this post was submitted on 15 Sep 2026
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Programming
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Isn’t reduce just aggregation operations such as count, sum, etc? What’s even the alternative there if someone disliked doing aggregation for some reason? What if I anecdotally disliked subtraction?
It's aggregation in general. It's the iterator function you can use to implement sum, or count, or both at the same time.
This post is just saying that's interesting that people dislike is more than say map or filter
The alternative most people probably use is iterative loops, like for loops and while loops and the like, with a mutable variable somewhere. I don't love it, personally.
I guess the other potential alternative is doing the iteration recursively, but I doubt that's what most people think of as an alternative to reduce.
If u don’t like subtraction you can add after multiplying by -1