FilesExpand file tree

master

/

LogTwo.js

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

14 lines (14 loc) · 302 Bytes

master

/

LogTwo.js

Copy path

Top

File metadata and controls

• Code
• Blame

14 lines (14 loc) · 302 Bytes

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

/**

* https://handwiki.org/wiki/Binary_logarithm

* Approximate log2 using only bitwise operators

* @param {number} n

* @returns {number} Log2 approximation equal to floor(log2(n))

*/

export const logTwo = (n) => {

let result = 0

while (n >> 1) {

n >>= 1

result++

}

return result

}