Iterator

What is an Iterator in C#?

itMyt Explains Iterator:

An iterator, within the Context of C#, is a Block of Code that returns an ordered sequence of values of a group or Array. It is a member feature applied the use of the iterator bLock, which contains one or Greater Statements containing the "yield" Keyword.

An iterator is used to enable Clients of a box magNiFicence, containing a Collection or array, to traverse the gathering the usage of the "foreach" statement in a less difficult manner. It is used with Strongly Typed collection Classes to iterate complex Information Systems like Binary Bushes, which require recursive traversal and preserve the Iteration kingdom thru the recursion. The idea of iterator is likewise utilized in implementing deferred execution in LINQ queries.

What Does Iterator Mean?

The iterator is primarily based on a Design Pattern that gives a way to traverse the factors of a collection of gadgets sequentially without exposing the underlying shape of the collection. It removes the tedious project of implementing the "IEnumerator" Interface manually while growing collection classes that aid the "foreach" announcement. The Intermediate Language code vital for imposing the techniques and houses of the IEnumerator interface is generated by means of the Compiler, which leads to simpler Syntax, decreased code length, and improvement in Developer productiveness.

In fashionable, an iterator is much like a Database Cursor in that it offers get admission to to facts elements in a set, but does no longer carry out new release. An iterator can be applied in C# as a technique, Operator, or get Accessor. For Instance, an iterator may be used to traverse a group of Strings to show the content of each string within the series.

An iterator is represented by way of the IEnumerator interface and is applied by the Compiler with the subsequent strategies:

• MoveNext: A approach that advances to the following element of the collection and shows the stop of that series
• Current: A assets that fetches the price of the detail presently being pointed to
• Dispose: Cleans up the iteration

GetEnumerator() is the default iterator technique of the IEnumerable interface. This approach may be applied in the series that incorporates the Container class. The GetEnumerator() technique is invoked on execution of the "foreach" announcement, which Makes use of the returned enumerator to iterate thru values. The "yield return" Declaration is used within the iterator block to fetch an element of the gathering. It also helps to place the Modern area such that execution starts from this place the next time it happens. The "yield break" declaration ends the iteration.

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