James Sinclair jrsinclair.com

Functional JavaScript: how to use Array Reduce for more than just numbers  ↦

I’m blown away by the clarity of explanation in this post, and came away with it excited to start using Reduce way more. Definitely worth a read to level up your game.

Reduce is the Swiss-army knife of array iterators. It’s really powerful. So powerful, you can build most of the other array iterator methods with it, like .map(), .filter() and .flatMap(). And in this article we’ll look at some more amazing things you can do with it. But, if you’re new to array iterator methods, .reduce() can be confusing at first.


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