Add solution #1009

Author: JoshCrozier

solutions/1009-complement-of-base-10-integer.js

@@ -0,0 +1,25 @@
+/**
+ * 1009. Complement of Base 10 Integer
+ * https://leetcode.com/problems/complement-of-base-10-integer/
+ * Difficulty: Easy
+ *
+ * Every non-negative integer N has a binary representation.
+ * For example, 5 can be represented as "101" in binary,
+ * 11 as "1011" in binary, and so on.  Note that except for
+ * N = 0, there are no leading zeroes in any binary representation.
+ *
+ * The complement of a binary representation is the number in binary
+ * you get when changing every 1 to a 0 and 0 to a 1. For example,
+ * the complement of "101" in binary is "010" in binary.
+ *
+ * For a given number N in base-10, return the complement of it's
+ * binary representation as a base-10 integer.
+ */
+
+/**
+ * @param {number} N
+ * @return {number}
+ */
+var bitwiseComplement = function(N) {
+  return parseInt(N.toString(2).split('').map(n => n ^ 1).join(''), 2);
+};