Can anyone help me with this JavaScript expression?
+[[+!![]]+[+![]]+[+!![]]+[-~!![]+-~!![]-~!![]]+[-~!![]]+[+![]]+[+!![]]+[-~!![]+-~!![]]]
A friend sent it to me and asked me to copy and paste it in the browser console.
This is the result:
10162014
If anyone could explain this to me or at least point me to right references please. Thanks!
Answer
First break out your code to this: !![]
which returns true (!! is to convert to boolean) and now +
converts to number so +!![]
returns 1.
![]
converts to false so +![]
returns 0.
~[]
returns -1
and ~![]
also returns -1
.
~!![]
returns -2
.
Now, -~!![]
returns 2
and -~![]
returns 1.
So, combining them all returns 10162014.
All about you to know is ~, !, +, & -
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