JSFuck (2012)

#1

Post by tomrod » Sun, Sep 26, 2021, 12:21 AM UTC

JSFuck (2012)
jsfuck.com

Re: JSFuck (2012)

#2

Post by tombert » Sun, Sep 26, 2021, 1:16 AM UTC

This reminds me of a blog post about using pure lambda calculus for whiteboard problems [1].

I'm always fascinated by these "minimum viable language projects", since I think they sort of get into a fundamental concept: what is computing exactly?

[1] https://www.jtolio.com/2017/03/whiteboard-problems-in-pure-l...

Re: JSFuck (2012)

#3

Post by odyssey7 » Sun, Sep 26, 2021, 1:20 AM UTC

This is fascinating.

Re: JSFuck (2012)

#4

Post by kyeb » Sun, Sep 26, 2021, 1:22 AM UTC

This is horrifying.

Re: JSFuck (2012)

#5

Post by esoprogramming » Sun, Sep 26, 2021, 1:26 AM UTC

Interview with its creator, Martin Kleppe, here: https://esoteric.codes/blog/interview-with-martin-kleppe

Re: JSFuck (2012)

#6

Post by fnord77 » Sun, Sep 26, 2021, 1:29 AM UTC

how is this "educational"? it's about as readable as hexadecimal machine code. What's the lesson?

Re: JSFuck (2012)

#7

Post by abacadaba » Sun, Sep 26, 2021, 1:32 AM UTC

This is amazing!

Re: JSFuck (2012)

#8

Post by usui » Sun, Sep 26, 2021, 1:33 AM UTC

I don't understand how this works. I've seen brainfuck before, but not truly understood it. How is it possible to open up a new tab, paste the encoded form, and have working JavaScript?

Re: JSFuck (2012)

#9

Post by abacadaba » Sun, Sep 26, 2021, 1:36 AM UTC

New interview question: What will be the result of running the following code?

[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[ ]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]][([][(![]+[])[+[]]+([![]]+[][[] ])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+ (!![]+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[][(![]+[])[+[]]+([![]]+[][[]])[+ !+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![ ]+[])[+!+[]]])[+!+[]+[+[]]]+([][[]]+[])[+!+[]]+(![]+[])[!+[]+!+[]+!+[]]+(!![] +[])[+[]]+(!![]+[])[+!+[]]+([][[]]+[])[+[]]+([][(![]+[])[+[]]+([![]]+[][[]])[ +!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!! []+[])[+!+[]]]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[][(![]+[])[+[]]+([![ ]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[])[+[]]+(!![]+[])[!+[]+!+[ ]+!+[]]+(!![]+[])[+!+[]]])[+!+[]+[+[]]]+(!![]+[])[+!+[]]]((![]+[])[+!+[]]+(![ ]+[])[!+[]+!+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]+(!![]+[])[+[]]+(! []+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[]) [+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[!+[]+!+[]+[+[]]]+[+!+[]]+( !![]+[][(![]+[])[+[]]+([![]]+[][[]])[+!+[]+[+[]]]+(![]+[])[!+[]+!+[]]+(!![]+[ ])[+[]]+(!![]+[])[!+[]+!+[]+!+[]]+(!![]+[])[+!+[]]])[!+[]+!+[]+[+[]]])()

Re: JSFuck (2012)

#10

Post by colejohnson66 » Sun, Sep 26, 2021, 1:37 AM UTC

usui wrote: post #8

I don't understand how this works. I've seen brainfuck before, but not truly understood it. How is it possible to open up a new tab, paste the encoded form, and have working JavaScript?

This isn't related to BF (despite looking like it). At the bottom of the page, it explains how the conversions work. Basically, it takes advantage of JavaScript's loose typing and implicit conversions.