Update 190-reverse-bits.js

Author: everthis

190-reverse-bits.js

@@ -1,3 +1,23 @@
+/**
+ * @param {number} n - a positive integer
+ * @return {number} - a positive integer
+ */
+const reverseBits = function(n) {
+  let r = 0;
+  for (let i = 0; i < 32; i++) {
+    if (n & 1) {
+      r = r | 1;
+    } 
+    if (i !== 31) {
+       r = r << 1;
+       n = n >> 1;
+    }
+  }
+  return r >>> 0;
+};
+
+// another
+
 /**
  * @param {number} n - a positive integer
  * @return {number} - a positive integer