Let's say, we receive a binary representation of a number - how we can get the highest bit set in it (e.g. the biggest power of 2)?

For example: integer 9 -> binary 00001001 -> most left bit position 3

CodePudding user response：

Use the less-known native function Math.clz32:

const msb = n => 31 - Math.clz32(n);
console.log(msb(0b1001)); // 3