A free email-based course to learn JS Array functions

map, filter, some, and reduce  — the essentials to work with collections

They are Javascript's way of saying "Hey, 2010's long passed, let's add the functions virtually all other languages have for ages"

They are a definite level-up from for and while loops

And finally, you'll be able to understand the code you write even after a week

14 emails

One every day, for two weeks straight

With plenty of click-to-try examples, short exercises, and case studies

  map, filter, some, and reduce

Present in every Array, supported by all modern browsers

Using Java, Swift, Ruby, or something else? Learn the concepts once and find the same functions in all these languages