5.6 solution

Author: amejiarosario

src/05-bits/06-conversion.js

@@ -3,16 +3,39 @@
  * 5.6 Conversion: Write a function to determine the number of bits you would need to flip to convert integer A to integer B.
 
  EXAMPLE
- Input: 29 (or: 111131), 15 (or: 131111)
+ Input: 29 (or: 111101), 15 (or: 101111)
 
  Output: 2
 
  Hints: #336, #369
  *
- * @param number
+ * @param number1
+ * @param number2
  */
-function conversion(number) {
+function conversion(number1, number2) {
+  return countOnes(number1 ^ number2);
+}
+
+function countOnes(num) {
+  let ones = 0;
+
+  while(num > 0) {
+    if(num & 1) {
+      ones++;
+    }
+    num >>= 1;
+  }
 
+  return ones;
 }
 
-module.exports = conversion;
+module.exports = conversion;
+
+
+/*
+xor
+
+
+
+
+ */

src/05-bits/06-conversion.spec.js

@@ -2,11 +2,11 @@ const expect = require('chai').expect;
 const conversion = require('./06-conversion');
 
 describe('Bit Manipulation: conversion', function() {
-  it('power of two', function() {
-    expect(conversion(0b0)).to.equal(true);
+  it('29 and 15', function() {
+    expect(conversion(0b111101, 0b101111)).to.equal(2);
   });
 
-  it('no power of two', function() {
-    expect(conversion(0b111)).to.equal(false);
+  it('one and zero', function() {
+    expect(conversion(0b01, 0b00)).to.equal(1);
   });
 });