A tricky code collection

This repository will be a collection of tricky code.

Unless otherwise specified, programs linked from this repository are written by myself. I'm also trying to mention pioneer works for each code.

Categories

Binary

• Polyglot GIF

Esolang

See https://esolangs.org/wiki/Main_Page

• Befunge Lisp
• Sed Lisp
• cal(1) in Brainfuck

Polyglot

See http://en.wikipedia.org/wiki/Polyglot_(computing)

• 5 Languages Polyglot Quine
• Polyglot GIF
• Polyglot Symbolic Quine

Quine

See http://en.wikipedia.org/wiki/Quine_%28computing%29

• 5 Languages Polyglot Quine
• Keyword-only Perl
• Polyglot Symbolic Quine
• Python only with lowercase alphabets and parenthesis
• Radiation-hardened Quine
• Ruby only with lower-case alphabets

Restricted

Code written with some restrictions. For example, Ruby (>= 1.9), Perl, JavaScript, and Groovy are known to be turing complete only with symbolic characters (no alphabets, no numerals, no control characters, and no non-ascii characters.).

• Keyword-only Perl
• Polyglot Symbolic Quine
• Python only with lowercase alphabets and parenthesis
• Ruby only with lower-case alphabets

Languages

Befunge

• Befunge Lisp

Brainfuck

• 5 Languages Polyglot Quine
• Brainfuck in Ruby's Regexp
• cal(1) in Brainfuck

C

• 5 Languages Polyglot Quine

JavaScript

• Polyglot Symbolic Quine

Perl

• 5 Languages Polyglot Quine
• Keyword-only Perl
• Polyglot GIF
• Polyglot Symbolic Quine
• Radiation-hardened Quine

Python

• 5 Languages Polyglot Quine
• Python only with lowercase alphabets and parenthesis

Ruby

• 5 Languages Polyglot Quine
• Brainfuck in Ruby's Regexp
• Polyglot GIF
• Polyglot Symbolic Quine
• Radiation-hardened Quine
• Ruby only with lower-case alphabets

Sed

• Sed Lisp