como usar o isPowerOfTwo no javascript es6
January 04, 2020
Returns true
if the given number is a power of 2
, false
otherwise.
Use the bitwise binary AND operator (&
) to determine if n is a power of
2.
Additionally, check that n
is not falsy.
const isPowerOfTwo = n => !!n && (n & (n - 1)) == 0;
isPowerOfTwo(0); // false
isPowerOfTwo(1); // true
isPowerOfTwo(8); // true