(function(e,s){var r=e.size,a=s.size;return r-a});var s={},r=1,a=null,n=1;e.forEach(function(e){e.size!=a&&(n=r),a=e.size,++r;var t=jQuery("#answer-template").html();t=t.replace("{{PLACE}}",n+".").replace("{{NAME}}",e.user).replace("{{LANGUAGE}}",e.language).replace("{{SIZE}}",e.size).replace("{{LINK}}",e.link),t=jQuery(t),jQuery("#answers").append(t);var o=e.language;/<a/.test(o)&&(o=jQuery(o).text()),s[o]=s[o]||{lang:e.language,user:e.user,size:e.size,link:e.link}});var t=[];for(var o in s)s.hasOwnProperty(o)&&t.push(s[o]);t.sort(function(e,s){return e.lang>s.lang?1:e.lang<s.lang?-1:0});for(var c=0;c<t.length;++c){var i=jQuery("#language-template").html(),o=t[c];i=i.replace("{{LANGUAGE}}",o.lang).replace("{{NAME}}",o.user).replace("{{SIZE}}",o.size).replace("{{LINK}}",o.link),i=jQuery(i),jQuery("#languages").append(i)}}var ANSWER_FILTER="!t)IWYnsLAZle2tQ3KqrVveCRJfxcRLe",COMMENT_FILTER="!)Q2B_A2kjfAiU78X(md6BoYk",answers=[],answers_hash,answer_ids,answer_page=1,more_answers=!0,comment_page;getAnswers();var SCORE_REG=/<h\d>\s*([^\n,]*[^\s,]),.*?(\d+)(?=[^\n\d<>]*(?:<(?:s>[^\n<>]*<\/s>|[^\n<>]+>)[^\n\d<>]*)*<\/h\d>)/,OVERRIDE_REG=/^Override\s*header:\s*/i;
body{text-align:left!important}#answer-list,#language-list{padding:10px;width:290px;float:left}table thead{font-weight:700}table td{padding:5px}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <link rel="stylesheet" type="text/css" href="//cdn.sstatic.net/codegolf/all.css?v=83c949450c8b"> <div id="answer-list"> <h2>Leaderboard</h2> <table class="answer-list"> <thead> <tr><td></td><td>Author</td><td>Language</td><td>Size</td></tr></thead> <tbody id="answers"> </tbody> </table> </div><div id="language-list"> <h2>Winners by Language</h2> <table class="language-list"> <thead> <tr><td>Language</td><td>User</td><td>Score</td></tr></thead> <tbody id="languages"> </tbody> </table> </div><table style="display: none"> <tbody id="answer-template"> <tr><td>{{PLACE}}</td><td>{{NAME}}</td><td>{{LANGUAGE}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr></tbody> </table> <table style="display: none"> <tbody id="language-template"> <tr><td>{{LANGUAGE}}</td><td>{{NAME}}</td><td>{{SIZE}}</td><td><a href="{{LINK}}">Link</a></td></tr></tbody> </table>
Related: Swap the Alphabet.
– nicael – 2016-01-07T08:07:30.3634AtBash is actually not a new thing. It is the Kabala (Jewish Mysticism) Hebrew letter transformation equivalent to this. Since Hebrew is written only with with wovels, any letter string can be read by inserting random wovels. A-T-B(a)SH is a mnemonic for transforming Alef (first Hebrew letter) to Tav (last), Beis (second) to SHin (next-to-last). – Adám – 2016-01-07T09:17:42.603
Testcase :
A$%$z
--> true ? – edc65 – 2016-01-07T11:22:36.9871Consider giving -1000000 points if someone's solution code is itself an atbash self palindrome? :p – kojiro – 2016-01-07T12:06:07.380
@edc65 yes, that is true. – Conor O'Brien – 2016-01-07T12:11:11.967
@kojiro I might offer a bounty for the shortest nontrivial solution that is an atbash palindrome – Conor O'Brien – 2016-01-07T12:12:14.533
3@kojiro Non-trivial as opposed to
code {Comment-symbol}{Atbash'ed Comment-symbol} Atbash'ed code
... – Adám – 2016-01-07T13:20:39.590@NBZ That is correct. Fortunately, since it's a bounty, I'm the final judge of nontriviality. – Conor O'Brien – 2016-01-07T18:59:19.847
Darn. I thought this challenge was going to require the source program to be an atbash self palindrome as well. – mbomb007 – 2016-01-08T17:24:19.397
1
@mbomb007 I said I may offer a bounty if such a nontrivial program is found
– Conor O'Brien – 2016-01-08T17:28:40.793