Iteration

keep in mind...

1. for/of loops are not for objects!
2. use break to stop the loop
3. now possible to create custom iterators

Research More...

1. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Loops_and_iteration
2. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/for...of
3. https://hacks.mozilla.org/2015/04/es6-in-depth-iterators-and-the-for-of-loop
4. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols
5. https://stackabuse.com/es6-iterators-and-generators/
6. https://vegibit.com/iterators-in-es6/
7. https://javascript.info/iterable