340
votes
Accepted
Make your language unusable
JavaScript Shell
This will make the language completely unusable.
clear(this);
Isn't it nice how JavaScript has such a nice function to destroy itself?
This ...
- 28.9k
187
votes
Make your language unusable
Emmental
;#33!
I know this isn't code golf, but the right tool for the job, you know...
The user's code can be inserted after the ...
- 196k
107
votes
Make your language unusable
PHP
One can completely kill PHP by setting the memory limit to 1.
It will completely die.
Try this:
<?php
ini_set('memory_limit',1);
//code here
This ...
- 7,885
99
votes
Make your language unusable
x86 machine code in real mode (=> almost any DOS program)
00000000 6a 00 07 b9 00 04 30 c0 31 ff f3 aa |j.....0.1...|
0000000c
i.e.
...
- 3,819
83
votes
Reversed language name
PHP, 3 bytes
PHP
Try it online!
It looks like it outputs the language name, but it's actually the letters in reversed order.
- 46.2k
77
votes
72
votes
70
votes
Make your language unusable
Lua
_ENV=""
In Lua, _ENV is the environment that all global variables, functions, tables, etc are stored in. Defining ...
- 2,530
58
votes
54
votes
Make your language unusable
Smalltalk
I'm not sure if this qualifies:
Smalltalk := Nil.
This deletes the entire run-time environment, hanging the object engine. The only way to fix this is to ...
- 1,681
50
votes
Accepted
49
votes
Write a Programming language of Unknown Completeness
Legendre
This language is only Turing-complete if and only if Legendre's conjecture is false, i.e. there exists a integer n > 0 such that there are no primes between n^2 and (n+1)^2. This language ...
- 1,309
47
votes
Make your language unusable
Haskell
There are a couple of possibilities here.
Boring idea #1: Define main to do nothing. Now no matter what other code you write, it can never execute. (Unless ...
- 1,681
47
votes
Make your language unusable
PostScript
Yes, PostScript is a programming language. Moreover, it's a programming language where all language constructs are system-defined functions, which can be redefined...
...
- 1,681
45
votes
Patch the Image
Matlab
This is a simple interpolation approach. The idea is first mirroring what is on each side of the patch. Then those mirror image pixels are interpolated by how close they are to the ...
- 43.7k
41
votes
Accepted
40
votes
Make your language unusable
Any program executing under Linux/x86(-64)
This program is written in C, but it can disrupt execution of any program running under Linux/x86 (-32 or -64). You prepend it to the command-line ...
- 568
36
votes
Make your language unusable
TeX
\catcode`\\=10
I'm not sure this will actually work, but in theory this should break \ as escape character leaving you no ...
- 616
35
votes
Make your language unusable
Scratch
The when [timer v] > (0) will run as soon as the code is initialised, which if you're in the editor is before you even start the code. The ...
- 2,379
34
votes
Create a programming language that only appears to be unusable
Shuffle (written in C++), Cracked! by Martin
Edit Martin cracked it. To see his solution, click the link. My solution has also been added.
Edit Fixed print-d ...
- 3,205
33
votes
Images with all colors
C#
Wow, really cool things in this challenge. I took a stab at this at in C# and generated a 4096x4096 image in about 3 minutes (i7 CPU) using every single color via Random Walk logic.
Ok, so for ...
- 1,057
32
votes
Confound my attempts to solve the halting problem
brainfuck, 6013 4877 4376 bytes
Edit: -1136 bytes. Switched to a better way of generating the data for the quine
Edit2: -501 bytes. Revisited my self-interpreter and cut it down a couple of hundred ...
- 47.1k
32
votes
8 ought to become Infinity
Python3
Clean Program:
This is just a standard countdown while loop.
n = 8
while n != 0:
n -= 1
print("done")
Augmented Program:
...
- 25.7k
32
votes
Accepted
31
votes
Computer Generated Cracked Soil
Mathematica
A Voronoi diagram looks like this drawing, from Wikipedia, showing 19 cells, each containing a single seed point. A cell consists of the subregion of points which the respective ...
- 25.3k
30
votes
Make your language unusable
PHP
I'm suprised that it actually works, but closing STDOUT and STDERR suppresses all output. To be sure that they will not be ...
- 2,062
30
votes
Make your language unusable
Mathematica / Wolfram Language
Mathematica is an interpreted language in which command names are symbols that can be manipulated by the programmer. You can't delete built-in operators, but you can ...
- 3,483
30
votes
Paint by Numbers (using programming, not numbers)
Spectral airbrushing (Python, PIL, scipy)
This uses a sophisticated mathematical algorithm to produce colourful nonsense. The algorithm is related to Google's PageRank algorithm, but for pixels ...
- 7,232
29
votes
Create a programming language that only appears to be unusable
Brian & Chuck, Cracked by cardboard_box
I've been intrigued for some time now by the idea of a programming language where two programs interact with each other (probably inspired by ROCB). This ...
- 196k
Only top scored, non community-wiki answers of a minimum length are eligible