Merge pull request #7 from vince19972/master

added power function

Author: shiffman

sketch.js

@@ -29,6 +29,14 @@ function anomalyCode(x) {
   return '5' + x - x;
 }
 
+function anomalyCode(x) {
+  return '5' + x - x;
+}
+
+function power(base, exponent) {
+  return Math.pow(base, exponent);
+}
+
 function nOfFibonacci(x) {
   let n = parseInt(x, 10);
   return (!n || n < 1) ? -1 : (n < 3 ? 1 : (nOfFibonacci(n-1) + nOfFibonacci(n-2)));
@@ -43,5 +51,6 @@ module.exports = {
   sayHelloTo: sayHelloTo,
   answer: answer,
   anomalyCode: anomalyCode,
+  power: power,
   nOfFibonacci: nOfFibonacci
 }

sketch.test.js

@@ -1,4 +1,4 @@
-const { sum, sub, prod, digital_root, sum42, sayHelloTo, anomalyCode, nOfFibonacci } = require('./sketch');
+const { sum, sub, prod, digital_root, sum42, sayHelloTo, anomalyCode, power, nOfFibonacci } = require('./sketch');
 const fs = require("fs");
 const path = require("path");
 const fetch = require("node-fetch");
@@ -97,6 +97,10 @@ test('anomalyCode thousand should be 50000', () => {
   expect(anomalyCode(7891)).toBe(50000);
 })
 
+test('power of one number', () => {
+  expect(power(2, 2)).toBe(4);
+})
+
 test('the 20th number of fibonacci should be 6765', () => {
   expect(nOfFibonacci(20)).toBe(6765);
 })