Iterator Design Pattern

The Iterator design pattern illustration, UML diagram. (Photo credit: Wikipedia)

The iterator pattern is used to access objects that are stored in many different types of collection.
This is done by creating a common interface that all the different collection classes share. Then an iterator is provided to traverse the objects they contain.

Because all different Collection classes share a common interface they can be treated polymorphically and it eliminate duplicate code.

Below is the video tutorial for the Iterator pattern

Related articles

• The For-Each Loop(iontech.wordpress.com)

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