125
\$\begingroup\$

Create the shortest possible obfuscated program that displays the text "Hello World".

In order to be considered an obfuscated program, it must meet at least two of the following requirements:

  • Does not contain the characters: h, l, w and d in any case
  • Does not contain the characters: e, o, r, 0, and 1 in any case
  • Does not contain the characters: 2 or 7

Input:
none

Output:
Hello World

Leaderboard

Here is a Stack Snippet to generate both a regular leaderboard and an overview of winners by language.

/* Configuration */

var QUESTION_ID = 307; // Obtain this from the url
// It will be like https://XYZ.stackexchange.com/questions/QUESTION_ID/... on any question page
var ANSWER_FILTER = "!t)IWYnsLAZle2tQ3KqrVveCRJfxcRLe";
var COMMENT_FILTER = "!)Q2B_A2kjfAiU78X(md6BoYk";
var OVERRIDE_USER = 48934; // This should be the user ID of the challenge author.

/* App */

var answers = [], answers_hash, answer_ids, answer_page = 1, more_answers = true, comment_page;

function answersUrl(index) {
  return "https://api.stackexchange.com/2.2/questions/" +  QUESTION_ID + "/answers?page=" + index + "&pagesize=100&order=desc&sort=creation&site=codegolf&filter=" + ANSWER_FILTER;
}

function commentUrl(index, answers) {
  return "https://api.stackexchange.com/2.2/answers/" + answers.join(';') + "/comments?page=" + index + "&pagesize=100&order=desc&sort=creation&site=codegolf&filter=" + COMMENT_FILTER;
}

function getAnswers() {
  jQuery.ajax({
    url: answersUrl(answer_page++),
    method: "get",
    dataType: "jsonp",
    crossDomain: true,
    success: function (data) {
      answers.push.apply(answers, data.items);
      answers_hash = [];
      answer_ids = [];
      data.items.forEach(function(a) {
        a.comments = [];
        var id = +a.share_link.match(/\d+/);
        answer_ids.push(id);
        answers_hash[id] = a;
      });
      if (!data.has_more) more_answers = false;
      comment_page = 1;
      getComments();
    }
  });
}

function getComments() {
  jQuery.ajax({
    url: commentUrl(comment_page++, answer_ids),
    method: "get",
    dataType: "jsonp",
    crossDomain: true,
    success: function (data) {
      data.items.forEach(function(c) {
        if (c.owner.user_id === OVERRIDE_USER)
          answers_hash[c.post_id].comments.push(c);
      });
      if (data.has_more) getComments();
      else if (more_answers) getAnswers();
      else process();
    }
  });  
}

getAnswers();

var SCORE_REG = /<h\d>\s*([^\n,]*[^\s,]),.*?(\d+)(?=[^\n\d<>]*(?:<(?:s>[^\n<>]*<\/s>|[^\n<>]+>)[^\n\d<>]*)*<\/h\d>)/;

var OVERRIDE_REG = /^Override\s*header:\s*/i;

function getAuthorName(a) {
  return a.owner.display_name;
}

function process() {
  var valid = [];
  
  answers.forEach(function(a) {
    var body = a.body;
    a.comments.forEach(function(c) {
      if(OVERRIDE_REG.test(c.body))
        body = '<h1>' + c.body.replace(OVERRIDE_REG, '') + '</h1>';
    });
    
    var match = body.match(SCORE_REG);
    if (match)
      valid.push({
        user: getAuthorName(a),
        size: +match[2],
        language: match[1],
        link: a.share_link,
      });
    
  });
  
  valid.sort(function (a, b) {
    var aB = a.size,
        bB = b.size;
    return aB - bB
  });

  var languages = {};
  var place = 1;
  var lastSize = null;
  var lastPlace = 1;
  valid.forEach(function (a) {
    if (a.size != lastSize)
      lastPlace = place;
    lastSize = a.size;
    ++place;
    
    var answer = jQuery("#answer-template").html();
    answer = answer.replace("{{PLACE}}", lastPlace + ".")
                   .replace("{{NAME}}", a.user)
                   .replace("{{LANGUAGE}}", a.language)
                   .replace("{{SIZE}}", a.size)
                   .replace("{{LINK}}", a.link);
    answer = jQuery(answer);
    jQuery("#answers").append(answer);

    var lang = a.language;
    if (/<a/.test(lang)) lang = jQuery(lang).text();
    
    languages[lang] = languages[lang] || {lang: a.language, user: a.user, size: a.size, link: a.link};
  });

  var langs = [];
  for (var lang in languages)
    if (languages.hasOwnProperty(lang))
      langs.push(languages[lang]);

  langs.sort(function (a, b) {
    if (a.lang > b.lang) return 1;
    if (a.lang < b.lang) return -1;
    return 0;
  });

  for (var i = 0; i < langs.length; ++i)
  {
    var language = jQuery("#language-template").html();
    var lang = langs[i];
    language = language.replace("{{LANGUAGE}}", lang.lang)
                       .replace("{{NAME}}", lang.user)
                       .replace("{{SIZE}}", lang.size)
                       .replace("{{LINK}}", lang.link);
    language = jQuery(language);
    jQuery("#languages").append(language);
  }

}
body { text-align: left !important}

#answer-list {
  padding: 10px;
  width: 290px;
  float: left;
}

#language-list {
  padding: 10px;
  width: 290px;
  float: left;
}

table thead {
  font-weight: bold;
}

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>

\$\endgroup\$
  • 6
    \$\begingroup\$ I guess import in python is not permitted. \$\endgroup\$ – Alexandru Feb 1 '11 at 0:07
  • 26
    \$\begingroup\$ Does these rules apply to language keywords as well? \$\endgroup\$ – hallvabo Feb 1 '11 at 13:04
  • 8
    \$\begingroup\$ are those case insensitive restrictions? \$\endgroup\$ – oenone Aug 4 '11 at 14:22
  • 20
    \$\begingroup\$ Could someone explain why 2 and 7 are not allowed? I'm just curious as I don't see why those were chosen in particular. \$\endgroup\$ – Thomas Eding Aug 5 '11 at 23:01
  • 4
    \$\begingroup\$ @trinithis, and others, ASCII character 72 is "H" which is why I chose those two \$\endgroup\$ – Kevin Brown Sep 18 '11 at 23:18

125 Answers 125

0
\$\begingroup\$

Gol><>, 21 bytes

"mu{x`)xuunQ"T:Z;9-ot

This is a program that JoKing made, golfing the heck out of it.

Try it online!

Old version, 37 bytes

"Fcjjm"b3+s"Umpjb"c&rT&M:&33-)QPPot|;

This is a really simple, not very creative way of doing this, all it does is just encode everything 2 below their actual ascii encoding, the hardest part is not using 'l', which in gol><> is the length of the stack!

Try it online!

\$\endgroup\$
0
\$\begingroup\$

Python 3, 85 bytes

Not golfed, but obfuscated.

input(('%c'*11)%(9*8,93+8,99+9,9+99,3999//36,4*8,9*9+6,3996//36,4353//38,36*3,5*4*5))

Try it online!

\$\endgroup\$
  • 1
    \$\begingroup\$ From a golfing standpoint, the fact that you're already using 11 to break rule 2 means that every code point except 72, 32, and 87 are valid (since 0 will also be allowed). From an obfuscation standpoint, I'm sure there are more creative and fun numbers you can use, like idk, 33**3//399-3 for 87, 3225%346 for 111, etc. \$\endgroup\$ – Value Ink Jun 7 '19 at 21:45
0
\$\begingroup\$

(K+R)eg, 16 bytes

1 byte shorter than the accepted solution (GolfScript).

Jgnnq\"Yqtnf(;;'

This encodes the string by adding all characters by 2.

\$\endgroup\$
0
\$\begingroup\$

naz, 80 bytes

9a8m1o9a9a8a3a1o6a1a1o1o3a1o0m9a4m8a1o9s3s1o3m9s1o9a9a6a1o3a1o6s1o8s1o0m4a8m1a1o

Breaks rule 2 only.

\$\endgroup\$
0
\$\begingroup\$

W, 10 bytes

Glad that none of the characters appear in the compressed source.

,├▌♥♀√╫◙g5
\$\endgroup\$

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