it's the NOT bitwise operator. It changes the 1 by 0 and 0 by 1. In that example, he is doing it twice.
~ 5 => ~0101 => 1010 ~~5 => ~(~0101) => ~(1010) => 0101 => 5
w3schools.com/js/js_operators.asp
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it's the NOT bitwise operator. It changes the 1 by 0 and 0 by 1. In that example, he is doing it twice.
~ 5 => ~0101 => 1010
~~5 => ~(~0101) => ~(1010) => 0101 => 5
w3schools.com/js/js_operators.asp