# MapIterator

`import { MapIterator } from "destack:iter";`

Iterator that maps each yielded value.

```ds title="MapIterator"
export struct MapIterator<I, T, U>
```

[language/library/src/iter/iterator.ds:72:81](https://github.com/destack-sh/destack/blob/main/language/library/src/iter/iterator.ds#L72-L81)