Iterator

<programming> An object or routine for accessing items from a list, array or stream one at a time.

By extension, the term can be used for an object or routine for accesing items from any data structure that can be viewed as a list.

For example, a traverser is an iterator for tree-shaped data structures.

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it ITAR Iterated Function System iteration iterative deepening	by hand CLU Euclid iterator Parsley	Iternet ITHACA ITIL ITP ITS