diff --git a/Bit-Manipulation/LogTwo.js b/Bit-Manipulation/LogTwo.js
new file mode 100644
index 0000000000..844a7ac5e5
--- /dev/null
+++ b/Bit-Manipulation/LogTwo.js
@@ -0,0 +1,14 @@
+/**
+ * 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
+}
diff --git a/Bit-Manipulation/test/LogTwo.test.js b/Bit-Manipulation/test/LogTwo.test.js
new file mode 100644
index 0000000000..e811f29b23
--- /dev/null
+++ b/Bit-Manipulation/test/LogTwo.test.js
@@ -0,0 +1,7 @@
+import { logTwo } from '../LogTwo'
+
+for (let i = 1; i < 100; i++) {
+ test('log2(' + i + ')', () => {
+ expect(logTwo(i)).toBe(Math.floor(Math.log2(i)))
+ })
+}
pFad - Phonifier reborn
Pfad - The Proxy pFad of © 2024 Garber Painting. All rights reserved.
Note: This service is not intended for secure transactions such as banking, social media, email, or purchasing. Use at your own risk. We assume no liability whatsoever for broken pages.
Alternative Proxies:
Alternative Proxy
pFad Proxy
pFad v3 Proxy
pFad v4 Proxy