[[][[]]+[]][+[]][++[+[]][+[]]]
This evaluates to "n" in javascript. Why?
Let's start with an empty array
[]
Now, let's access a member of it.
[][]
What member? Let's check for the empty array member
[][[]]
oh, that is undefined. But if we add an empty array to that, it is casted to the string "undefined"
[][[]]+[]
Let us wrap that in an array
[[][[]]+[]]
We can now try to access letters in that string. First, we must unwrap the string. That can be done by accessing the first element of that array.
[[][[]]+[]][0]
0 can be created by casting an empty array to a number:
[[][[]]+[]][+[]]
Now, "n" is the second letter in that string, so we would like to access that:
[[][[]]+[]][+[]][1]
But how can we write 1? Well, we increment 0, of course. Wrap 0 in an array, and increment the first member of it:
++[0][0]
Like before, this is equivalent to
++[+[]][+[]]
So our final code is then the glorious
[[][[]]+[]][+[]][++[+[]][+[]]]
ok
No one fucking cares because no one would write that in the first place.
>>62268141
Hy reddit
>>62268141
That's cool.
>>62268141
weak typing was a mistake
>>62268141
god, I'm not awake. I thought I was missing a font pack
I already read it in /r/ProgrammerHumor
Go fuck yourself you stealed it
CloudFlare uses this technique to very your browser executes Javascript in order to be more confident it's a real browser and not a bot.