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Remove duplicates from an array of numbers/strings If you have a good example of using a map or reduce method - post it in the comments section. It surprised me how simplified the codebase became. Recently I rewrote a few modules using these great functions. But, what I’ve seen a lot is 7–8 line for-loop statements for solving a regular task where Array.reduce could do it in one line. Moreover, I’ve never seen it in a real codebase. When you read about Array.reduce and how cool it is, the first and sometimes the only example you find is the sum of numbers.

By Alex Permyakov How to simplify your codebase with map(), reduce(), and filter() in JavaScript Photo by Anders Jildén on Unsplash