How is it possible to only use ()[]+! to make javascript code?
Ex: http://discogscounter.getfreehosting.co.uk/js-noalnum.php
+10
A:
See Java/script: no alnum cheat sheets.
In short, various constructs yield NaN/undefined/window/etc. Stringify and index them to yield any string. Extract a property and call it to execute code.
ephemient
2010-02-26 17:40:45
And how does `+[]` yield 3?
0xA3
2010-02-26 17:47:42
It doesn't, it yields 0 (in 3 characters). To get 3, use `3=true+true+true=!0+!0+!0=!+[]+!+[]+!+[]`.
ephemient
2010-02-26 17:58:22