Anecdotally, Programmers Dislike "Reduce"

Re:Anecdotally, Programmers Dislike "Reduce" by thaumasiotes on Thursday September 17, 2026 @03:45AM (#49737666)

> Map and filter usually have only one arg and if they have 2, the 2nd is almost always a 0-based index. They look identical in most languages, even when Microsoft chooses to call them Select and Where.

I don't understand. Map takes input of type a and size n and returns output of type b and size n.

Filter takes input of type a and size n and returns output of type a and size ≤ n.

They look nothing alike?

[ Parent | on HN ]

Re:Anecdotally, Programmers Dislike "Reduce" by dmi on Thursday September 17, 2026 @07:52AM (#49739450)

I think their point was that map/filter _individually_ look identical in most languages, i.e. map looks the same across most languages, and filter looks the same across languages, not that map and filter look identical to each other in most languages.

[ Parent | on HN ]