chore: Merge pull request #777 from indremak/add-next-power-of-two-algorithm

Add next power of two algorithm

Author: raklaptudirm

Bit-Manipulation/NextPowerOfTwo.js

@@ -0,0 +1,18 @@
+/**
+ *
+ * This script will find next power of two
+ * of given number.
+ * More about it:
+ * https://www.techiedelight.com/round-next-highest-power-2/
+ *
+ */
+
+export const nextPowerOfTwo = (n) => {
+ if (n > 0 && (n & (n - 1)) === 0) return n
+ let result = 1
+ while (n > 0) {
+ result = result << 1
+ n = n >> 1
+ }
+ return result
+}

Bit-Manipulation/test/NextPowerOfTwo.test.js

@@ -0,0 +1,18 @@
+import { nextPowerOfTwo } from '../NextPowerOfTwo'
+
+describe('NextPowerOfTwo', () => {
+ it.each`
+ input | result
+ ${0} | ${1}
+ ${1} | ${1}
+ ${2} | ${2}
+ ${3} | ${4}
+ ${5} | ${8}
+ ${125} | ${128}
+ ${1024} | ${1024}
+ ${10000} | ${16384}
+ `('returns $result when is given $input', ({ input, result }) => {
+ const res = nextPowerOfTwo(input)
+ expect(res).toBe(result)
+ })
+})