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

Add next power of two algorithm

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)
+  })
+})