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submitted 2 months ago by lysdexic@programming.dev to c/programming@programming.dev

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[–] metiulekm@sh.itjust.works 10 points 2 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.

[–] nous@programming.dev 3 points 2 months ago* (last edited 2 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.