this post was submitted on 05 Sep 2024
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Programming

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[โ€“] [email protected] 10 points 3 months ago (1 children)

Same in Python, Rust, Haskell and probably many others.

But apparently JS does work that way, that is its filter always iterates over everything and returns a new array and not some iterator object.

[โ€“] nous 3 points 3 months ago* (last edited 3 months ago)

The old methods on Array will eagerly evaluate all elements. But JS has a new Iterator type with methods that works lazily instead.