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developer-roadmap/roadmaps/javascript/content/forin-loop@cq3vvFZoNnAAZJ6oEBUwb.md
Arik Chakma 274082fd77 feat: clean roadmap content and sync scripts (#10181)
* refactor: clean to roadmap content

* refactor: move shared helpers into scripts/lib
2026-07-28 05:45:17 +06:00

562 B

for...in loop

The for...in loop iterates over the enumerable properties of an object, including inherited ones. It is mainly used for iterating over object keys. It is not recommended for arrays because it iterates over all enumerable properties, not just numeric indexes, and does not guarantee order.

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