CONCEPTS
    1. "this" keyword
    https://www.youtube.com/watch?v=aHPK2rsonZA&ab_channel=ApnaCollege
    http://javascriptissexy.com/understand-javascripts-this-with-clarity-and-master-it/

FRONTEND INTERVIEW QUESTION
    1. Memoized Functions
    https://www.youtube.com/watch?v=Mip6ejPRXko&list=PLe3J6mZBq1xUWVBMpSR2zpp8paWMJQ91b&index=2&ab_channel=JsCafe


Packages
   1. Redis class
   https://www.youtube.com/watch?v=UMFAMyOkThw&ab_channel=mewtru