-let y const vs var https://medium.com/@germancutraro/var-let-y-const-js-es6-ed9222cad422
-template strings https://medium.com/@germancutraro/template-strings-js-es6-194a2c88d0f4
-arrow functions https://medium.com/laboratoria-how-to/funciones-y-es6-arrow-functions-871c2c6b06b1
-Nuevos Iterables y Bucle sobre datos (for-in y for-of) https://www.campusmvp.es/recursos/post/ECMAScript-2015-Los-nuevos-bucles-for-in-y-for-of.aspx