Find the number that only odd times form an array.
For example:
findOnlyOddTimesNumber([1,1,1,2,3,4,2,4,2,1,3]); // 2
const findOnlyOddTimesNumber = arr => arr.reduce((p,c) => p^c);
findOnlyOddTimesNumber([1,1,1,2,3,4,2,4,2,1,3]);// TODO: Replace examples and use TDD development by writing your own tests
// These are some CW specific test methods available:
// Test.expect(boolean, [optional] message)
// Test.assertEquals(actual, expected, [optional] message)
// Test.assertSimilar(actual, expected, [optional] message)
// Test.assertNotEquals(actual, expected, [optional] message)
// NodeJS assert is also automatically required for you.
// assert(true)
// assert.strictEqual({a: 1}, {a: 1})
// assert.deepEqual({a: [{b: 1}]}, {a: [{b: 1}]})
// You can also use Chai (http://chaijs.com/) by requiring it yourself
// var expect = require("chai").expect;
// var assert = require("chai").assert;
// require("chai").should();
describe("Solution", function(){
it("should test for something", function(){
Test.assertEquals("expected", "expected", "This is just an example of how you can write your own TDD tests");
});
});