Description:
Is used to traverse a container and access the container’s elements. The iterator pattern decouples algorithms from containers.Containers may be a list , graph ,tree etc.
Benefits:
- Supports variations in the traversal of a collection
- Simplifies the interface of the collection
When to use:
- Access collection object’s contents without exposing its internal representation
- Support multiple traversals of objects in a collection
- Provide a uniform interface for traversing different structures in a collection
Diagram:
Code samples are below and can be downloaded here.
