Codewars 7 kyu Coding Meetup #5 - Prepare the Count of Languages Javascript

this one uses the for...in statement as well as the reduce() method and more for...in info: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...in reduce() info: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/reduce bitwise not (~) info: https://blog.logrocket.com/interesting-use-cases-for-javascript-bitwise-operators/