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closes #3019

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Ilya Kantor 2022-06-19 17:39:36 +03:00
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1-js/04-object-basics/01-object/article.md
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@ -355,7 +355,7 @@ In the code above, the property `obj.test` technically exists. So the `in` opera
Situations like this happen very rarely, because `undefined` should not be explicitly assigned. We mostly use `null` for "unknown" or "empty" values. So the `in` operator is an exotic guest in the code.
## The "for..in" loop
## The "for..in" loop [#forin]
To walk over all keys of an object, there exists a special form of the loop: `for..in`. This is a completely different thing from the `for(;;)` construct that we studied before.