Stack Exchange network consists of 178 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
View all activity pages
Pretty simple approach using ES6 Set and ES7 Array comprehensions spread operator:
22 bytes less than the indexOf approach. Worked on a ...