---
title: LazyMapCollection
framework: swift
role: symbol
role_heading: Type Alias
path: swift/lazymapcollection
---

# LazyMapCollection

A Collection whose elements consist of those in a Base Collection passed through a transform function returning Element. These elements are computed lazily, each time they’re read, by calling the transform function on a base element.

## Declaration

```swift
typealias LazyMapCollection<T, U> = LazyMapSequence<T, U> where T : Collection
```

## See Also

### Lazy Wrappers

- [LazySequence](swift/lazysequence.md)
- [LazyMapSequence](swift/lazymapsequence.md)
- [LazyFilterSequence](swift/lazyfiltersequence.md)
- [LazyPrefixWhileSequence](swift/lazyprefixwhilesequence.md)
- [LazyDropWhileSequence](swift/lazydropwhilesequence.md)
- [LazyCollection](swift/lazycollection.md)
- [LazyDropWhileCollection](swift/lazydropwhilecollection.md)
- [LazyFilterCollection](swift/lazyfiltercollection.md)
- [LazyPrefixWhileCollection](swift/lazyprefixwhilecollection.md)